CN116261083A

CN116261083A - Audio signal output method, circuit and electronic equipment

Info

Publication number: CN116261083A
Application number: CN202111506933.4A
Authority: CN
Inventors: 赵京
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2023-06-13

Abstract

The application provides an audio signal output method, an audio signal output circuit and electronic equipment. The method is applied to an audio output circuit, and the audio output circuit comprises: the device comprises a power supply module, a control module, a voltage regulating module, a power amplifier module and a loudspeaker. In the method, the power supply module can supply power to the control module, the voltage regulating module and the power amplifier module, so that the control module controls the voltage regulating module to work in different booster circuits according to the calculated amplitude of the audio signal to be played, and provides the adaptive input voltage for the power amplifier module, thereby driving the loudspeaker to output sound. The energy distribution of the audio is mainly concentrated in the middle-low frequency part, the amplitude of the low-frequency signal is larger, and the compression of the low-frequency signal can be avoided by providing higher input voltage for the power amplification module, so that the dynamic range of the low-frequency part is improved, and the audio output effect is optimized. In addition, the voltage regulating module is controlled to work in different circuits to provide the adaptive input voltage for the power amplifier module, so that the power consumption can be reduced, and the power efficiency can be improved.

Description

Audio signal output method, circuit and electronic equipment

Technical Field

The present disclosure relates to the field of hardware technologies, and in particular, to an audio signal output method, a circuit, and an electronic device.

Background

With the popularization of multimedia devices such as mobile phones, notebooks, sound equipment, vehicle-mounted computers and the like, users have higher requirements on audio playing effects in the multimedia devices. However, the output voltage of the battery in the device is limited, and meanwhile, the battery is limited by the current in the power amplifier, so that higher voltage cannot be provided for the power amplifier, in order to ensure that the audio signal cannot be distorted, the mode of limiting the amplification factor or limiting the amplitude of the input audio signal is adopted to ensure that the audio signal cannot exceed the voltage of the power amplifier, but the mode can cause poor audio output effect. In addition, if the lower battery voltage is increased to the higher power amplifier voltage, the voltage difference of the boost circuit in the power amplifier is excessively large, so that the power efficiency is reduced.

Based on the above-mentioned problems, how to optimize the audio output effect and improve the power efficiency of the audio signal output circuit is a problem to be solved.

Disclosure of Invention

The application provides an audio signal output method, an audio signal output circuit and electronic equipment. In the method, the control module can control the voltage regulating module to work in different boost circuits according to the calculated amplitude of the audio signal to be played, and provide the adaptive pushing power for the power amplifier module so as to drive the loudspeaker to output sound. Not only can the audio output effect be optimized, but also the power consumption in the circuit can be reduced, and the power efficiency is improved.

In a first aspect, the present application provides an audio signal output circuit comprising: the device comprises a voltage regulating module, a control module, a power amplifier module and a loudspeaker; the control module is electrically connected with the voltage regulating module, the control module is also electrically connected with the power amplification module, the voltage regulating module is electrically connected with the power amplification module, and the power amplification module is electrically connected with the loudspeaker; the voltage regulating module is used for receiving a first power supply voltage provided by a power supply; the control module is used for inputting and sending an audio signal to the power amplification module, and controlling the voltage regulation module to regulate the first power supply voltage to a second power supply voltage according to the amplitude of the audio signal; the voltage regulating module is also used for outputting the second power supply voltage to the power amplifier module; the power amplification module is used for amplifying the audio signal and then sending the amplified audio signal to the loudspeaker under the drive of the second power supply voltage; the speaker is used for converting the amplified audio signal into sound.

After the audio signal output circuit provided in the first aspect is adopted, an adaptive voltage can be provided for the power amplifier according to the amplitude of the audio signal, and then an adaptive push power is provided to drive the loudspeaker to output sound. Not only can the audio output effect be optimized, but also the power consumption in the circuit can be reduced, and the power efficiency is improved.

The audio signal output circuit provided in combination with the first aspect, the voltage regulating module comprises a first circuit, a second circuit and a third circuit; the first circuit is used for adjusting the first power supply voltage to the second power supply voltage with a first value; the second circuit is used for adjusting the first power supply voltage to a second power supply voltage with a second value; the third circuit is used for adjusting the first power supply voltage to the second power supply voltage in a first value range; the first value is smaller than the second value, and the second value is smaller than the minimum value in the first value range.

Thus, the boosting module can comprise various circuits, and can output different voltage values when different circuit paths are selected, so that the feasibility of the scheme is improved.

In combination with the audio signal output circuit provided in the first aspect, the control module is configured to send an audio signal to the power amplification module, and control the voltage regulation module to regulate the first power supply voltage to a second power supply voltage according to the amplitude of the audio signal, and specifically includes: when the amplitude of the audio signal is smaller than the first preset amplitude, the control module sends a first enabling signal to the first circuit; the first circuit is specifically configured to output the second supply voltage of the first value to the power amplifier module after receiving the first enable signal; when the amplitude of the audio signal is smaller than or equal to a second preset amplitude and larger than the first preset amplitude, the control module sends a second enabling signal to the second circuit; the second circuit is specifically configured to output the second power supply voltage of the second value to the power amplifier module after receiving the second enable signal.

Thus, the control module can determine the amplitude level of the audio signal, input an enabling signal to the boosting module to control different circuits to work, and the voltage values output by the different circuits are different, so that the power amplifier module is provided with the estimated power of different levels, the audio output effect is improved, and the power supply efficiency is improved.

In combination with the audio signal output circuit provided in the first aspect, the control module is configured to send an audio signal to the power amplification module, and control the voltage regulation module to regulate the first power supply voltage to a second power supply voltage according to the amplitude of the audio signal, and specifically includes: the control module is specifically used for: when the amplitude of the audio signal is larger than the second preset amplitude, the control module sends a first voltage regulating signal to the third circuit; the first voltage regulating signal is used for regulating the value of the second power supply voltage output by the third circuit into a third value, and the third value is in the first value range; the third circuit is specifically configured to output the second supply voltage of the third value after receiving the first voltage regulation signal.

Thus, the low frequency component in the music signal is large, and it accounts for about 70% of the whole music signal. In order to achieve the power efficiency and the low-frequency output effect, the high-amplitude low-frequency signals can be further divided, and corresponding voltages are dynamically adjusted to be output by corresponding circuits according to the input voltage-adjusting signals of the amplitude-adjusting module in real time, so that adaptive pushing power is provided for the loudspeaker. Further improving the output effect of the low-frequency signals and improving the power efficiency.

In combination with the audio signal output circuit provided in the first aspect, the control module is further configured to: when the amplitude of the audio signal is larger than the second preset amplitude, a third enabling signal is sent to the third circuit; the third enabling signal is used for triggering the third circuit to output the second power supply voltage; the third circuit is specifically configured to output the second supply voltage of the third value after receiving the third enable signal and the first voltage regulation signal.

In this way, in the process of dynamically adjusting the output voltage of the boost module according to the large-amplitude low-frequency signal, the corresponding voltage can be dynamically adjusted by two independent control signals, namely the enabling signal and the voltage adjusting signal, besides one voltage adjusting signal. Thereby improving the feasibility of the scheme.

With reference to the audio signal output circuit provided in the first aspect, the first value is equal to the value of the first supply voltage; the second value is equal to twice the value of the first supply voltage; the third value is greater than the second value.

Therefore, different circuits can be controlled to work according to the amplitude of the audio signal, the adaptive voltage can be provided for the power amplifier, the audio output effect is improved, and the power consumption in the circuit can be reduced.

The audio signal output circuit provided in combination with the first aspect, wherein the first circuit comprises a first switch, and the first switch is used for receiving the first enabling signal, so that the first circuit outputs the second power supply voltage with the first value to the power amplifier module; the second circuit comprises a first charge pump and a second switch, and the first charge pump is electrically connected with the second switch; the first charge pump is used for receiving the first power supply voltage; the second switch is used for receiving the second enabling signal, so that the second circuit outputs the second power supply voltage with the second value to the power amplifier module.

The audio signal output circuit provided in combination with the first aspect, the third circuit including a second charge pump and a third boost type switching circuit, the second charge pump being electrically connected to the third boost type switching circuit; the second charge pump is used for receiving the first power supply voltage; the third boost switch circuit is used for outputting the second power supply voltage of the third value after receiving the first voltage regulating signal; or the third boost switch circuit is used for outputting the second power supply voltage of the third value after receiving the first voltage regulating signal and the third enabling signal.

In combination with the audio signal output circuit provided in the first aspect, the first charge pump and the second charge pump are the same charge pump or different charge pumps.

Therefore, a plurality of circuits in the boosting module can share the same circuit element, and the circuit cost is saved.

With reference to the audio signal output circuit provided in the first aspect, the boost ratio of the first charge pump is a first ratio, and the first charge pump is configured to adjust the value of the first supply voltage to a second supply voltage of the first value; when the second charge pump is different from the first charge pump, the boosting ratio of the second charge pump is a second ratio; the first ratio is different from the second ratio.

Therefore, aiming at different application scenes of the audio signal output circuit, the output voltage of the boosting module can be changed only by replacing the charge pump in the boosting module, and the suitability of the circuit is improved.

In a second aspect, the present application provides an audio signal output method applied to an audio signal output circuit, the audio signal output circuit comprising: the device comprises a voltage regulating module, a control module, a power amplifier module and a loudspeaker; the control module is electrically connected with the voltage regulating module, the control module is also electrically connected with the power amplification module, the voltage regulating module is electrically connected with the power amplification module, and the power amplification module is electrically connected with the loudspeaker; the method comprises the following steps: the voltage regulating module receives a first power supply voltage provided by a power supply; the control module sends an audio signal to the power amplification module, and controls the voltage regulation module to regulate the first power supply voltage to a second power supply voltage according to the amplitude of the audio signal; the voltage regulating module outputs the second power supply voltage to the power amplifier module; the power amplification module amplifies the audio signal and sends the amplified audio signal to the loudspeaker under the drive of the second power supply voltage; the speaker converts the amplified audio signal into sound.

After the audio signal output method provided by the second aspect is adopted, the power amplifier can be provided with an adaptive voltage according to the amplitude of the audio signal, and then the adaptive pushing power is provided to drive the loudspeaker to output sound. Not only can the audio output effect be optimized, but also the power consumption in the circuit can be reduced, and the power efficiency is improved.

The audio signal output method provided in combination with the second aspect, the voltage regulating module includes a first circuit, a second circuit and a third circuit; the first circuit is used for adjusting the first power supply voltage to the second power supply voltage with a first value; the second circuit is used for adjusting the first power supply voltage to a second power supply voltage with a second value; the third circuit is used for adjusting the first power supply voltage to the second power supply voltage in a first value range; the first value is smaller than the second value, and the second value is smaller than the minimum value in the first value range.

In combination with the audio signal output method provided in the second aspect, the control module controls the voltage regulating module to regulate the first power supply voltage to the second power supply voltage according to the amplitude of the audio signal, and specifically includes: when the amplitude of the audio signal is smaller than the first preset amplitude, the control module sends a first enabling signal to the first circuit; the first circuit receives the first enabling signal and then outputs the second power supply voltage with the first value to the power amplifier module; when the amplitude of the audio signal is smaller than or equal to a second preset amplitude and larger than the first preset amplitude, the control module sends a second enabling signal to the second circuit; the second circuit receives the second enabling signal and then outputs the second power supply voltage with the second value to the power amplifier module.

In combination with the audio signal output method provided in the second aspect, the control module controls the voltage regulating module to regulate the first power supply voltage to the second power supply voltage according to the amplitude of the audio signal, and specifically includes: when the amplitude of the audio signal is larger than the second preset amplitude, the control module sends a first voltage regulating signal to the third circuit; the third circuit receives the first voltage regulating signal and then outputs the second power supply voltage with the third value; the first voltage regulating signal is used for regulating the value of the second power supply voltage output by the third circuit to a third value, and the third value is in the first value range.

In combination with the audio signal output method provided in the second aspect, the control module controls the voltage regulating module to regulate the first power supply voltage to the second power supply voltage according to the amplitude of the audio signal, and specifically includes: when the amplitude of the audio signal is larger than the second preset amplitude, the control module also sends a third enabling signal to the third circuit; the third enabling signal is used for triggering the third circuit to output the second power supply voltage; the third circuit receives the third enabling signal and the first voltage regulating signal and then outputs the second power supply voltage with the third value.

With reference to the audio signal output method provided in the second aspect, the first value is equal to the value of the first supply voltage; the second value is equal to twice the value of the first supply voltage; the third value is greater than the second value.

With reference to the audio signal output method provided in the second aspect, the first circuit includes a first switch, the second circuit includes a first charge pump and a second switch, and the first charge pump is electrically connected with the second switch; the first charge pump is used for receiving the first power supply voltage; the first circuit outputs the second power supply voltage of the first value to the power amplifier module after receiving the first enabling signal, and specifically includes: the first switch receives the first enabling signal, so that the first circuit outputs the second power supply voltage with the first value to the power amplifier module; the second circuit outputs the second power supply voltage of the second value to the power amplifier module after receiving the second enabling signal, and specifically includes: the second switch is used for receiving the second enabling signal, so that the second circuit outputs the second power supply voltage with the second value to the power amplifier module.

With reference to the audio signal output method provided in the second aspect, the third circuit includes a second charge pump and a third boost type switching circuit, and the second charge pump is electrically connected with the third boost type switching circuit; the second charge pump is used for receiving the first power supply voltage; the third circuit outputting the second power supply voltage of the third value after receiving the first voltage regulating signal specifically includes: the third boost type switch circuit receives the first voltage regulating signal and then outputs the second power supply voltage with the third value; or the third boost switch circuit receives the first voltage regulating signal and the third enabling signal and then outputs the second power supply voltage with the third value.

In combination with the audio signal output method provided in the second aspect, the first charge pump and the second charge pump are the same charge pump or different charge pumps.

With reference to the audio signal output method provided in the second aspect, the boost ratio of the first charge pump is a first ratio, and the first charge pump is configured to adjust the value of the first supply voltage to a second supply voltage of the first value; when the second charge pump is different from the first charge pump, the boosting ratio of the second charge pump is a second ratio; the first ratio is different from the second ratio.

In a third aspect, the present application provides a chip for application to an audio signal output circuit, the chip comprising one or more processors for invoking computer instructions to cause the audio signal output circuit to perform a method as described in any of the second aspects.

In a fourth aspect, the present application provides a computer readable storage medium comprising instructions which, when run on an audio signal output circuit, cause the electronic device to perform the method as described in any of the second aspects.

In a fifth aspect, the present application provides an electronic device comprising one or more processors and one or more memories; wherein the one or more memories are coupled to the one or more processors, the one or more memories for storing computer program code comprising computer instructions that, when executed by the one or more processors, cause the electronic device to perform the method as described in any of the second aspects.

Drawings

Fig. 1 is a topology diagram of an audio signal output circuit according to an embodiment of the present application;

fig. 2 is a schematic diagram of an audio signal output device 20 according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of another audio signal output device 20 according to an embodiment of the present disclosure;

fig. 4 is a flowchart of another audio signal output method according to an embodiment of the present application;

fig. 5 is a flowchart of another audio signal output method according to an embodiment of the present application;

Fig. 6 is a hardware architecture of an electronic device provided in an embodiment of the present application.

Detailed Description

In order to make the purposes, technical solutions and beneficial effects of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present application will be clearly and thoroughly described below with reference to the accompanying drawings. Wherein, in the description of the embodiments of the present application, "/" means or is meant unless otherwise indicated, for example, a/B may represent a or B; the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone.

The terms "first," "second," and the like, are used below for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature, and in the description of embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

In an audio signal output circuit provided herein, an intelligent power amplifier (Smart power amplifier, smart PA) is employed to amplify an audio signal. Referring specifically to fig. 1, fig. 1 illustrates an audio signal output circuit topology employing Smart PA.

As shown in fig. 1, the audio signal output circuit includes a power supply, an application processor (application processor, AP), smart PA (SPA). The power supply can output 4.4V power supply voltage to the Smart PA, and a Boost circuit (Boost circuit) is arranged in the Smart PA and is used for boosting the 4.4V voltage to a higher voltage so as to provide higher power for a driving circuit (H bridge) in the Smart PA, so that the driving circuit pushes a loudspeaker to output sound according to an audio signal input by the AP.

However, the following problems exist with the above method:

first, in common audio such as music, the energy of an audio signal is mainly concentrated in a low-frequency part, and a voltage amplitude and a current amplitude are large in a part with low frequency. Thus, for "bass rich" audio, which requires high power from the power supply, the power supply is required to supply a large current to the Smart PA, but this triggers the over-current protection (Over current protection, OCP) of the Boost circuit inside the Smart PA, so the Boost output voltage is limited. Resulting in the Smart PA not providing enough boost power for the speaker. In order to avoid the phenomenon of clipping distortion of the output audio signal, the amplitude compression is needed to be carried out on the low-frequency part, the dynamic range of the low-frequency part is narrowed, that is to say, the relative variation range of the audio signal intensity is narrowed, so that the loudspeaker cannot play back the original audio realistically, the signal playback of the low-frequency part is weaker, the signal playback of other frequencies is stronger, the audio output effect is poor, the fluctuation of the audio cannot be felt by a user, and the user hearing experience is reduced.

Second, when higher power is provided to the H-bridge in the Smart PA, the Boost circuit in the Smart PA needs to Boost the lower supply voltage to the higher voltage, which causes the voltage difference of the Boost circuit to be too large, and the power consumption is higher, thereby reducing the power efficiency. In addition, excessive power consumption causes the circuit board to heat, which further limits the power supply output current, resulting in further compression of the audio, which causes the problems described in the first aspect.

In order to solve the above problems, the present application provides an audio signal output method, a circuit and an electronic device. The method is applied to an audio output circuit, and the audio output circuit comprises: the device comprises a power supply module, a control module, a voltage regulating module, a power amplifier module and a loudspeaker. In the method, the power supply module can supply power to the control module, the voltage regulating module and the power amplifier module, so that the control module controls the voltage regulating module to work in different booster circuits according to the calculated amplitude of the audio signal to be played, and provides the adaptive input voltage for the power amplifier module, thereby driving the loudspeaker to output sound. The energy distribution of the audio frequency is mainly concentrated in the middle-low frequency part, the amplitude (voltage/current) of the low-frequency signal is large, and the compression of the low-frequency signal can be avoided by providing higher input voltage for the power amplification module, so that the dynamic range of the low-frequency part is improved, and the audio frequency output effect is optimized. In addition, the voltage regulating module is controlled to work in different circuits to provide the adaptive input voltage for the power amplifier module, so that the power consumption can be reduced, and the power efficiency can be improved.

Next, the audio signal output device 20 provided in the present application will be described with reference to a schematic diagram of the audio signal output device 20 shown in fig. 2.

As shown in fig. 2, the audio signal output apparatus 20 includes: a power supply module 21, a control module 23, a voltage regulation module 22, a power amplification module 24, a speaker 25, and the like. The power supply module 21, the voltage regulating module 22, the power amplifier module 24 and the loudspeaker 25 are sequentially connected in series, and the output end of the control module 23 is connected in series with the voltage regulating module 22. Wherein:

the power supply module 21 can output voltage to supply power to the control module 23, the voltage regulating module 22, the power amplifier module 24, etc., so that the speaker 25 converts the obtained electric energy into mechanical energy and emits sound.

The voltage regulation module 22 may be used to convert an input low voltage to a high voltage for output to the power amplifier module 24. The voltage regulating module 22 is composed of one or more circuits connected between the power supply module 21 and the power amplifier module 24, and the voltage output by the power supply can be regulated by the different circuits. Specifically, when the input voltage is constant, the voltage values output by the circuits are different, and the voltage output by any one of the circuits may be constant or may be a voltage value that varies within a certain range according to the modulation of the control module 23.

In the embodiment of the present application, the voltage regulating module 22 may include a first circuit, a second circuit, a third circuit, and so on, and the embodiment of the present application does not limit the number of circuits included in the voltage regulating module 22.

The control module 23 may output control signals and audio signals. The control module 23 can control the voltage regulating module 22 to operate in different circuits by control signals to output voltages of different values. Optionally, the control module 23 may also adjust the magnitude of the path voltage value in the voltage adjusting module 22 through a control signal. In other embodiments of the present application, the control signal may be generated and output by the control module 23, or may be generated and output by invoking another signal generating module, which is not limited in the embodiments of the present application.

Specifically, the control module 23 may determine the magnitude of the input power required by the power amplifier module 24 according to the calculated magnitude of the audio signal, and further determine the magnitude of the output voltage of the voltage regulator module 22. Then, the control module 23 may output a control signal to the voltage regulation module 22 to control the voltage regulation module 22 to output a corresponding voltage. The control signal includes an enable signal and a voltage regulation signal, where the enable signal is used to output to an enable input end of a corresponding circuit in the voltage regulation module 22, so that the voltage regulation module 22 works in the corresponding circuit; the voltage regulation signal is used to dynamically modulate the magnitude of a specific output voltage value of a circuit, such as a third circuit, in the voltage regulation module 22. The corresponding relation between the amplitude of the audio signal and the power required by the power amplifier module and the output voltage of the voltage regulating module can be referred to the detailed description, and is not repeated herein.

The control module 23 controls the voltage regulating module 22 to operate in different circuits to output voltages with different values according to the calculated amplitude (voltage/current) of the audio signal to be played, and specifically includes: before outputting the audio signal, the control module detects the amplitude of the audio signal in advance, determines the magnitude of the input power required by the power amplification module according to the amplitude of the audio signal, for example, divides the amplitude of the audio signal into small amplitude, medium amplitude, large amplitude or more grades, then the control module determines that the input power required by the power amplification module corresponds to the small power, medium power, large power or more grades respectively, and then the control module controls the voltage regulation module to work in the corresponding circuit according to the result obtained by judgment, so that the corresponding circuit outputs low voltage, medium voltage and high voltage respectively, and further the corresponding small power, medium power and large power can be provided for the power amplification module.

In the present embodiment, the control module 23 may be an application processor (application processor, AP).

The power amplifier module 24 is configured to receive the driving voltage provided by the voltage regulation module 22 and the audio signal provided by the control module 23, and drive the speaker to output a sound corresponding to the audio signal. The main operation principle of the power amplifier module 24 is to convert the power output by the power supply into a current that varies according to the input signal by using the current control function of the triode or the voltage control function of the field effect transistor. Because the sound is waves with different amplitudes and different frequencies, namely alternating current signal current, the collector current of the triode is always beta times of the base current in the amplifying region, and beta is the current amplifying coefficient of the triode. The power amplification is completed through continuous current amplification.

In embodiments of the present application, the power amplifier module 24 may include a class D amplifier, or other types of amplifiers, such as a class a amplifier, a class B amplifier, a class AB amplifier, or a class T amplifier, among others. The embodiments of the present application do not limit the amplifier employed by the power amplifier module 24.

The speaker 25, also referred to as a "horn," is a transducer element that converts the audio signal output by the power amplifier module 24 into an acoustic signal. Specifically, the power amplifier module 24 may input the amplified audio electric energy to the speaker 25, so that the speaker 25 may vibrate a cone or a diaphragm in the speaker 25 and generate resonance with surrounding air to generate sound through electromagnetic, piezoelectric or electrostatic effect, thereby completing the process of converting electric energy to mechanical energy to acoustic energy. Types of speakers 25 include cone speakers 25, flat speakers 25, dome speakers 25, horn speakers 25, ribbon tweeters 25, sheet speakers 25, and the like; the energy conversion working principle is classified into an electric type (namely a moving coil type), an electrostatic type (namely a capacitance type), an electromagnetic type (namely a reed type), a piezoelectric type (namely a crystal type) and the like. The specific type of speaker 25 is not limited by the embodiments of the present application.

It will be appreciated that the audio signal output device 20 shown in fig. 2 is merely an example. The audio signal output device 20 may include more or fewer modules, and each module included in the audio signal output device 20 may be separate or integrated in the same chip, for example, in some embodiments, the voltage regulating module 22 may be a separate electronic circuit, or may be integrated in the power supply module 21, the control module 23, or may also be integrated in the power amplifier module 24, which is not limited in this embodiment.

Next, one circuit implementation method of the audio signal output device 20 will be described based on the schematic diagram of the audio signal output device 20 shown in fig. 2.

Referring to fig. 3, fig. 3 illustrates a specific circuit topology of the audio signal output device 20 provided herein.

As shown in fig. 3, the power supply module 21 includes: a power supply 211. The voltage regulating module 22 includes: a charge pump 221, a switch 222, a switch 223, and a boost-type switching circuit 224. The control module 23 includes: and an AP231. The power amplifier module 24 includes: PA241. The power supply module 21, the voltage regulating module 22, the power amplifier module 24 and the loudspeaker 25 are sequentially connected in series, and the output end of the control module 23 is connected in series with the voltage regulating module 22.

It will be appreciated that the circuit components included in each of the above-described modules are merely examples, and that in other embodiments of the present application, each of the above-described modules may include more circuit components. For example, the power supply module may include a charge management module, a power management module, and the like in addition to the power supply 211. For another example, the voltage regulation module 22 may also include a plurality of charge pumps or switches, etc. For another example, the power amplifier module 24 may include a filter circuit or the like in addition to the PA241.

Next, the operation principle and the specific connection manner of the circuit components included in each module will be specifically described.

The power supply 211 in the power supply module 21 may be a nickel-cadmium battery, a nickel-hydrogen battery, or a lithium ion battery. In the embodiment of the present application, the power supply 211 may be configured by a plurality of batteries in series-parallel connection, in addition to the power supply, and the voltage output by the batteries is not limited to 4.4V, but may be other values. In one possible implementation, the power supply 211 may be an external power supply to the audio signal output device 20. The embodiment of the present application does not limit the type of the power supply 211 and the output voltage value.

The voltage regulation module 22 includes a plurality of circuits including: a first circuit, a second circuit, a third circuit, and the like. Wherein the first circuit comprises: and a switch 222. In the first circuit, one end of the switch 222 is connected to the output terminal of the power supply 211, and the other end of the switch 222 is connected to the power supply input terminal of the PA 241. The second circuit includes: a charge pump 221, a switch 223. In the second circuit, the input terminal of the charge pump 221 is connected to the output terminal of the power supply 211, the output terminal of the charge pump 221 is connected to one terminal of the switch 223, and the other terminal of the switch 223 is connected to the power supply input terminal of the PA 241. The second circuit includes: a charge pump 221, and a boost type switching circuit 224. In the third circuit, an input terminal of the charge pump 221 is connected to an output terminal of the power supply 211, an output terminal of the charge pump 221 is connected to an input terminal of the boost switching circuit 224, and an output terminal of the boost switching circuit 224 is connected to a power supply input terminal of the PA 241.

It will be appreciated that fig. 3 is only shown with the charge pump 221 included in the second and third circuits being the same, and in other embodiments, the charge pumps included in the second and third circuits may be different charge pumps.

It is understood that the above connection means all refer to electrical connection.

The charge pump 221 is referred to as a switched capacitor voltage converter, which is a DC-DC (converter) that uses a "fast" or "pumping" capacitor to store energy, typically with a charge pump efficiency of up to 98%. In this embodiment of the present application, the step-up ratio of the charge pump may be specifically determined according to the load (i.e. the power of the speaker), and when the load is larger, the step-up ratio of the charge pump is larger. For example, when the step-up ratio of the charge pump is 1:2, the ratio of the input voltage and the output voltage is 1:2, that is, when the power supply outputs a voltage of 4.4V, the output voltage of the charge pump is 8.8V in an ideal case; when the step-up ratio of the charge pump is 1:4, the ratio of the input voltage to the output voltage is 1:4, that is, when the power supply outputs a voltage of 4.4V, the output voltage of the charge pump is 17.6V in an ideal situation.

The switch 222 and the switch 223 are circuit elements for controlling the on or off of the circuit in which the switch is located, and when the switch node is "closed" (closed), the electronic node is turned on, allowing current to flow; an "open" switch indicates that the electronic node is not conducting and current is not allowed to flow. A specific implementation type of the switch 222 and the switch 223 may be a Load switch (Load switch), for example.

The boost switch circuit 224 is a circuit for controlling the on/off of the switch lock circuit and controlling the output voltage. A specific implementation form may be, for example, a Boost circuit. The Boost circuit can not only make the output voltage higher than the input voltage, but also control the output enable, namely control the Boost circuit to start the DC-DC function so as to output the voltage.

In the embodiment of the present application, the specific implementation type of the switch 222 and the switch 223 is a Load switch (Load switch), the specific implementation type of the Boost switch circuit 224 is an example of selecting a Boost circuit to serve as a power supply path, but the embodiment of the present application does not limit the switch types used by each circuit in the voltage regulation module.

In summary, the first circuit is connected in parallel to the second circuit and the third circuit, and these three circuits are connected in series between the power supply 211 and the PA 241. When the boost module works in the first circuit, the first circuit can realize that the power supply 211 is directly connected to the PA241 for supplying power; when the boost module works in the second circuit, the second circuit can boost the output voltage of the power supply 211 through the charge pump 221 and then supply power to the PA 241; when the boost module works in the third circuit, the third circuit can boost the output voltage of the battery through the charge pump 221, boost the voltage again through the boost switch circuit 224, and then supply power to the PA 241.

In the embodiment of the present application, when the voltage regulating module 22 operates in different circuits, the power efficiency is different, and in particular, reference may be made to the following description of table 1.

Referring to table 1, table 1 illustrates power efficiency of the voltage regulation module 22 when operating in different circuits.

As shown in the graph, when the operating circuit of the voltage regulating module 22 is the first circuit, the battery efficiency at this time is ideally as high as 100%, here the power consumption of the switch 1, i.e., the switch 222, is ignored. When the operating circuit of the voltage regulating module 22 is the second circuit, the battery efficiency is up to 98% at this time, because the efficiency of the charge pump can be up to 98%, and the power consumption of the switch 2, i.e. the switch 223, is also ignored. When the operating circuit of the voltage regulating module 22 is the third circuit, the battery efficiency is preferably 91%, because the efficiency of the charge pump is usually up to 98%, and the efficiency of the Boost circuit is usually up to 93%, so the total efficiency of the third circuit is up to 91%. It will be appreciated that the efficiencies described above may be obtained based on conventional theoretical or experimental data in the art, and that the embodiments of the present application are not limited in this regard.

TABLE 1

Working circuit	Power efficiency (output power/input power)
		First circuit	100％
Second circuit	98％
		Third circuit	91％

The control module 23 may include: an application processor (application processor, AP) 231. In the embodiment of the present application, the AP231 is a very large scale integrated circuit that expands the audio and video functions and dedicated interfaces on the basis of a low power CPU. The AP231 is a number of chips developed for application processing platforms, and these chips are mainly used for being mounted on electronic products with various product forms, and then form a set of solutions. By employing a modular AP architecture, multimedia function applications that once occupy too much of the electronic device CPU resources can be executed on the AP 231.

In the embodiment of the present application, the AP may be connected to the audio interface of the PA241 through the audio bus, and the embodiment of the present application does not limit the types of the audio bus, the audio interface, and the protocol of audio data transmission, etc. For example, the present application is described using an integrated circuit built-in audio (I2S) bus, and an I2S audio interface.

In this embodiment of the present application, the AP may further access the enable input ends of the switch 222, the switch 223 and the boost switch circuit 224 in the first circuit, the second circuit and the third circuit through different pins, so that after the AP determines the power required by Smart PA according to the calculated amplitude of the audio signal to be played, the AP determines the output voltage of the voltage regulating module 22, and may control the pins corresponding to the AP to send enable signals EN1, EN2 and EN3 to the enable input ends in the switch 222, the switch 223 or the boost switch circuit 224, which respectively serve as circuit selection roles, in the three circuits in the voltage regulating module 22, so as to enable the corresponding circuits, and the corresponding circuits may output corresponding voltages, thereby providing the PA241 with adapted input power. Specifically, when the calculated audio signal amplitude is respectively a small amplitude, a medium amplitude, a large amplitude or more, the AP determines that the input power required by the PA241 corresponds to the small power, the medium power, the large power or more, and then, according to the result obtained by the determination, the AP controls the voltage regulating module 22 to operate in the corresponding first circuit, the second circuit or the third circuit, so that the corresponding first circuit outputs a low voltage, the second circuit outputs a medium voltage, and the third circuit outputs a high voltage, and further, the PA241 can be provided with the corresponding small power, medium power, and large power. In this way, the AP may provide the PA241 with a suitable voltage according to the output sound of the speaker, so that it has enough driving force to push the speaker to generate, thereby saving unnecessary power consumption.

In this embodiment of the present application, the AP may control the third circuit path in addition to inputting the enable signal EN3 to the Boost circuit in the third circuit, and the AP may also input the voltage regulation signal to the Boost circuit, because the Boost circuit is used as a switch-type Boost circuit, and may dynamically regulate the output voltage of the third circuit according to the voltage regulation signal input by the AP.

In other embodiments of the present application, after the AP outputs the voltage adjustment signal to the Boost circuit in the third circuit, the third circuit may be turned on to operate, and dynamically adjust the output voltage of the third circuit according to the voltage adjustment signal. The voltage regulation signal may be realized, for example, by means of pulse width modulation (Pulse width modulation, PWM). When the PWM duty cycle is 0, the third circuit is turned off, when the PWM is non-zero 0, the third circuit is turned on, and the AP may change the width or duty cycle of the pulse according to the amplitude variation of the audio signal, and when the amplitude of the audio signal is larger, the PWM duty cycle is controlled to be larger, the third circuit output voltage is larger. The purposes of selecting the third circuit to work and adjusting the voltage of the third circuit are achieved through a control signal, namely a voltage adjusting signal.

In a specific embodiment, taking the power output voltage of 4.4V as an example, when the step-up ratio of the charge pump is 1:2, the output voltage of the third circuit may be about 8.8V-15V. Where 8.8V is the minimum voltage output by the third circuit and 15V is the maximum voltage output by the third circuit while taking into account the power efficiency (e.g., 93%) of the boost circuit.

In other embodiments of the present application, the AP may further control an internal register of the AP through a data bus, and further control an output voltage of the digital-to-analog converter (Digital to Analog Convertor, DAC) to achieve the voltage regulation effect.

The power amplifier module 24 may include: PA241. The signal input end of the power amplifier is connected with the AP through an audio bus, and the power input end of the AP is connected with the output ends of the first circuit, the second circuit and the third circuit. The output of the AP is connected to a speaker 25.

In the embodiment of the present application, PA241 may be a class a amplifier, a class B amplifier, a class AB amplifier, a class T amplifier, or the like. The PA241 may be an existing Smart power amplifier (Smart power amplifier, smart PA), or may be a modification of an existing Smart PA, or a new power amplifier may be developed. The embodiments of the present application do not limit the amplifier employed by the power amplifier module 24.

Notably, when the PA241 is a Smart PA, or is a modification of a Smart PA, it is in addition to being able to output more power than the input, pushing a load such as a speaker to sound. The biggest difference compared with the common PA is that a feedback function is added, that is, smart PA can feedback information to AP231, where the feedback information may include any one or more of the following: the output power, output voltage or output current of the power amplifier. The main principle is to model the performance parameters of the loudspeaker and monitor the voltage/current feedback of the loudspeaker, so that the working state and the behavior mode of the loudspeaker under the input audio signal are predicted through a software algorithm, the algorithm output is dynamically adjusted, the loudspeaker is driven, and the loudspeaker is ensured to work under the maximum stroke and the maximum average power for a long time under the premise of ensuring the safety range. For some sounds (low-frequency sounds) with larger dynamic range, such as drum sound, gun sound and the like, the dynamic range of the frequency response reaches more than 80dB, and Smart PA can monitor the actual stroke of the loudspeaker, so that the compression ratio of audio signals is controlled in real time, the stroke range of the loudspeaker is used to the maximum extent, and the dynamic range and the bass effect which cannot be achieved by the traditional loudspeaker are achieved.

The speaker 25, also called a "horn", is a transducer element that converts the audio signal output by the power amplifier module 24 into an acoustic signal. For a specific description of the speaker, reference is made to the description of the speaker in fig. 2, and the description is omitted here.

It will be understood that, the components included in the topology diagram of the audio signal output circuit shown in fig. 3 are only examples, the embodiments of the present application do not limit the types of the components, and the operating parameters, such as the operating voltage, of the components are only examples, and fig. 3 only uses the electronic device mounted on the audio signal output circuit as an example of a mobile phone to show the operating parameters of the components. When the electronic device is a notebook, a calculator, or the like, the operating parameters of each component shown in fig. 3 may be changed, and the model of each component may be changed, but the basic functions of each component and the connection mode of the circuit are not changed.

Based on the above description of the topology of the audio signal output circuit, the flow of the audio signal output method provided by the application is described next.

As shown in fig. 4, the method specifically includes the following steps:

s401, the control module calculates the amplitude of the audio signal to be played, and determines the voltage A output by the voltage regulating module.

First, several methods are described in which the control module 23 obtains the audio signal to be played before calculating the amplitude of the audio signal to be played:

in some embodiments of the present application, after the control module 23 detects a play option for triggering playing of an audio/video file, for example, clicking a corresponding play option of the audio/video file, the control module 23 may obtain relevant information of the corresponding audio/video file to be played from the memory, and temporarily store the audio/video file to be played.

In other embodiments of the present application, when the control module 23 detects an operation for answering a call, for example, clicking on an answer option corresponding to an answer call control, the control module 23 may obtain a corresponding audio signal from the communication module and temporarily store the audio signal.

In other embodiments of the present application, the control module 23 does not need to receive a user operation, for example, when detecting incoming call notification information or a reminder of an event to be handled added such as a memo, an alarm clock, a calendar, etc., may obtain an audio signal corresponding to the ringing music from the memory, and temporarily store the audio and video signal to be played.

Then, the control module 23 may send the obtained audio signal to be played to the power amplifier module, and calculate the amplitude of the audio signal to be played in real time to determine the voltage a output by the voltage regulating module. The amplitude of the audio signal herein refers to a voltage value or a current value of the audio signal that varies in real time.

Referring to fig. 5, fig. 5 illustrates another audio signal output method flowchart provided. The flowchart of fig. 5 shows a method flow of controlling the voltage regulating module to output the voltage a after the control module determines the voltage a output by the voltage regulating module according to the calculation result of the audio signal amplitude.

As shown in fig. 5, the control module may determine the level of the amplitude of the audio signal to be played after calculating the amplitude of the signal. In the embodiment of the present application, the amplitude of the audio signal may be classified into a small amplitude, a medium amplitude, a large amplitude or more, and then the control module 23 may determine the power required by the power amplifier module 24 corresponding to the different amplitudes. For example, a small amplitude corresponds to a small power, a medium amplitude corresponds to a medium power, and a large amplitude corresponds to a large power. Further, the control module 23 may determine the level of the voltage a that should be output by the voltage regulation module corresponding to the power of different levels. For example, the voltage a corresponding to the low power is a low voltage, that is, a voltage output when the first circuit is in the first circuit, the voltage a corresponding to the medium power is a medium voltage, that is, a voltage output when the second circuit is in the second circuit, and the voltage a corresponding to the high power is a high voltage, that is, a voltage output when the third circuit is in the third circuit.

It will be appreciated that the control module 23 may not calculate the amplitude of the audio signal to be played when the audio is not played for the first time, that is, the control module 23 may store the calculated amplitude of the audio signal when the audio is played for the first time, and may directly obtain the result obtained by previous calculation when the control module 23 detects that the audio is played again.

S402, the control module controls the voltage regulating module to work in the circuit A so as to output an electric signal of the voltage A to the power amplification module

Specifically, after determining the output voltage a of the voltage regulating module, the control module 23 inputs control signals to a plurality of circuits of the voltage regulating module to control the voltage regulating module to operate in the corresponding circuit, so that the output voltage a of the corresponding circuit is obtained.

With continued reference to fig. 5, when the control module determines that the voltage a is low voltage, the control module sends an enable signal EN1 to the first circuit in the voltage regulation module to control the first circuit in the voltage regulation module to work, so as to output an electrical signal with the voltage a being low voltage to provide corresponding low power for the power amplifier. When the control module determines that the voltage A is medium voltage, the control module sends an enable signal EN2 to a second circuit in the voltage regulating module to control the second circuit in the voltage regulating module to work, so that the output voltage A is an electric signal of medium voltage to provide corresponding medium power for the power amplifier. When the control module determines that the voltage A is high voltage, the control module sends an enable signal EN3 to a third circuit in the voltage regulating module to control the third circuit in the voltage regulating module to work, so that the control module outputs an electric signal with the voltage A being high voltage to provide corresponding high power for the power amplifier.

It should be noted that, when the control module 23 controls the voltage regulating module to operate in the third circuit, the control module 23 may further send a voltage regulating signal to the third circuit according to the amplitude of the audio signal to be played calculated in real time, dynamically regulate the output voltage value of the third circuit, and further provide the power amplifier with the adapted power. This is because, in a general music signal, its low frequency component is large, accounting for about 70% of the entire music signal. In order to achieve both the power efficiency and the low-frequency output effect, the power corresponding to the low-frequency signal with a large amplitude can be further divided, that is, when the control module detects that the amplitude of the audio signal is a large signal and controls the voltage regulating module to work in the third circuit, the large-amplitude signal can be further calculated, the finer amplitude level is divided, for example, the large-amplitude signal is divided into a large amplitude, a super-large amplitude or more level, then the voltage regulating signal is input into the Boost circuit in the third circuit, and the third circuit is controlled to output the corresponding large voltage and the super-large voltage or more level voltage.

The enable signal EN3 for controlling the operation of the third circuit and the voltage regulating signal for regulating the voltage of the third circuit may be the same control signal, i.e., PWM signal, described above, which is not described herein again.

It will be appreciated that, when the control module 23 uses the independent enable signal EN3 to control the voltage regulating module to operate in the third circuit, and the third circuit outputs the voltage with the minimum voltage or the maximum voltage or other voltage when the independent voltage regulating signal is not yet output to the third circuit, the embodiment of the present application is not limited thereto. When the third circuit defaults to output the minimum voltage, the power supply efficiency can be improved, and when the third circuit defaults to output the maximum voltage, the sound dynamic range corresponding to the output low-frequency signal can be large, and the sound dynamic range is very rich in the representation of the bass effect.

S403, the power amplification module drives the loudspeaker to output sound corresponding to the audio signal.

Specifically, after the power amplifier receives the electric signal of the voltage value corresponding to the voltage value provided by the voltage regulating module, the power amplifier can drive the loudspeaker to convert the audio electric signal into mechanical energy so as to output corresponding sound.

It should be noted that, in other embodiments of the present application, in order to reduce the delay of audio output, that is, to respond to the user input for playing audio quickly, the control module 23 detects the operation of triggering the audio output device to play the audio/video file, or to answer the call, etc. The voltage regulating module 22 may operate in any one of the first circuit, the second circuit or the third circuit by default, so that the speaker may output the sound corresponding to the audio as soon as possible, and after the entire audio output circuit is stable, perform the amplitude calculation on the audio in real time, determine the power corresponding to the amplitude, and continue to the steps S401 to S403 described above.

In summary, after implementing the audio signal output circuit and the audio signal output method provided by the application, the electronic device applying the audio signal output circuit can control the corresponding circuit in the voltage regulating module to work according to the amplitude of the audio signal, so that the power supply of the electronic device outputs the corresponding voltage through the voltage regulating module, and further provides the adaptive power for the power amplifier module. That is, a large power is supplied to a large amplitude signal in a low frequency part, and a small power is supplied to a small amplitude signal in a high frequency part. For the scene of middle and low power (for example, the scene that the output of the boosting module is smaller than 8.8V), the power efficiency is improved by 5% through experimental measurement. For a high-power scene (for example, a scene that the output of the boosting module is larger than 8.8V), the power efficiency is improved by 1% through experimental measurement. And further improves the comprehensive efficiency of the power supply and reduces the power consumption of the power supply. In addition, when the low-frequency part is output, the booster module is controlled to provide high power for the power amplifier, so that the excessive compression of the low-frequency signal is avoided, the frequency of the low-frequency compression point is reduced, the dynamic range of the low-frequency part is improved, and the audio output effect is optimized. The output sound is very intense in the representation of the bass effect, and the sound is clearly, fully and shockingly transmitted into the ears of the user and has a deep hearing experience.

Based on the above description of the audio signal output method and circuit provided in the present application, the audio signal output method, the form of the electronic device to which the circuit is applied, the hardware architecture, and the like are specifically described next.

In an embodiment of the present application, an electronic device to which the above audio signal output method and circuit may be applied includes: a cell phone, tablet, desktop, laptop, handheld, notebook, ultra-mobile personal computer (ultra-mobile personal computer, UMPC), netbook, and cellular telephone, personal digital assistant (personal digital assistant, PDA), augmented reality (augmented reality, AR) device, virtual Reality (VR) device, artificial intelligence (artificial intelligence, AI) device, wearable device, vehicle-mounted device, smart home device, and/or smart city device, among others. The embodiments of the present application are not limited in this regard.

Referring to fig. 6, fig. 6 illustrates an electronic device hardware architecture provided by the present application.

As shown in fig. 6, the electronic device includes: processor 101, memory 102, power module 103 and audio module 104, display screen 105, mobile communication module 106, wireless communication module 107. In an embodiment of the present application, the audio module may include: voltage regulation module power amplifiers, speakers, etc. The plurality of portions may transmit data over a bus. The circuit connection between the power supply module and the audio module can be referred to the connection method shown in fig. 3 above, and will not be described in detail here. Wherein:

The processor 101 may include one or more processing units, such as: the processor 101 may include an application processor (application processor, AP), a modem processor, a controller, a memory, an audio codec, a digital signal processor (digital signal processor, DSP), and/or a baseband processor, etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors. The controller can generate operation control signals according to the instruction operation codes and the time sequence signals to finish the control of instruction fetching and instruction execution.

In this embodiment of the present application, the AP may output a control signal and an audio signal, and may determine, according to the calculated amplitude of the audio signal, the magnitude of the input power required by the power amplifier, and thus determine the magnitude of the output voltage of the voltage regulation module. Then, the AP may output a control signal to the voltage regulation module to control the voltage regulation module to output a corresponding voltage. The control signal comprises an enabling signal and a voltage regulating signal, wherein the enabling signal is used for being output to an enabling input end of a corresponding circuit in the voltage regulating module, so that the voltage regulating module works in the corresponding circuit; the output voltages of different circuits are different. The voltage regulating signal is used for modulating the specific output voltage value of a certain circuit in the voltage regulating module. For the correspondence between the amplitude of the audio signal and the power required by the power amplifier and the magnitude of the output voltage of the voltage regulating module, reference is made to the foregoing detailed description, which is not repeated herein.

In this embodiment of the present application, the audio codec may output the decoded audio signal to the power amplifier, and the power amplifier may send the amplified audio signal to the speaker to output sound.

A memory may also be provided in the processor 101 for storing instructions and data. In some embodiments, the memory in the processor 101 is a cache memory. The memory may hold instructions or data that has just been used or recycled by the processor 101. If the processor 101 needs to reuse the instruction or data, it may be called directly from the memory. Repeated accesses are avoided and the latency of the processor 101 is reduced, thus improving the efficiency of the system.

In some embodiments, the processor 101 may include one or more interfaces. The interfaces may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous receiver transmitter (universal asynchronous receiver/transmitter, UART) interface, a mobile industry processor interface (mobile industry processor interface, MIPI), a general-purpose input/output (GPIO) interface, a subscriber identity module (subscriber identity module, SIM) interface, and/or a universal serial bus (universal serial bus, USB) interface, among others.

The I2C interface is a bi-directional synchronous serial bus comprising a serial data line (SDA) and a serial clock line (derail clock line, SCL). In some embodiments, the processor 101 may contain multiple sets of I2C buses. The processor 101 may be coupled to a touch sensor, charger, flash, camera, etc., respectively, through different I2C bus interfaces. For example: the processor 101 may be coupled to the touch sensor through an I2C interface, such that the processor 101 communicates with the touch sensor through an I2C bus interface to implement a touch function of the electronic device 100.

The I2S interface may be used for audio communication. In some embodiments, the processor 101 may contain multiple sets of I2S buses. The processor 101 may be coupled to the audio module via an I2S bus to enable communication between the processor 101 and the audio module.

In the embodiment of the present application, the AP in the processor 101 may output an audio signal to the audio module through the I2S bus.

PCM interfaces may also be used for audio communication to sample, quantize and encode analog signals. In some embodiments, the audio module and the wireless communication module may be coupled through a PCM bus interface. In some embodiments, the audio module may also transmit an audio signal to the wireless communication module through the PCM interface to implement a call answering function. Both the I2S interface and the PCM interface may be used for audio communication.

The USB interface is an interface conforming to the USB standard specification, and can be specifically a Mini USB interface, a Micro USB interface, a USB Type C interface and the like. The USB interface can be used for connecting a charger to charge the electronic equipment and can also be used for transmitting data between the electronic equipment and the peripheral equipment. But also for connecting to an external memory or the like.

It should be understood that the connection relationship between the modules illustrated in the embodiments of the present application is only illustrative, and does not limit the structure of the electronic device. In other embodiments of the present application, the electronic device may also use different interfacing manners in the foregoing embodiments, or a combination of multiple interfacing manners.

The memory 102 may be an internal memory of the electronic device or an external memory to which the electronic device is connected, where the internal memory may include one or more random access memories (random access memory, RAM) and one or more non-volatile memories (NVM). In embodiments of the present application, the NVM may store information of an area reached by a user and a residence time in the area.

The random access memory may include a static random-access memory (SRAM), a dynamic random-access memory (dynamic random access memory, DRAM), a synchronous dynamic random-access memory (synchronous dynamic random access memory, SDRAM), a double data rate synchronous dynamic random-access memory (double data rate synchronous dynamic random access memory, DDR SDRAM, such as fifth generation DDR SDRAM is commonly referred to as DDR5 SDRAM), etc.;

The nonvolatile memory may include a disk storage device, a flash memory (flash memory).

The FLASH memory may include NOR FLASH, NAND FLASH, 3D NAND FLASH, etc. divided according to an operation principle, may include single-level memory cells (SLC), multi-level memory cells (MLC), triple-level memory cells (TLC), quad-level memory cells (QLC), etc. divided according to a storage specification, may include universal FLASH memory (english: universal FLASH storage, UFS), embedded multimedia memory cards (embedded multi media Card, eMMC), etc. divided according to a storage specification.

The random access memory may be read directly from and written to by the processor 101, may be used to store executable programs (e.g., machine instructions) for an operating system or other on-the-fly programs, may also be used to store data for users and applications, and the like.

The nonvolatile memory may store executable programs, store data of users and applications, and the like, and may be loaded into the random access memory in advance for the processor 101 to directly read and write.

The external memory interface may be used to connect to an external non-volatile memory to enable expansion of the memory capabilities of the electronic device. The external nonvolatile memory communicates with the processor 101 through an external memory interface to realize a data storage function. For example, files such as music and video are stored in an external nonvolatile memory.

In this embodiment of the present application, the memory may be used to store an audio file corresponding to an audio signal to be output. The AP in the electronic device may obtain the audio file and invoke the audio module 104 to output a corresponding sound.

In other embodiments of the present application, the memory may be further configured to store an amplitude of an audio signal, where the amplitude of the audio signal is calculated by the AP when a piece of audio (audio file) is first played. When the AP in the electronic device detects that the audio is played again, the amplitude of the audio signal calculated at the time of first playing can be directly called from the memory. The power supply module 103 may specifically include: a charging management module and a power management module; the charge management module is to receive a charge input from a charger. The charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module may receive a charging input of the wired charger through the USB interface. In some wireless charging embodiments, the charging management module may receive wireless charging input through a wireless charging coil of the electronic device. The charging management module can also supply power to the electronic equipment through the power management module while charging the battery. The power management module is used to connect the battery, the charge management module and the processor 101. The power management module receives inputs from the battery and/or charge management module and provides power to the processor 101, memory 102, audio module, etc. The power management module can also be used for monitoring parameters such as battery capacity, battery cycle times, battery health status (leakage, impedance) and the like. In other embodiments, a power management module may also be provided in the processor 101. In other embodiments, the power management module and the charge management module may be disposed in the same device.

In the embodiment of the present application, the power supply module 103 may be a power source with an output voltage of 4.4V as shown in fig. 3, or may be a serial-parallel connection structure of a greater number of batteries, or may be a battery that outputs a voltage with another value.

The audio module 104 is used to convert digital audio information into an analog audio signal output and also to convert an analog audio input into a digital audio signal. The audio module may also be used to encode and decode audio signals. In some embodiments, the audio module may be disposed in the processor 101, or a portion of the functional modules of the audio module may be disposed in the processor 101.

In this embodiment of the present application, the voltage regulation module in the audio module 104 may receive the control signal input by the AP, control the corresponding circuit in the audio module 104 to work, and input the corresponding power to the power amplifier, so that the power amplifier drives the speaker to output the sound corresponding to the audio signal according to the audio signal input by the AP.

The display screen 105 is used to display images, videos, and the like. The display screen 105 includes a display panel. The display panel may employ a liquid crystal display (liquid crystal display, LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED) or an active-matrix organic light-emitting diode (matrix organic light emitting diode), a flexible light-emitting diode (flex), a mini, a Micro led, a Micro-OLED, a quantum dot light-emitting diode (quantum dot light emitting diodes, QLED), or the like. In some embodiments, the electronic device may include 1 or N display screens 105, N being a positive integer greater than 1.

In the embodiment of the present application, the display screen 105 may be used to display options corresponding to the audio and video files, or other controls for triggering the electronic device to play the audio and video files, and so on. The electronic device may detect a user's action on a control displayed in the display screen 105 for triggering the electronic device to play an audiovisual file.

The mobile communication module 106 may provide a solution for wireless communication including 2G/3G/4G/5G, etc. applied on an electronic device. The mobile communication module 106 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA), etc. The mobile communication module 106 may receive electromagnetic waves from the antenna 1, filter, amplify, and the like the received electromagnetic waves, and transmit the electromagnetic waves to the modem processor for demodulation. The mobile communication module 106 can amplify the signal modulated by the modem processor, and convert the signal into electromagnetic waves through the antenna 1 to radiate. In some embodiments, at least some of the functional modules of the mobile communication module 106 may be provided in the processor 101. In some embodiments, at least some of the functional modules of the mobile communication module 106 may be provided in the same device as at least some of the modules of the processor 101.

The modem processor may include a modulator and a demodulator. The modulator is used for modulating the low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used for demodulating the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low frequency baseband signal to the baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and then transferred to the application processor. The application processor outputs sound signals through an audio device (not limited to speakers) or displays images or video through the display screen 105. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be provided in the same device as the mobile communication module 106 or other functional module, independent of the processor 101.

The wireless communication module 107 may provide solutions for wireless communication including wireless local area network (wireless local area networks, WLAN) (e.g., wireless fidelity (wireless fidelity, wi-Fi) network), bluetooth (BT), global navigation satellite system (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field wireless communication technology (near field communication, NFC), infrared technology (IR), etc. for application on an electronic device. The wireless communication module 107 may be one or more devices that integrate at least one communication processing module. The wireless communication module 107 receives electromagnetic waves via the antenna 2, modulates the electromagnetic wave signals, filters the electromagnetic wave signals, and transmits the processed signals to the processor 101. The wireless communication module 107 may also receive a signal to be transmitted from the processor 101, frequency modulate it, amplify it, and convert it into electromagnetic waves for radiation via the antenna 2.

In this embodiment of the present application, the processor of the electronic device may invoke the mobile communication module 106 or the wireless communication module 107 to connect to a server, so as to obtain an audio/video file, and further invoke the audio module 104 to output a corresponding sound.

It will be appreciated that the structure of the electronic device illustrated in fig. 6 does not constitute a specific limitation on the electronic device. In other embodiments of the present application, the electronic device may include more or less components than illustrated, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The embodiments of the present application may be arbitrarily combined to achieve different technical effects.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk), etc.

Those of ordinary skill in the art will appreciate that implementing all or part of the above-described method embodiments may be accomplished by a computer program to instruct related hardware, the program may be stored in a computer readable storage medium, and the program may include the above-described method embodiments when executed. And the aforementioned storage medium includes: ROM or random access memory RAM, magnetic or optical disk, etc.

In summary, the foregoing description is only exemplary embodiments of the present invention and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made according to the disclosure of the present invention should be included in the protection scope of the present invention.

The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An audio signal output circuit, comprising: the device comprises a voltage regulating module, a control module, a power amplifier module and a loudspeaker; the control module is electrically connected with the voltage regulating module, the control module is also electrically connected with the power amplification module, the voltage regulating module is electrically connected with the power amplification module, and the power amplification module is electrically connected with the loudspeaker;

the voltage regulating module is used for receiving a first power supply voltage provided by a power supply;

the control module is used for sending an audio signal to the power amplification module and controlling the voltage regulation module to regulate the first power supply voltage to a second power supply voltage according to the amplitude of the audio signal;

the voltage regulating module is further used for outputting the second power supply voltage to the power amplifier module;

the power amplification module is used for amplifying the audio signal and then sending the amplified audio signal to the loudspeaker under the drive of the second power supply voltage;

the loudspeaker is used for converting the amplified audio signal into sound.

2. The audio signal output circuit of claim 1, wherein the voltage regulation module comprises a first circuit, a second circuit, and a third circuit; wherein,

The first circuit is used for adjusting the first power supply voltage to the second power supply voltage with a first value;

the second circuit is used for adjusting the first power supply voltage to the second power supply voltage with a second value;

the third circuit is used for adjusting the first power supply voltage to the second power supply voltage in a first value range;

the first value is smaller than the second value, and the second value is smaller than the minimum value in the first value range.

3. The audio signal output circuit according to claim 2, wherein the control module is configured to send an audio signal to the power amplifier module, and control the voltage regulator module to adjust the first supply voltage to a second supply voltage according to an amplitude of the audio signal, and specifically comprises:

when the amplitude of the audio signal is smaller than the first preset amplitude, the control module sends a first enabling signal to the first circuit; the first circuit is used for outputting the second power supply voltage of the first value to the power amplifier module after receiving the first enabling signal;

when the amplitude of the audio signal is smaller than or equal to a second preset amplitude and larger than the first preset amplitude, the control module sends a second enabling signal to the second circuit; the second circuit is configured to output the second supply voltage of the second value to the power amplifier module after receiving the second enable signal.

4. The audio signal output circuit according to claim 3, wherein the control module is configured to send an audio signal to the power amplifier module, and control the voltage regulator module to adjust the first supply voltage to the second supply voltage according to an amplitude of the audio signal, and specifically comprises:

when the amplitude of the audio signal is larger than the second preset amplitude, the control module sends a first voltage regulating signal to the third circuit; the first voltage regulating signal is used for regulating the value of the second power supply voltage output by the third circuit to a third value, and the third value is in the first value range;

and the third circuit is used for outputting the second power supply voltage with the third value after receiving the first voltage regulating signal.

5. The audio signal output circuit of claim 4, wherein the control module is further configured to:

when the amplitude of the audio signal is larger than the second preset amplitude, a third enabling signal is sent to the third circuit; the third enabling signal is used for triggering the third circuit to output the second power supply voltage;

the third circuit is configured to output the second supply voltage of the third value after receiving the third enable signal and the first voltage regulation signal.

6. The audio signal output circuit according to claim 4 or 5, wherein the first value is equal to a value of the first supply voltage; the second value is equal to twice the value of the first supply voltage; the third value is greater than the second value.

7. The audio signal output circuit of any one of claims 4-6, wherein the first circuit includes a first switch for receiving the first enable signal such that the first circuit outputs the second supply voltage of the first value to the power amplifier module;

the second circuit comprises a first charge pump and a second switch, and the first charge pump is electrically connected with the second switch; the first charge pump is used for receiving the first power supply voltage;

the second switch is configured to receive the second enable signal, so that the second circuit outputs the second supply voltage of the second value to the power amplifier module.

8. The audio signal output circuit of claim 7, wherein the third circuit comprises a second charge pump and a third boost-type switching circuit, the second charge pump being electrically connected to the third boost-type switching circuit; the second charge pump is used for receiving the first power supply voltage; wherein,

The third boost type switch circuit is used for outputting the second power supply voltage of the third value after receiving the first voltage regulating signal;

or ,

the third boost switch circuit is configured to output the second supply voltage of the third value after receiving the first voltage regulation signal and the third enable signal.

9. The audio signal output circuit of claim 8, wherein the first charge pump and the second charge pump are the same charge pump or are different charge pumps.

10. The audio signal output circuit of claim 9, wherein the first charge pump boost ratio is a first ratio, the first charge pump being configured to adjust the value of the first supply voltage to a second supply voltage of the first value;

when the second charge pump is different from the first charge pump, the boosting ratio of the second charge pump is a second ratio; the first ratio is different from the second ratio.

11. An audio signal output method, wherein the method is applied to an audio signal output circuit, the audio signal output circuit comprising: the device comprises a voltage regulating module, a control module, a power amplifier module and a loudspeaker; the control module is electrically connected with the voltage regulating module, the control module is also electrically connected with the power amplification module, the voltage regulating module is electrically connected with the power amplification module, and the power amplification module is electrically connected with the loudspeaker;

The method comprises the following steps:

the voltage regulating module receives a first power supply voltage provided by a power supply;

the control module sends an audio signal to the power amplification module, and controls the voltage regulation module to regulate the first power supply voltage to a second power supply voltage according to the amplitude of the audio signal;

the voltage regulating module outputs the second power supply voltage to the power amplifier module;

the power amplification module amplifies the audio signal and sends the amplified audio signal to the loudspeaker under the drive of the second power supply voltage;

the speaker converts the amplified audio signal into sound.

12. The audio signal output method according to claim 11, wherein the voltage regulating module includes a first circuit, a second circuit, and a third circuit; wherein,

13. The audio signal output method according to claim 12, wherein the control module controls the voltage regulating module to regulate the first supply voltage to the second supply voltage according to the amplitude of the audio signal, specifically comprising:

when the amplitude of the audio signal is smaller than the first preset amplitude, the control module sends a first enabling signal to the first circuit; the first circuit receives the first enabling signal and then outputs the second power supply voltage with the first value to the power amplifier module;

when the amplitude of the audio signal is smaller than or equal to a second preset amplitude and larger than the first preset amplitude, the control module sends a second enabling signal to the second circuit; and the second circuit outputs the second power supply voltage with the second value to the power amplifier module after receiving the second enabling signal.

14. The audio signal output method according to claim 13, wherein the control module controls the voltage regulating module to regulate the first supply voltage to the second supply voltage according to the amplitude of the audio signal, specifically comprising:

when the amplitude of the audio signal is larger than the second preset amplitude, the control module sends a first voltage regulating signal to the third circuit; the third circuit receives the first voltage regulating signal and then outputs the second power supply voltage with the third value;

The first voltage regulating signal is used for regulating the value of the second power supply voltage output by the third circuit to a third value, and the third value is in the first value range.

15. The audio signal output method according to claim 14, wherein the control module controls the voltage regulating module to regulate the first supply voltage to the second supply voltage according to the amplitude of the audio signal, specifically comprising:

when the amplitude of the audio signal is larger than the second preset amplitude, the control module also sends a third enabling signal to the third circuit; the third enabling signal is used for triggering the third circuit to output the second power supply voltage;

and the third circuit outputs the second power supply voltage with the third value after receiving the third enabling signal and the first voltage regulating signal.

16. The audio signal output method according to claim 14 or 15, wherein the first value is equal to a value of the first power supply voltage; the second value is equal to twice the value of the first supply voltage; the third value is greater than the second value.

17. The audio signal output method according to any one of claims 14 to 16, wherein the first circuit includes a first switch, the second circuit includes a first charge pump and a second switch, and the first charge pump is electrically connected to the second switch; the first charge pump is used for receiving the first power supply voltage;

The first circuit outputs the second power supply voltage of the first value to the power amplifier module after receiving the first enabling signal, and specifically includes: the first switch receives the first enabling signal, so that the first circuit outputs the second power supply voltage with the first value to the power amplification module;

the second circuit outputs the second power supply voltage of the second value to the power amplifier module after receiving the second enabling signal, and specifically includes: the second switch is configured to receive the second enable signal, so that the second circuit outputs the second supply voltage of the second value to the power amplifier module.

18. The audio signal output method according to claim 17, wherein the third circuit includes a second charge pump and a third boost type switching circuit, the second charge pump being electrically connected to the third boost type switching circuit; the second charge pump is used for receiving the first power supply voltage;

the outputting, by the third circuit, the second power supply voltage of the third value after receiving the first voltage regulation signal specifically includes:

the third boost type switch circuit receives the first voltage regulating signal and then outputs the second power supply voltage with the third value;

or ,

and the third boost type switch circuit outputs the second power supply voltage with the third value after receiving the first voltage regulating signal and the third enabling signal.

19. The audio signal output method of claim 18, wherein the first charge pump and the second charge pump are the same charge pump or are different charge pumps.

20. The audio signal output method according to claim 19, wherein the first charge pump boost ratio is a first ratio, and the first charge pump is configured to adjust a value of the first supply voltage to a second supply voltage of the first value;

21. A chip for application to an audio signal output circuit, the chip comprising one or more processors to invoke computer instructions to cause the audio signal output circuit to perform the method of any of claims 11-20.

22. A computer readable storage medium comprising instructions which, when run on an audio signal output circuit, cause the electronic device to perform the method of any of claims 11-20.

23. An electronic device comprising one or more processors and one or more memories; wherein the one or more memories are coupled to the one or more processors, the one or more memories for storing computer program code comprising computer instructions that, when executed by the one or more processors, cause the electronic device to perform the method of any of claims 11-20.