CN116723451B - Playback power supply control circuit and control method - Google Patents
Playback power supply control circuit and control method Download PDFInfo
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- CN116723451B CN116723451B CN202311000933.6A CN202311000933A CN116723451B CN 116723451 B CN116723451 B CN 116723451B CN 202311000933 A CN202311000933 A CN 202311000933A CN 116723451 B CN116723451 B CN 116723451B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
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Abstract
The invention discloses a playback power supply control circuit and a control method, wherein the playback power supply control circuit comprises a power supply control module, a sound amplifying module and a threshold value generation comparison module; after the power supply input signal, the power supply output signal and the sound playing input signal are all input to the threshold value generation comparison module for sampling, the threshold value generation comparison module compares the magnitude of the sampling signal of the power supply input signal with the magnitude of the sampling signal of the sound playing input signal, and adjusts the magnitude of the power supply output signal input to the sound amplifying module by the power supply control module according to the comparison result; the final boost voltage is attached to the final output voltage of the sound amplifying module as much as possible, and the output efficiency of the sound amplifying module and the power supply time of the sound amplifying module are improved.
Description
Technical Field
The invention relates to the field of audio circuit control, in particular to a playback power supply control circuit and a control method.
Background
As the demand for portable devices and electric vehicles increases, battery powered applications increase. In the case of battery powered, a power converter is often required to convert the voltage of the battery to the desired voltage.
At present, in order to realize larger loudness in the application of the playback device, larger power is required to be output, and at the moment, the voltage of the battery needs to be raised to supply power for the playback device, but extra power consumption is generated in the process of boosting, so that the output efficiency is reduced, and the higher the boosting is, the lower the output efficiency is, and the larger the energy loss is. Meanwhile, the energy consumption loss caused by the boosting can cause the shortening of the power supply time of the playback equipment.
However, in the working process of the playback device, the power supply voltage is not always required to be in a high-voltage working state, but is required to be adjusted according to the playback requirement, the power supply converter is only required to boost the discharge device when playing loud sound, the playback requirement can be met only by low or even no boost when playing small sound, in order to enable the exhaustion brought by boost to be as small as possible, the power supply time of the playback device is longer, and the boost is required to be attached to the voltage required by sound playing as much as possible.
Disclosure of Invention
The invention aims to provide a playback power supply control circuit and a control method, which are used for controlling the boost voltage to be attached to the audio output voltage output by playback equipment as much as possible, so as to improve the output efficiency and the power supply time of the audio amplifying equipment.
The invention provides a playback power supply control circuit, which comprises a power supply control module, a sound amplifying module and a threshold value generation comparison module;
after the power supply input signal, the power supply output signal and the sound playing input signal are all input to the threshold value generation comparison module for sampling, the threshold value generation comparison module compares the magnitude of the sampling signal of the power supply input signal with the magnitude of the sampling signal of the sound playing input signal, and adjusts the magnitude of the power supply output signal input to the sound amplifying module by the power supply control module according to the comparison result;
the audio input signal is also input to the amplifying module, amplified by the amplifying module and then output.
Further, the threshold generation comparison module comprises an inverting amplifier, a voltage rectification circuit, a first resistor, a second resistor, a third resistor and a fourth resistor;
the sound input signal is rectified by a voltage rectifying circuit and then is input to the positive input end of the reverse amplifier through the third resistor, and the bias voltage is connected to the positive input end of the reverse amplifier through the fourth resistor; the negative input end of the reverse amplifier is connected with the output end of the reverse amplifier through the second resistor, the second resistor is also connected with the first resistor and then grounded, and the output end of the reverse amplifier outputs the sampling signal of the sound amplification input signal.
Further, the threshold value generation comparison module further comprises a pass-through comparator and a voltage division circuit;
the output end of the inverting amplifier is also connected with the positive input end of the through comparator, and a power supply input signal is connected with the negative input end of the through comparator through a voltage dividing circuit; and the output end of the through comparator is connected with the power supply control module.
Further, the threshold generation comparison module comprises an error amplifier and a voltage dividing circuit;
the output end of the reverse amplifier is connected with the first positive input end of the error amplifier, and the second positive input end of the error amplifier is connected with a clamping voltage; the power supply output signal is connected to the negative input end of the error amplifier through the voltage dividing circuit; and the output end of the error amplifier is connected with the power supply control module.
Further, the voltage dividing circuit comprises a fifth resistor and a sixth resistor;
the power supply input signal or the power supply output signal is respectively connected with the negative input end of the through comparator or the error amplifier through the fifth resistor and grounded through the fifth resistor and the sixth resistor.
Further, the power supply control module comprises a first MOS tube and a second MOS tube;
the threshold value generation comparison module controls the conduction of the first MOS tube and the second MOS tube, the power supply input signal is input to the source electrode of the first MOS tube after passing through the source electrode of the second MOS tube, and the drain electrode of the first MOS tube outputs the power supply output signal; and the drain electrode of the second MOS tube is grounded.
Furthermore, the invention also provides a playback power supply control method, which adopts the power supply control module, and comprises the following steps:
the power supply input signal, the power supply output signal and the sound playing input signal are input into the threshold value generation comparison module for sampling; the threshold value generation comparison module compares the magnitude of the sampling signal of the power supply input signal with the magnitude of the sampling signal of the sound playing input signal, and adjusts the magnitude of the power supply output signal input to the sound amplifying module by the power supply control module according to the comparison result;
the audio input signal is input to the amplifying module, amplified by the amplifying module and then output.
Further, amplifying and sampling the audio input signal to obtain a first sampling signal; the first sampling signal is greater than the audio input signal.
Further, the audio input signal is amplified and sampled to obtain a signal with the size ofWherein k is an amplification factor, vd is a bias voltage connected to an inverting amplifier, and Ain is the audio input signal.
Further, the power supply output signal and the power supply input signal are subjected to voltage division and then sampled to obtain a second sampling signal and a third sampling signal;
and the partial pressure coefficient of the second sampling signal and the third sampling signal is the reciprocal of the amplification factor of the amplifying module.
Further, when the first sampling signal is smaller than the second sampling signal, the power supply control module does not boost the sound amplifying module;
and when the first sampling signal is larger than the second sampling signal, the power supply control module boosts the sound amplifying module.
Further, when the first sampling signal is smaller than the second sampling signal, the through comparator controls the first MOS tube of the power supply control module to be conducted, the second MOS tube is closed, and the power supply control module does not boost the voltage of the sound amplifying module;
when the first sampling signal is larger than the second sampling signal, the error amplifier controls the second MOS tube of the power supply control module to be opened, and the power supply control module boosts the sound amplifying module.
Further, rectifying the sound input signal through a voltage rectifying circuit and amplifying the sound input signal through an inverting amplifier to obtain a first sampling signal;
and dividing the power supply input signal and the power supply output signal by a voltage dividing circuit to obtain a second sampling signal and a third sampling signal.
Further, the maximum value of the power supply output signal isAnd G is the amplification factor of the amplifying module, and Vclamp is the clamping voltage of the second positive input end of the access error amplifier.
Compared with the prior art, the invention has at least the following beneficial effects:
the invention sets a threshold value generating and comparing module in the playback power supply control circuit, after sampling the power supply input signal, the power supply output signal and the audio playback input signal, compares the sampled signal of the power supply input signal with the sampled signal of the audio playback input signal, and adjusts the power supply output signal of the power supply control module according to the comparison result to adjust the boost value of the audio amplifying module, so that the audio playback output signal and the power supply output signal are attached as much as possible, and the output efficiency of the audio amplifying module and the power supply duration of the audio amplifying module are improved.
Drawings
FIG. 1 is a block diagram of a sound reproducing power supply control circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a sound reproducing power supply control circuit according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a voltage rectifying circuit according to an embodiment of the invention;
fig. 4 is a control effect diagram of the playback power supply voltage in the first embodiment of the invention.
Detailed Description
In the following, a playback power supply control circuit and control method of the present invention will be described in conjunction with the schematic drawings, in which preferred embodiments of the present invention are shown, it being understood that those skilled in the art can modify the invention described herein while still achieving the advantageous effects of the invention. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the invention.
The invention is more particularly described by way of example in the following paragraphs with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
Example 1
The invention provides a playback power supply control circuit, referring to FIG. 1 specifically, comprising a power supply control module, a sound amplifying module and a threshold value generation comparison module;
the power supply input signal Vin, the power supply output signal Vout and the audio input signal Ain are all input to the threshold value generation comparison module for sampling; the threshold value generation comparison module compares the magnitude of the sampling signal of the power supply input signal Vin with the magnitude of the sampling signal of the sound amplification input signal Ain, and then adjusts the magnitude of the power supply output signal Vout input to the sound amplification module by the power supply control module according to the comparison result.
Referring to fig. 2, specifically, the threshold generation comparing module includes an inverting amplifier 3, a voltage rectifying circuit, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4.
The sound input signal Ain is rectified by a voltage rectifying circuit and then is input to the positive input end of the reverse amplifier 3 through the third resistor R3, and the bias voltage Vd is connected to the positive input end of the reverse amplifier 3 through the fourth resistor R4; the negative input end of the inverting amplifier 3 is connected with the output end of the inverting amplifier 3 through the second resistor R2, the second resistor R2 is also connected with the first resistor R1 and then grounded, and the output end of the inverting amplifier 3 outputs the sampling signal of the audio input signal Ain.
Referring to fig. 3, in a specific example, the voltage rectifying circuit includes a comparator C1, an inverting amplifier, a seventh resistor R7, an eighth resistor R8, a first switch S1, and a second switch S2.
The audio input signal Ain is input to the input end of the inverting amplifier through the seventh resistor R7, and the eighth resistor R8 is connected in parallel with the input end and the output end of the inverting amplifier; the audio input signal Ain is amplified by the inverting amplifier and then is input to the negative input end of the comparator C1, and the negative input end of the comparator C1 is connected with the first output end of the comparator C1 through the first switch S1; the audio input signal Ain is also input to the positive input end of the comparator C1, and the positive input end of the comparator C1 is connected with the second output end of the comparator C1 through the second switch S2; the first switch S1 and the second switch S2 output the audio input signal Ain to the inverting amplifier 3.
In this example, the voltage rectifying circuit full-wave rectifies the sound input signal Ain to obtain a sound input signal of magnitude |ain|.
In this example, the power control module takes some time to boost due to the current limit of the power input signal Vin. Therefore, in order to ensure that the power supply output signal Vout is of a magnitude that meets the output requirements of the amplifying module, it is necessary to make the final power supply output signal Vout larger than the power supply voltage required by the amplifying module. Thus, the present example finally outputs a signal of magnitude through the inverting amplifier 3Such that the final output supply output signal Vout can be larger than the supply voltage required by the loudspeaker module.
Referring to fig. 2 again, further, the threshold value generation comparison module further includes a pass-through comparator 1 and a voltage division circuit;
the output end of the reverse amplifier 3 is also connected with the positive input end of the through comparator 1, and a power supply input signal Vin is connected with the negative input end of the through comparator 1 through a voltage dividing circuit; the output end of the through comparator 1 is connected with the power supply control module.
The threshold generation comparison module further comprises an error amplifier 2 and a voltage dividing circuit.
The output end of the reverse amplifier 3 is connected with the first positive input end of the error amplifier 2, and the second positive input end of the error amplifier 2 is connected with a clamp voltage Vclamp; the power supply output signal Vout is connected to the negative input end of the error amplifier 2 through a voltage dividing circuit; the output end of the error amplifier 2 is connected with the power supply control module.
The voltage dividing circuit comprises a fifth resistor R5 and a sixth resistor R6; the power supply input signal Vin or the power supply output signal Vout is respectively connected to the negative input terminal of the through comparator 1 or the error amplifier 2 through the fifth resistor R5, and is grounded through the fifth resistor R5 and the sixth resistor R6.
The fifth resistor R5 and the sixth resistor R6 divide the power supply input signal Vin and the power supply output signal Vout, so that the negative input ends of the pass comparator 1 and the error amplifier 2 respectively input a second sampling signal and a third sampling signal with the magnitudes Vin/G and Vout/G. At this time, the amplitude of the second sampling signal is the same as the amplitude of the third sampling signal.
Further, the power supply control module includes a first MOS transistor M1 and a second MOS transistor M2.
The power supply input signal Vin is input to the source electrode of the first MOS transistor M1 after passing through the source electrode of the second MOS transistor M2, and the drain electrode of the first MOS transistor M1 outputs the power supply output signal Vout; the drain electrode of the second MOS tube M2 is grounded.
Referring to fig. 4, let the amplification factor of the amplifying module be G, and the final output signal of the amplifying module beThe larger the audio input signal Ain is, the larger the audio output signal Aout is, and the larger the power supply output signal Vout is, the power supply output signal Vout is according to ∈x according to the audio input signal Ain>The setting of (2) is used for boosting, so that the final playback requirement is met, the boosting amplitude of the power supply output signal Vout is reduced as much as possible, and the efficiency loss is reduced. The audio output signal Aout and the power supply output signal Vout are attached as much as possible, so as to improve the output efficiency of the amplifying module and the power supply duration of the amplifying module.
Example two
The embodiment provides a playback power supply control method, which comprises the following steps:
the power supply input signal Vin, the power supply output signal Vout and the audio input signal Ain are all input to the threshold value generation comparison module for sampling; the threshold value generation comparison module compares the magnitude of the sampling signal of the power supply input signal Vin with the magnitude of the sampling signal of the sound amplification input signal Ain, and then adjusts the magnitude of the power supply output signal Vout input to the sound amplification module by the power supply control module according to the comparison result.
Specifically, the power supply input signal Vin, the power supply output signal Vout and the audio-visual input signal Ain are sampled to obtain a first sampling signal, a second sampling signal and a third sampling signal respectively;
when the first sampling signal is smaller than the second sampling signal, the power supply control module does not boost the sound amplifying module;
and when the first sampling signal is larger than the second sampling signal, the power supply control module boosts the sound amplifying module.
In a specific example, the threshold generation comparison module samples the audio input signal Vin to obtain a value ofWhere k is an amplification factor and Vd is a bias voltage applied to the inverting amplifier 3.
In an ideal state, the amplification factor of the amplifying module is not considered, the value of k is set to be 1, the value of Vd is set to be 0, and the power supply output signal Vout is completely attached to the amplifying output signal Aout. However, the specific values of k and Vd are also affected by the boosting speed, and k can only be set as close to 1 as possible, and Vd is set as close to 0. In a specific example, if the boost speed is higher, the smaller the value of k is, the smaller Vd is, and at this time, the smaller the margin provided by the threshold value generation comparison module is. When the boosting speed is slower, the larger the value of k is set, the larger Vd is, and at the moment, the margin provided by the threshold value generation comparison module is larger. The above arrangement meets the output requirement of the sound amplifying module, and makes the power supply output signal Vout and the sound amplifying output signal Aout fit as much as possible.
Further, the threshold generation comparison module samples the power supply input signal Vin; and obtaining a second sampling signal with the size of VIN/G, wherein 1/G is a partial pressure coefficient. And sampling the power supply output signal Vout to obtain a third sampling signal with the size of Vout/G, wherein 1/G is a voltage division coefficient.
In an ideal state, the amplification factor of the amplifying module is G, and the size of the amplifying output signal Vout is. Setting k to be 1, setting Vd to be 0, when the voltage division coefficient of the second sampling signal is 1/G, amplifying the power supply input signal Vin by G times by the error amplifier 2, and at this time, completely attaching the power supply output signal Vout to the audio-visual output signal.
That is, in order to make the power supply output signal Vout fit to the audio output signal Aout as much as possible, the voltage division coefficient needs to correspond to the amplification factor, specifically, the voltage division coefficient is the inverse of the amplification factor.
In a specific example, the power supply control module has a maximum boost size ofWherein G is the amplification factor of the amplifying module, vclamp is a clamping voltage, and is connected to the second positive input terminal of the error amplifier 2, that is, when the value of the first sampling signal exceeds Vclamp, the power supply output signal Vout is +.>。
Further, when the first sampling signal is smaller than the second sampling signal, the through comparator 1 controls the first MOS tube M1 of the power supply control module to be turned on, and the second MOS tube M2 to be turned off, at this time, the power supply control module does not boost the voltage of the amplifying module, and the system is in a through state, and the efficiency of the amplifying module is highest.
When the first sampling signal is greater than the second sampling signal, the error amplifier 2 starts to control the second MOS tube M2 of the power supply control module to be started, and the power supply control module boosts the sound amplifying module.
According to the invention, the threshold value generation comparison module is arranged in the playback power supply control circuit, after the power supply input signal Vin, the power supply output signal Vout and the audio playback input signal Ain are sampled, the sampled signal Vin of the power supply input signal and the sampled signal of the audio playback input signal Ain are compared, and the power supply output signal Vout of the power supply control module is adjusted according to the comparison result so as to adjust the boosting value of the amplifying module, so that the final boosting value is attached to the final output voltage of the amplifying module as much as possible, and the output efficiency of the amplifying module and the power supply duration of the amplifying module are improved.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (12)
1. The playback power supply control circuit is characterized by comprising a power supply control module, a sound amplifying module and a threshold value generation comparison module;
after the power supply input signal, the power supply output signal and the sound playing input signal are all input to the threshold value generation comparison module for sampling, the threshold value generation comparison module compares the magnitude of the sampling signal of the power supply input signal with the magnitude of the sampling signal of the sound playing input signal, and adjusts the magnitude of the power supply output signal input to the sound amplifying module by the power supply control module according to the comparison result;
the threshold value generation comparison module comprises an inverting amplifier, a voltage rectification circuit, a first resistor, a second resistor, a third resistor and a fourth resistor;
the sound input signal is rectified by a voltage rectifying circuit and then is input to the positive input end of the reverse amplifier through the third resistor, and the bias voltage is connected to the positive input end of the reverse amplifier through the fourth resistor; the negative input end of the reverse amplifier is connected with the output end of the reverse amplifier through the second resistor, the second resistor is also connected with the first resistor and then grounded, and the output end of the reverse amplifier outputs the sampling signal of the sound and amplification input signal;
the audio input signal is also input to the amplifying module, amplified by the amplifying module and then output.
2. The playback power supply control circuit of claim 1, wherein said threshold generation comparison module further comprises a pass-through comparator and a voltage divider circuit;
the output end of the inverting amplifier is also connected with the positive input end of the through comparator, and a power supply input signal is connected with the negative input end of the through comparator through a voltage dividing circuit; and the output end of the through comparator is connected with the power supply control module.
3. The playback power supply control circuit of claim 1, wherein said threshold generation comparison module comprises an error amplifier and a voltage divider circuit;
the output end of the reverse amplifier is connected with the first positive input end of the error amplifier, and the second positive input end of the error amplifier is connected with a clamping voltage; the power supply output signal is connected to the negative input end of the error amplifier through the voltage dividing circuit; and the output end of the error amplifier is connected with the power supply control module.
4. A playback power supply control circuit as claimed in claim 2 or 3, characterized in that the voltage dividing circuit comprises a fifth resistor and a sixth resistor;
the power supply input signal or the power supply output signal is respectively connected with the negative input end of the through comparator or the error amplifier through the fifth resistor and grounded through the fifth resistor and the sixth resistor.
5. The playback power supply control circuit of claim 1, wherein the power supply control module comprises a first MOS transistor and a second MOS transistor;
the threshold value generation comparison module controls the conduction of the first MOS tube and the second MOS tube, the power supply input signal is input to the source electrode of the first MOS tube after passing through the source electrode of the second MOS tube, and the drain electrode of the first MOS tube outputs the power supply output signal; and the drain electrode of the second MOS tube is grounded.
6. A playback power supply control method employing the playback power supply control circuit according to any one of claims 1 to 5, characterized in that the control method comprises:
the power supply input signal, the power supply output signal and the sound playing input signal are input to the threshold value generation comparison module;
the threshold value generation comparison module divides the power supply output signal and the power supply input signal and then samples the power supply output signal and the power supply input signal to obtain a second sampling signal and a third sampling signal; the partial pressure coefficient of the second sampling signal and the third sampling signal is the reciprocal of the amplification factor of the amplifying module;
the threshold value generation comparison module compares the magnitude of the sampling signal of the power supply input signal with the magnitude of the sampling signal of the sound playing input signal, and adjusts the magnitude of the power supply output signal input to the sound amplifying module by the power supply control module according to the comparison result;
the audio input signal is also input to the amplifying module, and is output after being amplified by the amplifying module.
7. The playback power supply control method of claim 6, wherein said audio input signal is sampled to obtain a first sampled signal, said first sampled signal being greater than said audio input signal.
8. The playback power supply control method of claim 7, wherein,
amplifying and sampling the audio input signal to obtain a signal with the size ofWherein k is an amplification factor, vd is a bias voltage connected to an inverting amplifier, and Ain is the audio input signal.
9. The playback power supply control method of claim 8, wherein,
when the first sampling signal is smaller than the second sampling signal, the power supply control module does not boost the sound amplifying module;
and when the first sampling signal is larger than the second sampling signal, the power supply control module boosts the sound amplifying module.
10. The playback power supply control method of claim 9, wherein,
when the first sampling signal is smaller than the second sampling signal, the through comparator controls the first MOS tube M1 of the power supply control module to be conducted, the second MOS tube is closed, and the power supply control module does not boost the voltage of the sound amplifying module;
when the first sampling signal is larger than the second sampling signal, the error amplifier controls the second MOS tube of the power supply control module to be opened, and the power supply control module boosts the sound amplifying module.
11. The playback power supply control method of claim 6, wherein,
rectifying the sound-amplifying input signal through a voltage rectifying circuit and amplifying the sound-amplifying input signal through an inverting amplifier to obtain a first sampling signal;
and dividing the power supply input signal and the power supply output signal by a voltage dividing circuit to obtain a second sampling signal and a third sampling signal.
12. The playback power supply control method of claim 6, wherein,
the maximum value of the power supply output signal isAnd G is the amplification factor of the amplifying module, and Vclamp is the clamping voltage of the second positive input end of the access error amplifier.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5363062A (en) * | 1992-05-22 | 1994-11-08 | Sgs-Thomson Microelectronics S.R.L. | Audio amplifier on-off control circuit |
| US5523715A (en) * | 1995-03-10 | 1996-06-04 | Schrader; Daniel J. | Amplifier arrangement and method and voltage controlled amplifier and method |
| JPH08222976A (en) * | 1995-02-15 | 1996-08-30 | Rohm Co Ltd | Audio signal amplifier |
| JP2007295685A (en) * | 2006-04-24 | 2007-11-08 | Oki Electric Ind Co Ltd | Boosting circuit device |
| FR2950208A1 (en) * | 2009-09-17 | 2011-03-18 | St Microelectronics Grenoble 2 | EXIT STAGE OF A CLASS A AMPLIFIER |
| CN102638229A (en) * | 2012-04-18 | 2012-08-15 | 上海艾为电子技术有限公司 | Audio amplification circuit |
| CN102917294A (en) * | 2011-08-01 | 2013-02-06 | 奥林巴斯映像株式会社 | Audio recording and playback device, and power feed method for audio recording and playback device |
| CN112039447A (en) * | 2020-09-30 | 2020-12-04 | 深圳市纳芯威科技有限公司 | Audio power amplifier integrated circuit and audio equipment |
| CN112653399A (en) * | 2020-12-22 | 2021-04-13 | 中国电子科技集团公司第四十七研究所 | Noise elimination device of digital audio power amplifier |
| WO2022121540A1 (en) * | 2020-12-07 | 2022-06-16 | Oppo广东移动通信有限公司 | Audio processing circuit and playback apparatus |
| CN116317582A (en) * | 2023-04-10 | 2023-06-23 | 上海艾为电子技术股份有限公司 | Boost circuit and load driving system |
| CN116418231A (en) * | 2023-06-12 | 2023-07-11 | 上海海栎创科技股份有限公司 | Boosting control method of power supply and audio device |
| CN116566347A (en) * | 2023-07-10 | 2023-08-08 | 上海海栎创科技股份有限公司 | Audio device and power supply control method with gain control |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR0302553A (en) * | 2003-07-01 | 2005-03-29 | Intelbras S A Ind De Telecomun | Sampled Voice Spectral Spread Cordless Telephone Equipment |
| CN1805274A (en) * | 2005-01-12 | 2006-07-19 | Qsc音频产品公司 | Multi-chunnel, multi-power d kind amplifier with stabilized power |
| JP6629562B2 (en) * | 2015-10-14 | 2020-01-15 | ローム株式会社 | Audio circuit, electronic equipment using it |
-
2023
- 2023-08-10 CN CN202311000933.6A patent/CN116723451B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5363062A (en) * | 1992-05-22 | 1994-11-08 | Sgs-Thomson Microelectronics S.R.L. | Audio amplifier on-off control circuit |
| JPH08222976A (en) * | 1995-02-15 | 1996-08-30 | Rohm Co Ltd | Audio signal amplifier |
| US5523715A (en) * | 1995-03-10 | 1996-06-04 | Schrader; Daniel J. | Amplifier arrangement and method and voltage controlled amplifier and method |
| JP2007295685A (en) * | 2006-04-24 | 2007-11-08 | Oki Electric Ind Co Ltd | Boosting circuit device |
| FR2950208A1 (en) * | 2009-09-17 | 2011-03-18 | St Microelectronics Grenoble 2 | EXIT STAGE OF A CLASS A AMPLIFIER |
| CN102917294A (en) * | 2011-08-01 | 2013-02-06 | 奥林巴斯映像株式会社 | Audio recording and playback device, and power feed method for audio recording and playback device |
| CN102638229A (en) * | 2012-04-18 | 2012-08-15 | 上海艾为电子技术有限公司 | Audio amplification circuit |
| CN112039447A (en) * | 2020-09-30 | 2020-12-04 | 深圳市纳芯威科技有限公司 | Audio power amplifier integrated circuit and audio equipment |
| WO2022121540A1 (en) * | 2020-12-07 | 2022-06-16 | Oppo广东移动通信有限公司 | Audio processing circuit and playback apparatus |
| CN112653399A (en) * | 2020-12-22 | 2021-04-13 | 中国电子科技集团公司第四十七研究所 | Noise elimination device of digital audio power amplifier |
| CN116317582A (en) * | 2023-04-10 | 2023-06-23 | 上海艾为电子技术股份有限公司 | Boost circuit and load driving system |
| CN116418231A (en) * | 2023-06-12 | 2023-07-11 | 上海海栎创科技股份有限公司 | Boosting control method of power supply and audio device |
| CN116566347A (en) * | 2023-07-10 | 2023-08-08 | 上海海栎创科技股份有限公司 | Audio device and power supply control method with gain control |
Non-Patent Citations (1)
| Title |
|---|
| 反馈在扩音机电路设计中的应用;郭宗南;;中国战略新兴产业(第04期);全文 * |
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