CN209642949U - The vehicle-mounted balanced device of microphone with wireless audio frequency transmission function - Google Patents

Abstract

The utility model discloses a kind of vehicle-mounted balanced devices of the microphone with wireless audio frequency transmission function, described includes audio wireless reception and processing module, audio distribution module, first power amplifier module, second power amplifier module, amplifier power supply module and output interface, audio wireless receives and processing module is for wirelessly receiving microphone audio input signal；Audio distribution module is for distributing no less than two-way audio output signal；First power amplifier module is used for no less than audio signal carries out power amplification all the way；Second power amplifier module is used for in addition no less than audio signal carries out power amplification all the way；Amplifier power supply module is for providing power amplification power supply；Audio signal of the output interface for output.Power synchronous amplification is carried out by four tunnel audio signals of the output to input interface, and loudspeaker carries out three-dimensional broadcasting to four tunnel audio signals, to enhance the three-dimensional sense of sound.The problems such as reduce causes connecting line to wear by wired mode connection, and replacement is not troublesome.

Description

The vehicle-mounted balanced device of microphone with wireless audio frequency transmission function

Technical field

The utility model relates to vehicle electronics technical field more particularly to a kind of microphone with wireless audio frequency transmission function are vehicle-mounted Balanced device.

Background technique

Vehicle-mounted balanced device is used to carry out the output audio signal of automobile the amplification of power, with enhancing interior ground speaker effect Fruit, existing vehicle-mounted balanced device mainly pass through single audio frequency output channel and play out to sound, the sound of single audio output Three-dimensional sense is not strong.It is unable to satisfy existing car owner and demand is felt to the solid of speaker.

It is connect in addition, existing vehicle-mounted balanced device mainly passes through wire microphone with vehicle-mounted balanced device, passes through wheat to realize Gram vehicle-mounted equalizer transfer sound of wind direction can frequently result in connecting line abrasion by wired mode connection, and replacement is not troublesome etc. to ask Topic.

Utility model content

The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality It is to propose a kind of vehicle-mounted balanced device of the microphone with wireless audio frequency transmission function with a novel purpose.

To achieve the above object, according to the vehicle-mounted equilibrium of the microphone with wireless audio frequency transmission function of the utility model embodiment Device, the vehicle-mounted balanced device of the microphone with wireless audio frequency transmission function include:

Audio wireless receives and processing module, and the audio wireless receives and processing module is for wirelessly receiving Microphone audio input signal, and exported after handling audio processing；

Audio distribution module, the audio distribution module is received with the audio wireless and processing module is connect, the sound Frequency distribution module is used to carry out signal after the audio processing distribution of audio, distributes no less than two-way audio output letter Number；

First power amplifier module, first power amplifier module are connect with the audio distribution module, for the audio point The no less than audio signal progress power amplification all the way of output with module；

Second power amplifier module, second power amplifier module are connect with the audio distribution module, for the audio point The in addition no less than audio signal progress power amplification all the way of output with module；

Amplifier power supply module, the amplifier power supply module connect with first power amplifier module and the second power amplifier module respectively It connects, for providing power amplification power supply for first power amplifier module and the second power amplifier module；

Output interface, the output interface are connect with first power amplifier module and the second high energy power amplifier module respectively, are used It is exported in the audio signal for exporting first power amplifier module and the second power amplifier module and carries out the broadcasting of audio signal.

Further, one embodiment according to the present utility model, it is defeated that the audio distribution module assignment goes out eight tunnel audios Signal out.

Further, one embodiment according to the present utility model, the audio wireless receives and processing module includes:

Wireless receiving module, the wireless receiving module are used to be wirelessly connected with wireless microphone, and receive described wireless Microphone audio input audio signal modulation and demodulation after output audio signal；

Audio driver module, the audio driver module is received with the audio wireless and processing module is connect, and being used for will The audio wireless receives and the audio signal of processing module output carries out gain amplification and driving output.

Further, one embodiment according to the present utility model, first power amplifier module includes Audio power amplifier Integrated circuit and the first power amplifier peripheral circuit, the frequency power amplifying IC respectively with second audio input interface The two-way audio signal connection of the left and right acoustic channels of module input；

The first power amplifier peripheral circuit includes inductance L1, inductance L2, inductance L3, inductance L4, capacitor C5, capacitor C9, electricity Hold C11 and capacitor C15；One end of the inductance L1 and the right channel positive output end of the frequency power amplifying IC connect It connects, the other end of the inductance L1 is connect with one end of the capacitor C5, and the other end of the capacitor C5 is connect with reference；

One end of the inductance L2 is connect with the right channel negative output terminal of the frequency power amplifying IC, the electricity The other end of sense L2 is connect with one end of the capacitor C9, and the other end of the capacitor C9 is connect with reference；

One end of the inductance L3 is connect with the L channel positive output end of the frequency power amplifying IC, the electricity The other end of sense L3 is connect with one end of the capacitor C11, and the other end of the capacitor C11 is connect with reference；

One end of the inductance L4 is connect with the L channel positive output end of the frequency power amplifying IC, the electricity The other end of sense L4 is connect with one end of the capacitor C15, and the other end of the capacitor C15 is connect with reference.

Further, one embodiment according to the present utility model, the first power amplifier peripheral circuit further include mute control electricity Road, the muting control circuit include triode Q6, triode Q5, triode Q1, resistance R38, resistance R37, resistance R16, electricity Hinder R4 and resistance R15；One end of the resistance R38 is connect with the control terminal ACC of the second audio input interface module, described The other end of resistance R38 is connect with the base stage of the triode Q6, and the emitter of the triode Q6 is connect with reference, described The collector of triode Q6 is connect with one end of the resistance R37, and the other end of the resistance is connect with power supply PVCC, The collector of the triode Q6 is also connect with the base electrode of the triode Q5, the emitter of the triode Q5 and reference Ground connection, the collection motor of the triode Q5 are connect with one end of the resistance R4, the other end of the resistance R4 and the confession Power supply PVCC connection；The collector of the triode Q5 is also connect with one end of the resistance R16, and the resistance R16's is another One end is connect with the base stage of the triode Q1, and the emitter of the triode Q1 is connect with reference, the triode Q1's Collector is connect with one end of resistance R15, and the other end of the resistance R15 is connect with the power supply PVCC, three pole The current collection of pipe Q1 is also connect with the mute control terminal of the frequency power amplifying IC.

Further, one embodiment according to the present utility model, the amplifier power supply module includes power IC And power supply peripheral circuit, the power supply peripheral circuit include boost inductance L9, pulsewidth modulation MOS transistor Q7, synchronous rectification MOS transistor Q8, filter capacitor C53, feedback divider resistance R48 and resistance R49；

The power supply side 12V connection of second audio input interface module described in one end of the boost inductance L9, it is described The other end of boost inductance L9 is connect with the drain electrode of the pulsewidth modulation MOS transistor Q7, the pulsewidth modulation MOS transistor Q7 Source electrode connect with reference to ground, the pulse-width adjustment of the grid of the pulsewidth modulation MOS transistor Q7 and the power IC The drain electrode of output end connection, the pulsewidth modulation MOS transistor Q7 also connects with the source electrode of the synchronous rectification MOS transistor Q8 Connect, the grid of the synchronous rectification MOS transistor Q8 is connect with the synchronously control end of the power IC, it is described synchronize it is whole The drain electrode of stream MOS transistor Q8 is connect with one end of the filter capacitor C53, the other end of the filter capacitor C53 and reference Ground connection, the drain electrode of synchronous rectification MOS transistor Q8 are also connect with one end of the feedback divider resistance R48, the feedback point The other end of piezoresistance R48 is connect with one end of the resistance R49, and the other end of the resistance R49 is connect with reference, described Feedback divider resistance R48 is connect with the common end of resistance R49 with the pressure feedback port of the power IC.

Further, one embodiment according to the present utility model, the power supply peripheral circuit further include that amplifier power supply is opened Control circuit is closed, the amplifier power supply ON-OFF control circuit includes resistance R54, triode Q10, resistance R53, triode Q9, electricity Hinder R52 and resistance R43；One end of the resistance R54 is connect with the control terminal ACC of the second audio input interface module, institute The other end for stating resistance R54 is connect with the base stage of the triode Q10, and the emitter and reference ground of the triode Q10 is even It connects, the collector of the triode Q10 is connect with one end of the resistance R53, the other end of the resistance R53 and described second The power supply side 12V connection of audio input interface module, the collector of the triode Q10 is also with the triode Q9's The emitter of base stage connection, the triode Q9 is connect with reference, and the collector of the triode Q9 is with the resistance R52's One end connection, the other end of the resistance R52 connect with one end of the resistance R43, the other end of the resistance R43 with it is described The power supply side 12V connection of second audio input interface module, the resistance R52, resistance R43 common end also with it is described The under-voltage locking programming end connection of power IC.

Further, one embodiment according to the present utility model, the frequency power amplifying IC are D class audio frequency Power amplification circuit.

Further, one embodiment according to the present utility model further includes the first audio input interface module, and described One audio input interface module is connect with the audio distribution module, for receiving audio signal input letter by wired mode Number.

Further, one embodiment according to the present utility model further includes the second audio input interface module, and described Two audio input interface modules are connect with first power amplifier module and the second power amplifier module respectively, for being connect by wired mode Receive audio signal input signal.

The vehicle-mounted balanced device of microphone with wireless audio frequency transmission function provided by the embodiment of the utility model, is connect by audio wireless It receives and processing module receives audio signal input signal, and by the first power amplifier module and the second power amplifier module to second sound Four tunnel audio signals of the output of frequency input interface module carry out power synchronous amplification, and loudspeaker carries out four tunnel audio signals Solid plays, to enhance the three-dimensional sense of sound.In addition, being first power amplifier module and the second power amplifier by amplifier power supply module Module provides power amplification power supply, realizes the high-power output and mute control of the first power amplifier module, saves electric energy.

It is received additionally by audio wireless and processing module receives microphone input signal, reduced and connected by wired mode Cause connecting line to wear, replaces the problems such as not troublesome, be convenient for the user to use.

Detailed description of the invention

Fig. 1 is the vehicle-mounted equaliser structure signal of the microphone provided by the embodiment of the utility model with wireless audio frequency transmission function Figure；

Fig. 2 is audio wireless provided by the embodiment of the utility model reception and processing module (wireless receiving module and audio Drive module) electrical block diagram；

Fig. 3 is audio distribution modular circuit structural schematic diagram provided by the embodiment of the utility model；

Fig. 4 is the first power amplifier module provided by the embodiment of the utility model, the second power amplifier modular circuit structural schematic diagram；

Fig. 5 is amplifier power supply modular circuit structural schematic diagram provided by the embodiment of the utility model；

Fig. 6 is output interface circuit structural schematic diagram provided by the embodiment of the utility model；

Fig. 7 is the first audio input interface modular circuit structural schematic diagram provided by the embodiment of the utility model；

Fig. 8 is the second audio input interface modular circuit structural schematic diagram provided by the embodiment of the utility model.

Appended drawing reference:

Audio wireless receives and processing module 10；

Wireless receiving module 101；

Audio driver module 102；

Power supply module 103；

Audio distribution module 20；

First power amplifier module 30；

Second power amplifier module 40；

Amplifier power supply module 50；

Output interface 60；

First audio input interface module 70；

Second audio input interface 80.

The utility model aim is realized, the embodiments will be further described with reference to the accompanying drawings for functional characteristics and advantage.

Specific embodiment

In order to make those skilled in the art better understand the scheme of the utility model, below in conjunction with the utility model reality The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described.Unless otherwise defined, All technical and scientific terms used herein are generally understood with person skilled in the technical field of the present invention Meaning it is identical.Terminology used in the description of the utility model herein is intended merely to description specific embodiment Purpose, it is not intended that in limitation the utility model.

Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments It is contained at least one embodiment of the utility model., which there is the phrase, in each position in the description to be each meant Identical embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art are explicit Ground and implicitly understand, embodiment described herein can be combined with other embodiments.

Refering to fig. 1, the utility model provides a kind of vehicle-mounted balanced device of the microphone with wireless audio frequency transmission function, comprising: audio Wireless receiving and processing module 10, audio distribution module 20, the first power amplifier module 30, the second power amplifier module 40, amplifier power supply mould Block 50 and output interface 60, the audio wireless receives and processing module 10 is for wirelessly receiving microphone audio Input signal, and exported after handling audio processing；It is received by audio wireless and processing module 10 connects with wireless microphone equipment It connects, to receive the audio signal of wireless microphone input equipment output.

The audio distribution module 20 is received with the audio wireless and processing module 10 is connect, the audio distribution module 20, for signal after the audio processing to be carried out to the distribution of audio, distribute no less than two-way audio output signal；Refering to figure 3, the audio wireless receives and processing module 10 will receive audio input signal all the way and be transmitted to the audio distribution module 20, the audio distribution module 20 audio signal will distribute no less than two-way audio output signal all the way.To realize audio The three-dimensional voice output of signal.

First power amplifier module 30 is connect with the audio distribution module 20, for the audio distribution module 20 The no less than audio signal progress power amplification all the way of output；Refering to Fig. 4, first power amplifier module 30 respectively with the audio The audio signal connection of the two-way input of the output of distribution module 20, it is described to carry out the amplification of power to two-way audio signal The audio signal of two-way input can be left and right acoustic channels audio signal.To realize the power amplification to the audio signal of left and right acoustic channels.

Second power amplifier module 40 is connect with the audio distribution module 20, for the audio distribution module 20 The in addition no less than audio signal progress power amplification all the way of output；Second power amplifier module 40 divides with the audio respectively The audio signal connection of the other two-way input of output with module 20, is put with carrying out power to other two-way audio signal Greatly, the audio signal of the other two-way input can be left and right acoustic channels audio signal.To realize the audio signal to left and right acoustic channels Power amplification.

The power amplification of the audio signal inputted by first power amplifier module 30 to two-way and the second power amplifier are to another The power amplification of outer two-way audio signal, to realize the power synchronous amplification to the stereo sound of the audio signal of input.

The amplifier power supply module 50 is connect with first power amplifier module 30 and the second power amplifier module 40 respectively, for for First power amplifier module 30 and the second power amplifier module 40 provide power amplification power supply；Refering to fig. 1 and Fig. 5, amplifier power supply Input power 12V is carried out power management boosting by module 50, and output power amplifies power supply PVCC, and the power amplification supplies Power supply is output to first power amplifier module 30 and the second power amplifier module 40, is first power amplifier module 30 and the second function Amplification module 40 provides amplifier power supply, first power amplifier module 30 and the input of the second power amplifier module 40 and the power amplification power supply The power of the corresponding output of PVCC.

The output interface 60 is connect with first power amplifier module 30 and the second high energy power amplifier module respectively, is used for institute The audio signal output loudspeaker of the first power amplifier module 30 and the output of the second power amplifier module 40 is stated, to carry out broadcasting for audio signal It puts.It can connect with four loudspeakers with Fig. 6, the output interface 60, audio can be believed by four loudspeakers respectively refering to fig. 1 Number three-dimensional broadcasting is carried out, to enhance the three-dimensional sense of sound.

Refering to Fig. 3, the audio distribution module 20 distributes eight road audio output signals.The audio distribution module 20 is logical Cross that audio signal (A) and the audio wireless receive and the output end of processing module 10 is connect, and will the audio signal all the way By eight amplifiers to being exported after enhanced processing, so that the independent audio signal output in eight tunnels will be distributed into all the way by realizing.

Referring to Fig.2, the audio wireless receives and processing module 10 includes: wireless receiving module 101 and audio driven mould Block 102, the wireless receiving module 101 is used to be wirelessly connected with wireless microphone, and it is defeated to receive the wireless microphone audio Output audio signal after the audio signal modulation entered and demodulation；The wireless receiving module 101 receives microphone and passes through wireless parties The wireless signal that formula is sent, and after the wireless signal received is demodulated, extracts original audio signal, and by audio signal Output.

The audio driver module 102 is received with the audio wireless and processing module 10 is connect, and is used for the audio The audio signal that wireless receiving and processing module 10 export carries out gain amplification and driving output.The audio wireless receives and place Managing the audio signal that module 10 exports may be small-signal, before carrying out audio signal by the audio driver module 102 After the amplification of end, to facilitate the subsequent processing to audio signal.

Refering to Fig. 4, first power amplifier module 30 includes frequency power amplifying IC U1 and the first power amplifier periphery electricity Road, the two-way for the left and right acoustic channels that the frequency power amplifying IC is inputted with the second audio input interface module respectively Audio signal connection；The frequency power amplifying IC U1 is connect with the two-way audio signal of the left and right acoustic channels, with right The two-way audio signal amplifies processing.In the utility model embodiment, the frequency power amplifying IC is D Class audio frequency power amplification circuit.The D class audio frequency power amplification circuit to the left and right two-way audio signal of input into The audio signal of input, is converted into the digital signal of pulsewidth modulation, to facilitate the D to audio signal by the synchronous pulsewidth modulation of row Class power amplification.

The first power amplifier peripheral circuit includes inductance L1, inductance L2, inductance L3, inductance L4, capacitor C5, capacitor C9, electricity Hold C11 and capacitor C15；One end of the inductance L1 and the right channel positive output end of the frequency power amplifying IC connect It connects, the other end of the inductance L1 is connect with one end of the capacitor C5, and the other end of the capacitor C5 is connect with reference；Institute The one end for stating inductance L2 is connect with the right channel negative output terminal of the frequency power amplifying IC, and the inductance L2's is another End is connect with one end of the capacitor C9, and the other end of the capacitor C9 is connect with reference；One end of the inductance L3 and institute The L channel positive output end connection of frequency power amplifying IC is stated, the other end of the inductance L3 is with the capacitor C11's The other end of one end connection, the capacitor C11 is connect with reference；One end of the inductance L4 and the Audio power amplifier collection It is connected at the L channel positive output end of circuit, the other end of the inductance L4 is connect with one end of the capacitor C15, the capacitor The other end of C15 is connect with reference.

Referring to Fig.2, being combined into the first filter circuit between the inductance L1 and capacitor C5, pass through first filter circuit The digital signal of pulsewidth modulation after voltage amplification that the frequency power amplifying IC exports is filtered, high frequency is believed It number is filtered out, to restore audio signal.Similarly, second filter, the inductance are formed between the inductance L2 and capacitor C8 Third filter is formed between L3 and capacitor C11, and the 4th filter is formed between the inductance L4 and capacitor C15.Described first Filter, second filter, third filter and the 4th filter are respectively to frequency power amplifying IC output The positive and negative terminal of two-way audio signal carries out High frequency filter, with reduction and the amplified two-way audio signal of output power.

Refering to Fig. 4, the first power amplifier peripheral circuit further includes muting control circuit, and the muting control circuit includes three Pole pipe Q6, triode Q5, triode Q1, resistance R38, resistance R37, resistance R16, resistance R4 and resistance R15；The resistance R38 One end connect with the control terminal ACC of the second audio input interface module, the other end of the resistance R38 and three pole The base stage of pipe Q6 connects, and the emitter of the triode Q6 is connect with reference, the collector and the electricity of the triode Q6 Hinder one end connection of R37, the other end of the resistance connect with power supply PVCC, the collector of the triode Q6 also with institute The base electrode connection of triode Q5 is stated, the emitter of the triode Q5 is connect with reference, the collection motor of the triode Q5 It is connect with one end of the resistance R4, the other end of the resistance R4 is connect with the power supply PVCC；The triode Q5 Collector also connect with one end of the resistance R16, the base stage of the other end of the resistance R16 and the triode Q1 connect It connecing, the emitter of the triode Q1 is connect with reference, and the collector of the triode Q1 is connect with one end of resistance R15, The other end of the resistance R15 is connect with the power supply PVCC, the current collection of the triode Q1 also with the audio power The mute control terminal (MUTE) of amplification circuit connects.

When the control terminal ACC is high level, be connected between the collector and emitter of the triode Q6, described three The collector of pole pipe Q6 exports low level, at this point, ending between the collector and emitter of the triode Q5, the triode The collector of Q5 exports high level, so that it is in the conductive state between the collector and emitter of the triode Q1, described three The collector of pole pipe Q1 exports low level, and the mute control terminal (MUTE) of the frequency power amplifying IC is low level, Since the mute control terminal (MUTE) of the frequency power amplifying IC is that high level is effective.At this point, the audio power Amplification circuit is in audio output state.

On the contrary, the frequency power amplifying IC is in mute when the control terminal ACC is low level or is hanging State.It is, when the second audio input interface module does not connect input audio signal, the control terminal ACC is Vacant state can control the frequency power amplifying IC to enter mute state, saves electricity by muting control circuit.

Refering to Fig. 5, the amplifier power supply module 50 includes power IC and power supply peripheral circuit, the power supply periphery Circuit includes boost inductance L9, pulsewidth modulation MOS transistor Q7, synchronous rectification MOS transistor Q8, filter capacitor C53, feedback point Piezoresistance R48 and resistance R49；The power supply side of second audio input interface module described in one end of the boost inductance L9 12V connection, the other end of the boost inductance L9 are connect with the drain electrode of the pulsewidth modulation MOS transistor Q7, the pulsewidth tune The source electrode of MOS transistor Q7 processed is connect with reference, and the grid and the power supply of the pulsewidth modulation MOS transistor Q7 is integrated The pulse-width adjustment output end of circuit connects, the drain electrode of the pulsewidth modulation MOS transistor Q7 also with the synchronous rectification MOS crystal The source electrode of pipe Q8 connects, and the grid of the synchronous rectification MOS transistor Q8 and the synchronously control end of the power IC connect It connects, the drain electrode of the synchronous rectification MOS transistor Q8 is connect with one end of the filter capacitor C53, the filter capacitor C53's The other end is connect with reference, and the one end of the drain electrode of synchronous rectification MOS transistor Q8 also with the feedback divider resistance R48 connects It connects, the other end of the feedback divider resistance R48 is connect with one end of the resistance R49, the other end and ginseng of the resistance R49 It connects with examining, the common end of the feedback divider resistance R48 and resistance R49 and the pressure feedback port of the power IC connect It connects.

The power IC U3 and boost inductance L9, pulsewidth modulation MOS transistor Q7, synchronous rectification MOS are brilliant Body pipe Q8, filter capacitor C53, feedback divider resistance R48 and resistance R49 form BOOST booster circuit.The boost inductance L9 It exports after boosting to input power to the pulsewidth modulation MOS transistor Q7, synchronous rectification MOS transistor Q8, the arteries and veins Width modulation MOS transistor Q7, synchronous rectification MOS transistor Q8 respectively the control of the power IC U3 carry out conducting or Cut-off.So that the output end output modulation pulsewidth direct current of the synchronous rectification MOS transistor Q8, the modulation pulsewidth direct current After filtering by the capacitor C53, DC power supply is exported.The DC power supply passes through the feedback divider resistance R48 and electricity Output passes through power IC described in feedback voltage to the pressure feedback port of the power IC U3 after hindering R49 partial pressure U3 can carry out the adjustment of pulsewidth width to the modulation pulsewidth direct current, to keep the stability of the output DC power supply.

Refering to Fig. 5, the power supply peripheral circuit further includes amplifier power supply ON-OFF control circuit, the amplifier power supply switch control Circuit processed includes resistance R54, triode Q10, resistance R53, triode Q9, resistance R52 and resistance R43；The resistance R54's One end is connect with the control terminal ACC of the second audio input interface module, the other end of the resistance R54 and three pole The base stage of pipe Q10 connects, and the emitter of the triode Q10 is connect with reference, the collector of the triode Q10 and institute State one end connection of resistance R53, the power supply side of the other end of the resistance R53 and the second audio input interface module 12V connection, the collector of the triode Q10 are also connect with the base stage of the triode Q9, the transmitting of the triode Q9 Pole is connect with reference, and the collector of the triode Q9 is connect with one end of the resistance R52, and the resistance R52's is another End is connect with one end of the resistance R43, the power supply of the other end of the resistance R43 and the second audio input interface module Feeder ear 12V connection, the resistance R52, resistance R43 common end also with the under-voltage locking of the power IC program Hold (UVLO) connection.

When the control terminal ACC is high level, be connected between the collector and emitter of the triode Q10, it is described The collector of triode Q10 exports low level, at this point, ending between the collector and emitter of the triode Q9, described three The collector of pole pipe Q5 exports high level, and the resistance R52, resistance R43 are exported after dividing to power supply side 12V to the electricity The under-voltage locking of source integrated circuit U3 programs end (UVLO), and the power IC U3 is in normal operating conditions at this time.

On the contrary, when the control terminal ACC is low level or is hanging, the under-voltage locking programming of the power IC U3 Holding (UVLO) is low level, and the power IC U3, which is in, closes output state, saves electricity.

The vehicle-mounted balanced device of microphone with wireless audio frequency transmission function provided by the embodiment of the utility model, is connect by audio wireless It receives and processing module 10 receives audio signal input signal, and by the first power amplifier module 30 and the second power amplifier module 40 to described Four tunnel audio signals of the output of the second audio input interface module carry out power synchronous amplification, and loudspeaker believes four tunnel audios Number three-dimensional broadcasting is carried out, to enhance the three-dimensional sense of sound.In addition, being first power amplifier module 30 by amplifier power supply module 50 Power amplification power supply is provided with the second power amplifier module 40, realizes the high-power output and mute control of the first power amplifier module 30 System saves electric energy.

It is received additionally by audio wireless and processing module 10 receives microphone input signal, reduced and connected by wired mode It the problems such as connecing causes connecting line to wear, and replacement is not troublesome, is convenient for the user to use.

It further include the first audio input interface module 70 refering to Fig. 7, the first audio input interface module 70 and institute The connection of audio distribution module 20 is stated, for receiving audio signal input signal by wired mode.It is defeated by first audio Incoming interface module 70 can receive audio signal input signal by wired mode, realize the diversity of input audio signal, convenient The use of user.The first audio input interface module 70 connects input audio signal all the way, passes through the audio distribution mould Block 20 distributes output multi-channel audio signal, realizes three-dimensional voice output.

It further include 80 module of the second audio input interface refering to Fig. 8,80 module of the second audio input interface difference It is connect with first power amplifier module 30 and the second power amplifier module 40, for receiving audio signal input letter by wired mode Number.Audio signal input signal can be received by wired mode by 80 module of the second audio input interface, realize input The diversity of audio signal, is convenient for the user to use.Second audio input interface, the 80 module connection multipath input audio letter Number, realize three-dimensional voice output.

The above is only the embodiments of the present invention, are not intended to limit the scope of the patents of the utility model, although referring to before Embodiment is stated the utility model is described in detail, it, still can be right for coming for those skilled in the art Technical solution documented by aforementioned each specific embodiment is modified, or carries out equivalent replace to part of technical characteristic It changes.All equivalent structures done using the utility model specification and accompanying drawing content are directly or indirectly used in other correlations Technical field, similarly within the utility model patent protection scope.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term Stating may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be It can be combined in any suitable manner in any one or more embodiment or examples.

Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is Illustratively, it should not be understood as limiting the present invention, those skilled in the art are not departing from the utility model Principle and objective in the case where above-described embodiment can be changed in the scope of the utility model, modify, replace and Modification.

Claims (10)

1. a kind of vehicle-mounted balanced device of the microphone with wireless audio frequency transmission function characterized by comprising

Audio wireless receives and processing module, and the audio wireless receives and processing module is for wirelessly receiving Mike Wind audio input signal, and exported after handling audio processing；

Audio distribution module, the audio distribution module is received with the audio wireless and processing module is connect, the audio point It is used to carry out signal after the audio processing distribution of audio with module, distributes no less than two-way audio output signal；

First power amplifier module, first power amplifier module are connect with the audio distribution module, for the audio distribution mould The no less than audio signal progress power amplification all the way of the output of block；

Second power amplifier module, second power amplifier module are connect with the audio distribution module, for the audio distribution mould The in addition no less than audio signal progress power amplification all the way of the output of block；

Amplifier power supply module, the amplifier power supply module are connect with first power amplifier module and the second power amplifier module respectively, are used In providing power amplification power supply for first power amplifier module and the second power amplifier module；

Output interface, the output interface are connect with first power amplifier module and the second high energy power amplifier module respectively, and being used for will First power amplifier module and the audio signal of the second power amplifier module output export and carry out the broadcasting of audio signal.

2. the vehicle-mounted balanced device of the microphone with wireless audio frequency transmission function according to claim 1, which is characterized in that the audio Distribution module distributes eight road audio output signals.

3. the vehicle-mounted balanced device of the microphone with wireless audio frequency transmission function according to claim 2, which is characterized in that the audio Wireless receiving and processing module include:

Wireless receiving module, the wireless receiving module is used to be wirelessly connected with wireless microphone, and receives the wireless Mike Output audio signal after the audio signal modulation of wind audio input and demodulation；

Audio driver module, the audio driver module is received with the audio wireless and processing module is connect, and being used for will be described Audio wireless receives and the audio signal of processing module output carries out gain amplification and driving output.

4. the vehicle-mounted balanced device of the microphone with wireless audio frequency transmission function according to claim 1, which is characterized in that further include One audio input interface module, the first audio input interface module are connect with the audio distribution module, for by having Line mode receives audio signal input signal.

5. the vehicle-mounted balanced device of the microphone with wireless audio frequency transmission function according to claim 1, which is characterized in that further include Two audio input interface modules, the second audio input interface module respectively with first power amplifier module and the second power amplifier mould Block connection, for receiving audio signal input signal by wired mode.

6. the vehicle-mounted balanced device of the microphone with wireless audio frequency transmission function according to claim 5, which is characterized in that described first Power amplifier module includes frequency power amplifying IC and the first power amplifier peripheral circuit, the frequency power amplifying IC point It is not connect with the two-way audio signal of the left and right acoustic channels of the second audio input interface module input；

The first power amplifier peripheral circuit includes inductance L1, inductance L2, inductance L3, inductance L4, capacitor C5, capacitor C9, capacitor C11 With capacitor C15；One end of the inductance L1 is connect with the right channel positive output end of the frequency power amplifying IC, described The other end of inductance L1 is connect with one end of the capacitor C5, and the other end of the capacitor C5 is connect with reference；

One end of the inductance L2 is connect with the right channel negative output terminal of the frequency power amplifying IC, the inductance L2 The other end connect with one end of the capacitor C9, the other end of the capacitor C9 with reference to connect；

One end of the inductance L3 is connect with the L channel positive output end of the frequency power amplifying IC, the inductance L3 The other end connect with one end of the capacitor C11, the other end of the capacitor C11 with reference to connect；

One end of the inductance L4 is connect with the L channel positive output end of the frequency power amplifying IC, the inductance L4 The other end connect with one end of the capacitor C15, the other end of the capacitor C15 with reference to connect.

7. the vehicle-mounted balanced device of the microphone with wireless audio frequency transmission function according to claim 6, which is characterized in that the first power amplifier Peripheral circuit further includes muting control circuit, and the muting control circuit includes triode Q6, triode Q5, triode Q1, electricity Hinder R38, resistance R37, resistance R16, resistance R4 and resistance R15；One end of the resistance R38 and second audio input interface The control terminal ACC connection of module, the other end of the resistance R38 are connect with the base stage of the triode Q6, the triode Q6 Emitter with reference to connect, the collector of the triode Q6 is connect with one end of the resistance R37, the resistance it is another One end is connect with power supply PVCC, and the collector of the triode Q6 is also connect with the base electrode of the triode Q5, described The emitter of triode Q5 is connect with reference, and the collection motor of the triode Q5 is connect with one end of the resistance R4, described The other end of resistance R4 is connect with the power supply PVCC；The collector of the triode Q5 also with the resistance R16 one End connection, the other end of the resistance R16 are connect with the base stage of the triode Q1, the emitter of the triode Q1 and reference Ground connection, the collector of the triode Q1 are connect with one end of resistance R15, the other end of the resistance R15 and the power supply Power supply PVCC connection, the current collection of the triode Q1 are also connect with the mute control terminal of the frequency power amplifying IC.

8. the vehicle-mounted balanced device of the microphone with wireless audio frequency transmission function according to claim 6, which is characterized in that the power amplifier Power module includes power IC and power supply peripheral circuit, and the power supply peripheral circuit includes boost inductance L9, pulsewidth tune MOS transistor Q7 processed, synchronous rectification MOS transistor Q8, filter capacitor C53, feedback divider resistance R48 and resistance R49；

The power supply side 12V connection of second audio input interface module described in one end of the boost inductance L9, the boosting The other end of inductance L9 is connect with the drain electrode of the pulsewidth modulation MOS transistor Q7, the source of the pulsewidth modulation MOS transistor Q7 Pole is connect with reference, and the grid of the pulsewidth modulation MOS transistor Q7 and the pulse-width adjustment of the power IC export End connection, the drain electrode of the pulsewidth modulation MOS transistor Q7 are also connect with the source electrode of the synchronous rectification MOS transistor Q8, institute The grid for stating synchronous rectification MOS transistor Q8 is connect with the synchronously control end of the power IC, the synchronous rectification MOS The drain electrode of transistor Q8 is connect with one end of the filter capacitor C53, and the other end and reference ground of the filter capacitor C53 is even It connects, the drain electrode of synchronous rectification MOS transistor Q8 is also connect with one end of the feedback divider resistance R48, the feedback partial pressure electricity The other end of resistance R48 is connect with one end of the resistance R49, and the other end of the resistance R49 is connect with reference, the feedback Divider resistance R48 is connect with the common end of resistance R49 with the pressure feedback port of the power IC.

9. the vehicle-mounted balanced device of the microphone with wireless audio frequency transmission function according to claim 8, which is characterized in that the power supply Peripheral circuit further includes amplifier power supply ON-OFF control circuit, and the amplifier power supply ON-OFF control circuit includes resistance R54, triode Q10, resistance R53, triode Q9, resistance R52 and resistance R43；One end of the resistance R54 and second audio input interface The control terminal ACC connection of module, the other end of the resistance R54 are connect with the base stage of the triode Q10, the triode The emitter of Q10 is connect with reference, and the collector of the triode Q10 is connect with one end of the resistance R53, the resistance The other end of R53 is connect with the power supply side 12V of the second audio input interface module, the current collection of the triode Q10 Pole is also connect with the base stage of the triode Q9, and the emitter of the triode Q9 is connect with reference, the triode Q9's Collector is connect with one end of the resistance R52, and the other end of the resistance R52 is connect with one end of the resistance R43, described The other end of resistance R43 is connect with the power supply side 12V of the second audio input interface module, the resistance R52, resistance The common end of R43 is also connect with the under-voltage locking of power IC programming end.

10. the vehicle-mounted balanced device of the microphone with wireless audio frequency transmission function according to claim 6, which is characterized in that the sound Frequency power amplification circuit is D class audio frequency power amplification circuit.