CN206878780U - Audio power amplifying circuit - Google Patents
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- CN206878780U CN206878780U CN201720512680.4U CN201720512680U CN206878780U CN 206878780 U CN206878780 U CN 206878780U CN 201720512680 U CN201720512680 U CN 201720512680U CN 206878780 U CN206878780 U CN 206878780U
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Abstract
The utility model is applied to technical field of integrated circuits, there is provided a kind of audio power amplifying circuit, dc source VDD output voltage signal are powered after boost module boosts to D-type audio power amplifier；When power amplifier selecting module exports the first control signal, D-type audio power amplifier conducting, then the audio signal that D-type audio power amplifier export to audio-source is amplified handle after be transferred to loudspeaker by output driving and export；When power amplifier selecting module exports the second control signal, the conducting of AB genus audio power amplifiers, then the audio signal that AB genus audio power amplifiers exports to audio-source is amplified handle after be transferred to loudspeaker by output driving and export.Thus D-type audio power amplifier and AB genus audio power amplifiers are integrated, the advantages of combining D-type audio power amplifier efficiency high and AB genus audio power amplifier Low emissivities, and powered using boost module to D-type audio power amplifier, improve power output.
Description
Technical field
The utility model belongs to technical field of integrated circuits, more particularly to a kind of audio power amplifying circuit.
Background technology
Now, for portable electric appts, D-type audio power amplifier due to efficiency high (typically 95% or so),
Generate heat the features such as small and be widely adopted.But D-type audio power amplifier due to output is high-frequency digital switching signal,
Electromagnetic radiation can be produced, there is the electromagnetic radiation that certain methods can reduce D-type audio power amplifier at present, these methods are to pass through
For the delay of increase raising and lowering come what is realized, increase delay can reduce efficiency again, therefore lose more than gain.
AB genus audio power amplifiers are because input and output are all analog signals, so the problem of electromagnetic radiation is not present,
In the case where requiring higher to electromagnetic radiation, AB genus audio power amplifiers, AB genus audio power amplifiers can be used
In order to reduce intermodulation distortion, it is necessary to the preset voltage of output driving, make output driving can be with lightly conducting, so AB class audio frequencies
There is certain quiescent current in power amplifier output, therefore efficiency is between A classes and B classes, usually 60%-70%.
But D-type audio power amplifier or AB genus audio power amplifiers are all single use in the prior art, respectively
It is advantageous, also respectively there is inferior position.
Therefore, there is because of D-type audio power amplifier or AB class audio frequency power for existing Audio power amplifier technology
Amplifier is all single use, and the advantages of can not combining both is operated with so as to cause efficiency low and the wasting of resources
The problem of.
Utility model content
The purpose of this utility model is to provide a kind of audio power amplifying circuit, it is intended to solves existing audio power and puts
Big technology can not combine two there is being all single use because of D-type audio power amplifier or AB genus audio power amplifiers
The problem of the advantages of person, is operated with so as to cause the wasting of resources.
The utility model provides a kind of audio power amplifying circuit, and the audio power amplifying circuit exports audio-source
Audio signal be amplified processing after exported by loudspeaker, the audio power amplifying circuit includes：
Boost module, power amplifier selecting module, AB genus audio power amplifiers, D-type audio power amplifier and output are driven
Dynamic model block；
Input and the AB class audio frequency power of the output end of the audio-source with the D-type audio power amplifier
The input of amplifier connects altogether, and the first output end of the power amplifier selecting module is controlled with the D-type audio power amplifier
End and the first connection end of the boost module connect altogether, and the second output of the power amplifier selecting module terminates the AB class audio frequencies
The controlled end of power amplifier, the 3rd output of the power amplifier selecting module terminate the Enable Pin of the output driving module, institute
State the input of boost module and the power end access dc source VDD of the AB genus audio power amplifiers, the boosting
The second connection end of module connects the power end of the D-type audio power amplifier, the output end of the D-type audio power amplifier
The first input end of the output driving module is connect, the output of the AB genus audio power amplifiers terminates the output driving mould
Second input of block, the output of the output driving module terminate the loudspeaker；
On the one hand the voltage signal of the dc source VDD outputs is powered to the AB genus audio power amplifiers,
On the other hand the D-type audio power amplifier is powered after the boost module is boosted；The power amplifier choosing
Selecting module controls the D-type audio power amplifier or the AB genus audio power amplifiers to be operated；
When the power amplifier selecting module exports the first control signal, the D-type audio power amplifier conducting and institute
The closing of AB genus audio power amplifiers is stated, so that the audio signal that the D-type audio power amplifier exports to the audio-source
Processing is amplified, and is carried out after the delay of preset time by the output driving module transfer to the loudspeaker
Output；
When the power amplifier selecting module exports the second control signal, the AB genus audio power amplifiers conducting and institute
D-type audio power amplifier closing is stated, so that the audio signal that the AB genus audio power amplifiers export to the audio-source
Exported after being amplified processing by the output driving module transfer to the loudspeaker.
In summary, the utility model provides a kind of audio power amplifying circuit, the audio signal that audio-source is exported
Be amplified processing after exported by loudspeaker, the audio power amplifying circuit include boost module, power amplifier selecting module,
AB genus audio power amplifiers, D-type audio power amplifier and output driving module；The voltage letter of dc source VDD outputs
Number one side is powered to AB genus audio power amplifiers, on the other hand to D class audio frequencies after boost module is boosted
Power amplifier is powered；Power amplifier selecting module controls D-type audio power amplifier or AB genus audio power amplifiers to enter
Row work；When power amplifier selecting module exports the first control signal, D-type audio power amplifier conducting and AB class audio frequency power
Amplifier is closed, so that the audio signal that D-type audio power amplifier exports to audio-source is amplified processing, and by pre-
If it is transferred to loudspeaker by output driving after the delay of time to be exported；When power amplifier selecting module exports the second control signal
When, the conducting of AB genus audio power amplifiers and D-type audio power amplifier are closed, so that AB genus audio power amplifiers are to sound
The audio signal of frequency source output is transferred to loudspeaker by output driving and exported after being amplified processing.Thus by D assonances
Frequency power amplifier and AB genus audio power amplifiers are integrated, and combine D-type audio power amplifier efficiency high and AB classes
The advantages of audio-frequency power amplifier Low emissivity, and powered using boost module to D-type audio power amplifier, improve output
Power, therefore solve existing Audio power amplifier technology there is because of D-type audio power amplifier or AB class audio frequency work(
Rate amplifier is all single use, and the advantages of can not combining both be operated with that efficiency is low and resource is unrestrained so as to cause
The problem of taking.
Brief description of the drawings
Fig. 1 is a kind of modular structure schematic diagram for audio power amplifying circuit that the utility model embodiment provides.
Fig. 2 is a kind of modular structure schematic diagram for audio power amplifying circuit that the utility model embodiment provides.
Fig. 3 is a kind of exemplary circuit figure for audio power amplifying circuit that the utility model embodiment provides.
Fig. 4 is the example of the power amplifier selecting module in a kind of audio power amplifying circuit that the utility model embodiment provides
Circuit diagram.
Embodiment
In order that the technical problems to be solved in the utility model, technical scheme and beneficial effect are more clearly understood, below
With reference to drawings and Examples, the utility model is further elaborated.It should be appreciated that specific implementation described herein
Example only to explain the utility model, is not used to limit the utility model.
The audio power amplifying circuit of the utility model embodiment, it is by D-type audio power amplifier and AB class audio frequency work(
Rate amplifier is integrated, therefore can select D-type audio power amplifier when efficiency requirements are high, when electromagnetic radiation requires high
AB genus audio power amplifiers are selected, so as to meet different application demands.
In order to illustrate technical scheme described in the utility model, illustrated below by specific embodiment.
Figures 1 and 2 show that a kind of modular structure for audio power amplifying circuit that the utility model embodiment provides, is
It is easy to illustrate, illustrate only the part related to the utility model embodiment, details are as follows：
A kind of above-mentioned audio power amplifying circuit, pass through after the audio signal that audio-source 201 exports is amplified into processing
Loudspeaker 301 is exported, and the audio power amplifying circuit includes boost module 104, power amplifier selecting module 102, AB class audio frequencies
Power amplifier 106, D-type audio power amplifier 105 and output driving module 107.
The output end of audio-source 201 and the input of D-type audio power amplifier 105 and AB genus audio power amplifiers
106 input connects altogether, the first output end of power amplifier selecting module 102 and the controlled end of D-type audio power amplifier 105 and
First connection end of boost module 104 connects altogether, the second output termination AB genus audio power amplifiers of power amplifier selecting module 102
106 controlled end, the 3rd output of the power amplifier selecting module 102 terminate the Enable Pin of the output driving module 107, boosting
The input of module 104 and the power end access dc source VDD of AB genus audio power amplifiers 106, boost module 104
Second connection end connects the power end of D-type audio power amplifier 105, and the output termination output of D-type audio power amplifier 105 is driven
The first input end of dynamic model block 107, the second of the output termination output driving module 107 of AB genus audio power amplifiers 106 are defeated
Enter end, the output termination loudspeaker 301 of output driving module 107.
On the one hand the voltage signal of dc source VDD outputs is powered to AB genus audio power amplifiers 106, the opposing party
Face is powered after boost module 104 is boosted to D-type audio power amplifier 105；Power amplifier selecting module 102 controls
D-type audio power amplifier 105 or AB genus audio power amplifiers 106 are operated.
When power amplifier selecting module 102 exports the first control signal, D-type audio power amplifier 105 turns on and AB classes
Audio-frequency power amplifier 106 is closed, so that the audio signal that D-type audio power amplifier 105 exports to audio-source 201 is put
Big processing, and be transferred to loudspeaker 301 by output driving module 107 after the delay of preset time and exported.
When power amplifier selecting module 102 exports the second control signal, AB genus audio power amplifiers 106 turn on and D classes
Audio-frequency power amplifier 105 is closed, so that the audio signal that AB genus audio power amplifiers 106 export to audio-source 201 is carried out
Loudspeaker 301 is transferred to after enhanced processing by output driving module 107 to be exported.
As the embodiment of the utility model one, above-mentioned audio power amplifying circuit also includes charging module 109, charging module
The output end of 109 input termination boost module 104；Charging module 109 receives the voltage signal that boost module 104 exports, and
External electronic equipment is charged.The power supply of charging module 109 can be the output voltage of boost module 104, can also
It is voltage signal of the output voltage of boost module 104 after partial pressure.The charging module 109 is carried out to external electronic equipment
Charging, uses large current charge when just starting to charge up, low current charge is switched to when approaching be full of soon.
As the embodiment of the utility model one, boost module 104, D classes are integrated with above-mentioned audio power amplifying circuit
Audio-frequency power amplifier 105, AB genus audio power amplifiers 106, power amplifier selecting module 102 and output driving module 107, are carried
High-output power and start-up noises are effectively eliminated, and combine the efficiency high of D-type audio power amplifier 105 and AB class audio frequencies
The advantages of 106 Low emissivity of power amplifier.Certainly, boost module 104, D-type audio power amplifier 105, AB class audio frequency power
Amplifier 106, power amplifier selecting module 102 and output driving module 107 can be both produced on different chips, can also be made
On the same chip.
Fig. 3 shows the exemplary circuit and Fig. 4 for a kind of audio power amplifying circuit that the utility model embodiment provides
Show a kind of exemplary circuit of the power amplifier selecting module in audio power amplifying circuit, for convenience of description, illustrate only with
The related part of the utility model embodiment, details are as follows：
As the embodiment of the utility model one, above-mentioned power amplifier selecting module 102 includes NOT gate NOT1, rest-set flip-flop (in Fig. 4
It is middle using RS1 represent) and delay circuit, NOT gate NOT1 input and the second input of rest-set flip-flop connect altogether and be used as work(
The receiving terminal (being represented in Fig. 4 using MODE) of selecting module 102 is put, the first of NOT gate NOT1 output termination rest-set flip-flop is defeated
Enter end, the first output end (being represented in Fig. 4 using EN_D) of rest-set flip-flop connects the input of delay circuit, delay circuit it is defeated
Go out first output end (in Fig. 4 using DELAY represent) of the end for power amplifier selecting module 102, the second output end of rest-set flip-flop
For the second output end (being represented in Fig. 4 using EN_AB) of power amplifier selecting module 102.MODE is power amplifier selection signal, works as MODE
For low level (power amplifier selecting module 102 export the first control signal) when, rest-set flip-flop is set to 0, and EN_AB outputs are high level, this
When AB genus audio power amplifiers 106 do not work, EN_D outputs are low level, D-type audio power amplifier 105 and boost module
104 normal works；When MODE is high level (power amplifier selecting module 102 exports the second control signal), rest-set flip-flop puts 1, EN_
D outputs are high level, and now D-type audio power amplifier 105 does not work, and EN_AB outputs are low level, and AB class audio frequency power is put
The big normal work of device 106.Same time AB genus audio power amplifiers 106 and D-type audio power amplifier can so be ensured
105 only one of which are in running order.When 106 turns of D-type audio power amplifier 105 of AB class audio amplifiers,
Because the power supply of D-type audio power amplifier 105 needs to produce by boost module 104, and boosting needs the regular hour,
After boosting value stabilization, output driving module 107 could be opened, therefore exports audio signal, works as EN_D to loudspeaker 301
When exporting low level, the low level needs to enter line delay by delay circuit, then exports to output driving module 107, enables defeated
Go out drive module 107.Above-mentioned delay circuit is delay circuit commonly used in the prior art.
As the embodiment of the utility model one, above-mentioned boost module 104 includes boost chip U2, boost chip U2 input
End In, connection end Pht, output end Out and power end Bat are respectively the input of boost module 104, the first connection end, the
Two connection ends and output end.In the present embodiment, boost chip U2 employs model SY77063DC~DC boost chip,
Certainly, the model of boost chip is not construed as limiting, and also may be used as long as can reach with the function described in the present embodiment boost chip U2.
Meanwhile boost module 104 can be the converter of the peak point current sampling configuration based on inductance or the electricity based on electric capacity
Lotus pump circuit, is not limited thereto.
A kind of above-mentioned operation principle of audio power amplifying circuit is illustrated below in conjunction with Fig. 2-Fig. 4：
First, the input of boost module 104 is dc source VDD, and output voltage PVDD gives D class audio frequency work(after being boosted
Rate amplifier 105 is powered, and voltage PVDD is necessarily higher than dc source VDD, has so reached the effect for improving power output.Power amplifier
Selecting module 102 selects D-type audio power amplifier 105 or AB class audio frequency power to put according to the selection signal MODE of outside
Big device 106, if selection D-type audio power amplifier 105, power amplifier selecting module 102 enable D-type audio power amplifier
105 and boost module 104, the power supply of D-type audio power amplifier 105 is the output voltage PVDD of boost module 104, due to D
The efficiency of genus audio power amplifier 105 and boost module 104 is all very high, so, both work simultaneously, the Audio power amplifier
The efficiency of circuit can be slightly less than the efficiency that wherein some module works independently, but be in higher level；If
AB genus audio power amplifiers 106 are selected, then power amplifier selecting module 102 enables AB genus audio power amplifiers 106, not enabled to rise
Die block 104, the power supply of AB genus audio power amplifiers 106 is dc source VDD, due to AB genus audio power amplifiers 106
Efficiency be less than D-type audio power amplifier 105, if so selection AB genus audio power amplifiers 106, boost module
104 do not work, and reduce power attenuation, the efficiency of the audio power amplifying circuit is the effect of AB genus audio power amplifiers 106
Rate.The input of output driving module 107 is the output of D-type audio power amplifier 105 and AB genus audio power amplifiers 106,
Certain driving force is provided and exports audio to loudspeaker 301.
In summary, the utility model embodiment provides a kind of audio power amplifying circuit, the sound that audio-source is exported
Frequency signal is exported after being amplified processing by loudspeaker, and the audio power amplifying circuit includes boost module, power amplifier selects
Select module, AB genus audio power amplifiers, D-type audio power amplifier and output driving module；Dc source VDD outputs
On the one hand voltage signal is powered to AB genus audio power amplifiers, on the other hand to D after boost module is boosted
Genus audio power amplifier is powered；Power amplifier selecting module controls D-type audio power amplifier or AB class audio frequency power to put
Big device is operated；When power amplifier selecting module exports the first control signal, D-type audio power amplifier conducting and AB assonances
Frequency power amplifier is closed, so that the audio signal that D-type audio power amplifier exports to audio-source is amplified processing, and
Loudspeaker is transferred to after the delay of preset time by output driving to be exported；When the control of power amplifier selecting module output second
During signal processed, the conducting of AB genus audio power amplifiers and D-type audio power amplifier are closed, so that AB class audio frequency power amplifications
The audio signal that device exports to audio-source is transferred to loudspeaker by output driving and exported after being amplified processing.Thus will
D-type audio power amplifier and AB genus audio power amplifiers are integrated, combine D-type audio power amplifier efficiency high and
The advantages of AB genus audio power amplifier Low emissivities, and powered using boost module to D-type audio power amplifier, improve
Power output, therefore solve existing Audio power amplifier technology there is because of D-type audio power amplifier or AB assonances
Frequency power amplifier is all single use, and can not be operated with reference to the advantages of both so as to cause efficiency low and provide
The problem of source wastes.The utility model embodiment is realized simple, it is not necessary to increases extra hardware, can effectively reduce cost, has
There is stronger usability and practicality.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (3)
1. a kind of audio power amplifying circuit, the audio signal that audio-source exports is amplified by the audio power amplifying circuit
Exported after processing by loudspeaker, it is characterised in that the audio power amplifying circuit includes：
Boost module, power amplifier selecting module, AB genus audio power amplifiers, D-type audio power amplifier and output driving mould
Block；
Input and the AB class audio frequency power amplification of the output end of the audio-source with the D-type audio power amplifier
The input of device connects altogether, the first output end of the power amplifier selecting module and the controlled end of the D-type audio power amplifier with
And the first connection end of the boost module connects altogether, the second output of the power amplifier selecting module terminates the AB class audio frequencies power
The controlled end of amplifier, the 3rd output of the power amplifier selecting module terminate the Enable Pin of the output driving module, the liter
The power end of the input of die block and the AB genus audio power amplifiers accesses dc source VDD, the boost module
Second connection end meet the power end of the D-type audio power amplifier, the output termination institute of the D-type audio power amplifier
The first input end of output driving module is stated, the output of the AB genus audio power amplifiers terminates the output driving module
Second input, the output of the output driving module terminate the loudspeaker；
On the one hand the voltage signal of the dc source VDD outputs is powered to the AB genus audio power amplifiers, another
Aspect is powered after the boost module is boosted to the D-type audio power amplifier；The power amplifier selects mould
Block controls the D-type audio power amplifier or the AB genus audio power amplifiers to be operated；
When the power amplifier selecting module exports the first control signal, the D-type audio power amplifier conducting and the AB
Genus audio power amplifier is closed, so that the audio signal that the D-type audio power amplifier exports to the audio-source is carried out
Enhanced processing, and it is defeated to loudspeaker progress by the output driving module transfer after the delay of preset time
Go out；
When the power amplifier selecting module exports the second control signal, the AB genus audio power amplifiers conducting and the D
Genus audio power amplifier is closed, so that the audio signal that the AB genus audio power amplifiers export to the audio-source is carried out
Exported after enhanced processing by the output driving module transfer to the loudspeaker.
2. audio power amplifying circuit as claimed in claim 1, it is characterised in that the audio power amplifying circuit also includes
Charging module,
The input of the charging module terminates the output end of the boost module；
The charging module receives the voltage signal of the boost module output, and external electronic equipment is charged.
3. audio power amplifying circuit as claimed in claim 1, it is characterised in that the power amplifier selecting module includes：
NOT gate NOT1, rest-set flip-flop and delay circuit；
The input of the NOT gate NOT1 connects with the second input of the rest-set flip-flop and is used as the power amplifier selecting module altogether
Receiving terminal, the output of the NOT gate NOT1 terminates the first input end of the rest-set flip-flop, and the first of the rest-set flip-flop is defeated
Go out the input for terminating the delay circuit, the output end of the delay circuit exports for the first of the power amplifier selecting module
End, the second output end of the rest-set flip-flop are the second output end of the power amplifier selecting module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720512680.4U CN206878780U (en) | 2017-05-09 | 2017-05-09 | Audio power amplifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720512680.4U CN206878780U (en) | 2017-05-09 | 2017-05-09 | Audio power amplifying circuit |
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| CN206878780U true CN206878780U (en) | 2018-01-12 |
Family
ID=61339440
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964622A (en) * | 2018-06-26 | 2018-12-07 | 合肥市汤诚集成电路设计有限公司 | One kind being based on BCD high-pressure process F genus audio power amplifier |
| CN112752195A (en) * | 2020-12-30 | 2021-05-04 | 恒玄科技(上海)股份有限公司 | Audio power amplifier processing method and audio power amplifier system for earphone |
| CN115037257A (en) * | 2022-08-11 | 2022-09-09 | 上海芯龙半导体技术股份有限公司南京分公司 | Audio power amplifying circuit and audio power amplifying chip |
| CN115378370A (en) * | 2022-10-21 | 2022-11-22 | 荣耀终端有限公司 | Audio amplification circuit, board card and electronic equipment |
-
2017
- 2017-05-09 CN CN201720512680.4U patent/CN206878780U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964622A (en) * | 2018-06-26 | 2018-12-07 | 合肥市汤诚集成电路设计有限公司 | One kind being based on BCD high-pressure process F genus audio power amplifier |
| CN112752195A (en) * | 2020-12-30 | 2021-05-04 | 恒玄科技(上海)股份有限公司 | Audio power amplifier processing method and audio power amplifier system for earphone |
| CN115037257A (en) * | 2022-08-11 | 2022-09-09 | 上海芯龙半导体技术股份有限公司南京分公司 | Audio power amplifying circuit and audio power amplifying chip |
| CN115037257B (en) * | 2022-08-11 | 2022-12-27 | 上海芯龙半导体技术股份有限公司南京分公司 | Audio power amplifying circuit and audio power amplifying chip |
| CN115378370A (en) * | 2022-10-21 | 2022-11-22 | 荣耀终端有限公司 | Audio amplification circuit, board card and electronic equipment |
| WO2024082862A1 (en) * | 2022-10-21 | 2024-04-25 | 荣耀终端有限公司 | Audio amplification circuit, board card, and electronic device |
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Address after: 518000 1701, building 1, Shenzhen new generation industrial park, 136 Zhongkang Road, Meidu community, Meilin street, Futian District, Shenzhen City, Guangdong Province Patentee after: Fuman microelectronics Group Co.,Ltd. Address before: B7-b8, 9th floor, Yanxiang science and technology building, 31 Gaoxin Fourth Road, Nanshan Science and Technology Park, Shenzhen, Guangdong 518000 Patentee before: FINE MADE MICROELECTRONICS GROUP CO.,LTD. |
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Address after: 518000, Building 101, Fuman Microelectronics Group Co., Ltd., Intersection of Renmin East Road and Shouhe Road, Jinsha Community, Kengzi Street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: Fuman microelectronics Group Co.,Ltd. Country or region after: China Address before: 518000 1701, building 1, Shenzhen new generation industrial park, 136 Zhongkang Road, Meidu community, Meilin street, Futian District, Shenzhen City, Guangdong Province Patentee before: Fuman microelectronics Group Co.,Ltd. Country or region before: China |