CN205017275U - On -vehicle power amplifier module - Google Patents
On -vehicle power amplifier module Download PDFInfo
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- CN205017275U CN205017275U CN201520653592.7U CN201520653592U CN205017275U CN 205017275 U CN205017275 U CN 205017275U CN 201520653592 U CN201520653592 U CN 201520653592U CN 205017275 U CN205017275 U CN 205017275U
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Abstract
The utility model discloses an on -vehicle power amplifier module, it includes DSP treatment circuit, bluetooth circuit, power and control circuit and power amplifier circuit, on -vehicle sound source is connected to the first input end of DSP treatment circuit, and the bluetooth circuit is connected to the second input, and the output passes through power amplifier circuit and connects the speaker, and power and control circuit are the power supply of whole on -vehicle power amplifier module, the bluetooth circuit passes through bluetooth signal connection to cell -phone. This scheme can carry out the function adjustment, realize multiple different effects, be applicable to all on -vehicle audio circuit after designing and completing.
Description
Technical field
The utility model relates to automobile circuit structure, especially relates to a kind of vehicle-mounted power amplifier module that can realize more effect.
Background technology
Vehicle power amplifier and power of vehicle amplifier, in order to amplify automobile audio power, reach desirable vehicle-mounted effect.Traditional onboard audio power amplifier have employed analog signal amplification principle and amplifies vehicle-mounted CD source of sound and reduce, and the simple but function singleness of circuit, cannot carry out function adjustment in after having designed.
State Intellectual Property Office of the People's Republic of China discloses on December 03rd, 2014 patent documentation (publication number CN203984360U) that name is called " the transistor vehicle power amplifier circuit without impact sound generated in switching process ", it comprises: a constant-current source module, and an optocoupler control module, wherein said constant-current source module is provided with a symmetrical difference channel, optocoupler is controlled by optocoupler control circuit, after constant-current source module receives the signal of optocoupler, open work.This scheme still cannot carry out function adjustment after design completes.
Summary of the invention
The utility model mainly solves the technical problem of the comparatively single grade of function existing for prior art, provides a kind of and can carry out function adjustment after having designed, realizes the vehicle-mounted power amplifier module of multiple different-effect.
The utility model is mainly solved by following technical proposals for above-mentioned technical problem: a kind of vehicle-mounted power amplifier module, comprise DSP treatment circuit, Bluetooth circuit, power supply and control circuit and power amplifier, the first input end of described DSP treatment circuit connects vehicle-mounted source of sound, second input connects Bluetooth circuit, output connects loud speaker by power amplifier, and power supply and control circuit are that whole vehicle-mounted power amplifier module is powered; Bluetooth circuit is connected to mobile phone by Bluetooth signal.
As preferably, described DSP treatment circuit comprises ADAU1701 chip, 2 pin of ADAU1701 chip connect vehicle-mounted source of sound by resistance R1,4 pin connect Bluetooth circuit by resistance R2,43 pin, 44 pin, 45 pin and 46 pin are respectively connected power amplifier by a filter circuit, and 22 pin and 23 pin are connected to the control end of power supply and control circuit by I2C bus.
As preferably, described power amplifier comprises four D class power amplifier electronic circuits, and the input of each power amplifier electronic circuit connects the output of filter circuit, and output connects loud speaker.
As preferably, described filter circuit comprises the first electric capacity, the second electric capacity and the first resistance, the positive pole of described first electric capacity connects ADAU1701 chip, negative pole connects the first end of the first resistance, second end of the first resistance connects D class power amplifier electronic circuit, the first end of the second electric capacity connects the second end of the first resistance, the second end ground connection of the second electric capacity.
The power amplifier that this programme has exported after having designed is common-mode, can be used for any automobile-used field, then carries out functional programming to DSP and realizes different usage.Common-mode is the 2 stereo inputs in road, and 4 tunnels export.The general full range that is set to responds the stereo output in 2*2 road.By to dsp program, realize the frequency response that 4 tunnels export, effect etc.
A such as chassis needs front sound field to adopt 50Hz high pass response, rear sound field is adopted to the vehicle power amplifier of 100Hz lowpass response.Traditional mode is that 4 tunnels are exported by the pattern of Active crossover the pattern being set as needing by signal, is then finely tuned by potentiometer, once circuit design completes, cannot change function.But adopt the circuit of DSP process, no matter client needs how to change, and all can carry out calculation process to signal in DSP.Such as client needs the function increasing a subwoofer suppression and bass boost on the passage of low pass, traditional design, because circuit completes, cannot be changed, can only from new design, but DSP is just very simple, redesign is carried out to DSP and can obtain required pattern.Result is exactly the requirement of traditional mode due to client, and can produce a lot because function is different, the different version of power, generates a lot of model.Adopt DSP just only can produce the model produced because power is different to distinguish.So very large facility is brought to plant produced.Particularly phase before manufacture, because market reaction is inconsistent, Conventional amplifiers needs to change circuit to adapt to customer requirement, and the cycle very long and product having completed production cannot use.But adopt DSP process only to need reprogramming, fast and the product having completed production is appointed so available.Avoid overstocking waste.
Bluetooth module is added power amplifier by this programme, realizes mobile phone connection control and playback.Feature is that all power amplifiers dispatched from the factory are same pattern, arrived user on hand time, installation personnel is had to carry out programing change to the requirement of different user and environment, change by mobile phone A PP in conjunction with the special debugging software of DSP, to DSP function setting, comprise the Power Limitation of power amplifier, frequency response, equalizer regulates, the functions such as effect process.Optimal pronunciation is realized to the actual conditions of client.Client can also download specific program and change power amplifier function, such as, add the change that reverberation effect etc. realizes music space in car.Mobile phone can also be connected power amplifier and carry out playback by client.
This programme adopts bluetooth module to connect mobile phone, by Bluetooth signal control MCU, the effects code required for MCU output is changed to DSP by I2C bus.Once change, MCU preserves current setting.
Power amplifier adopts double starting state, and when in car, audiogenic device is opened, power amplifier start-up also carries out amplification output to source of sound in car.When in car, audiogenic device is not opened, mobile phone by Bluetooth control power amplifier start-up and by blue tooth transmission audio frequency signal carry out amplification export.
The beneficial effect that the utility model brings is, can carry out function adjustment, realize multiple different-effect, have wider applicable surface after design completes.
Accompanying drawing explanation
Fig. 1 is a kind of structured flowchart of the present utility model;
Fig. 2 is a kind of DSP treatment circuit figure of the present utility model;
In figure: 1, DSP treatment circuit, 2, Bluetooth circuit, 3, power supply and control circuit, 4, power amplifier, 5, vehicle-mounted source of sound, 6, mobile phone, 7, loud speaker.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: the vehicle-mounted power amplifier module of one of the present embodiment, as shown in Figure 1, comprise DSP treatment circuit 1, Bluetooth circuit 2, power supply and control circuit 3 and power amplifier 4, the first input end of described DSP treatment circuit connects vehicle-mounted source of sound 5, second input connects Bluetooth circuit, output connects loud speaker 7 by power amplifier, and power supply and control circuit are that whole vehicle-mounted power amplifier module is powered; Bluetooth circuit is connected to mobile phone 6 by Bluetooth signal.
As shown in Figure 2, DSP treatment circuit comprises ADAU1701 chip, 2 pin of ADAU1701 chip connect vehicle-mounted source of sound by resistance R1,4 pin connect Bluetooth circuit by resistance R2,43 pin, 44 pin, 45 pin and 46 pin are respectively connected power amplifier by a filter circuit, and 22 pin and 23 pin are connected to the control end of power supply and control circuit by I2C bus.Filter circuit comprises the first electric capacity, the second electric capacity and the first resistance, the positive pole of described first electric capacity connects ADAU1701 chip, negative pole connects the first end of the first resistance, second end of the first resistance connects D class power amplifier electronic circuit, the first end of the second electric capacity connects the second end of the first resistance, the second end ground connection of the second electric capacity.
Chip internal is built-in various modes, by I2C bus marco mode of operation.Stereophonic signal is inputted by 24 pin, then through internal mode number conversion be digital signal, then by DSP process, process comprise gain, frequency response, EQ, communication channel delay, the effects such as reverberation.Through internal Digital To Analog conversion, export 4 road analog signal outputs.Device connection class-D amplifier carries out amplification output after filtering.
Power amplifier comprises four D class power amplifier electronic circuits, and the input of each power amplifier electronic circuit connects the output of filter circuit, and output connects loud speaker.
This programme adopts power supply on vehicle, is worked by in-vehicle device control appliance.In car, source of sound input DSP module exports class-D amplifier to and pronounces to loud speaker after processing.Linked by bluetooth and MCU at mobile phone, controlled by mobile phone A PP, change DSP audio processing mode.Be provided with rear preservation.When arranging, power amplifier is quiet.After being provided with, music signal exports by the pattern arranged.When source of sound in car is closed, power amplifier is closed.But bluetooth module and MCU module are in low-power consumption standby state.After mobile phone connects, export control signal by mobile phone and activate power amplifier work.Bluetooth now can be used to carry out music.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Although more employ the terms such as DSP treatment circuit, Bluetooth circuit herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present utility model more easily; The restriction that they are construed to any one additional is all contrary with the utility model spirit.
Claims (4)
1. a vehicle-mounted power amplifier module, it is characterized in that, comprise DSP treatment circuit, Bluetooth circuit, power supply and control circuit and power amplifier, the first input end of described DSP treatment circuit connects vehicle-mounted source of sound, second input connects Bluetooth circuit, output connects loud speaker by power amplifier, and power supply and control circuit are that whole vehicle-mounted power amplifier module is powered; Bluetooth circuit is connected to mobile phone by Bluetooth signal.
2. the vehicle-mounted power amplifier module of one according to claim 1, it is characterized in that, described DSP treatment circuit comprises ADAU1701 chip, 2 pin of ADAU1701 chip connect vehicle-mounted source of sound by resistance R1,4 pin connect Bluetooth circuit by resistance R2,43 pin, 44 pin, 45 pin and 46 pin are respectively connected power amplifier by a filter circuit, and 22 pin and 23 pin are connected to the control end of power supply and control circuit by I2C bus.
3. the vehicle-mounted power amplifier module of one according to claim 2, is characterized in that, described power amplifier comprises four D class power amplifier electronic circuits, and the input of each power amplifier electronic circuit connects the output of filter circuit, and output connects loud speaker.
4. the vehicle-mounted power amplifier module of the one according to Claims 2 or 3, it is characterized in that, described filter circuit comprises the first electric capacity, the second electric capacity and the first resistance, the positive pole of described first electric capacity connects ADAU1701 chip, negative pole connects the first end of the first resistance, second end of the first resistance connects D class power amplifier electronic circuit, and the first end of the second electric capacity connects the second end of the first resistance, the second end ground connection of the second electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520653592.7U CN205017275U (en) | 2015-08-27 | 2015-08-27 | On -vehicle power amplifier module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520653592.7U CN205017275U (en) | 2015-08-27 | 2015-08-27 | On -vehicle power amplifier module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205017275U true CN205017275U (en) | 2016-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520653592.7U Expired - Fee Related CN205017275U (en) | 2015-08-27 | 2015-08-27 | On -vehicle power amplifier module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205017275U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115278473A (en) * | 2022-07-27 | 2022-11-01 | 重庆电子工程职业学院 | Bluetooth stereo system |
-
2015
- 2015-08-27 CN CN201520653592.7U patent/CN205017275U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115278473A (en) * | 2022-07-27 | 2022-11-01 | 重庆电子工程职业学院 | Bluetooth stereo system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170927 Address after: Hangzhou City, Zhejiang Province, the 311201 economic and Technological Development Zone Xiaoshan District Road No. 77 Patentee after: Hangzhou Manko Technology Co.,Ltd. Address before: Hangzhou City, Zhejiang Province, the 311201 economic and Technological Development Zone Xiaoshan District Road No. 77 Patentee before: HANGZHOU MANKO ELECTRONICS CO., LTD. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160203 Termination date: 20200827 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |