CN202374223U - Fully digital audio amplification circuit for household active speakers - Google Patents
Fully digital audio amplification circuit for household active speakers Download PDFInfo
- Publication number
- CN202374223U CN202374223U CN201120503957XU CN201120503957U CN202374223U CN 202374223 U CN202374223 U CN 202374223U CN 201120503957X U CN201120503957X U CN 201120503957XU CN 201120503957 U CN201120503957 U CN 201120503957U CN 202374223 U CN202374223 U CN 202374223U
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- audio
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- processing circuit
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Abstract
The utility model discloses a fully digital audio amplification circuit for household active speakers, which is characterized by comprising a system synchronous clock signal, a micro control unit, a digital audio receiver, a digital signal processing circuit, a digital audio amplifier circuit and a low pass filter. The system synchronous clock signal is used for guaranteeing clocks among all modules to be synchronous, so that all modules work with the same clock; the micro processing unit is used for controlling working conditions of all modules; the digital audio amplifier circuit is used for amplifying digital audio signals sent by the digital signal processing circuit, and the signals are output as pulse width modulation (PWM) signals; and the low pass filter is used for demodulating the PWM signals output by the digital audio amplifier circuit, so that the PWM signals become sine wave analog audio signals to propel speakers. The fully digital audio amplification circuit has the advantages of being simple in design and energy saving, reducing the distortion of conversion, and the like.
Description
Technical field
The utility model relates to a kind of family expenses active audio amplifier audio amplifier circuit, says that more specifically relating to a kind of family expenses active audio amplifier uses digital audio amplifier circuit.
Background technology
Present family expenses active audio amplifier circuit mainly divides two types, and one type is the analog signal input, and the power amplifier partial circuit also is the analog amplifier circuit, directly analog signal is amplified to promote the loud speaker pronunciation.Another kind of is analog signal input; Power amplifier partly is the D class amplification circuit; Though this type power amplifier efficient simulation is high,, converts digital signal into analog signal output and offer active audio amplifier can when audio frequency apparatus is exported, need digital signal be carried out D/A switch; Before power amplification, also need analog signal be modulated into pwm signal or other modulation signal amplifies, at last through promoting the loud speaker pronunciation after the passive low ventilating filter filtering.The first kind, its shortcoming are that power consumption is high, do not meet the low-carbon environment-friendly that the present public advocates, if adding EQ debugs, its complicated circuit if multistage EQ adjustment is just more complicated, also should not be adjusted in addition.Second type, in digital-to-analog signal conversion and PWM modulation treatment, can receive the interference of outside noise, noise that conversion own also can bring and distortion so the sound that popular now general evaluation D class power amplifier gone out is more short-tempered, are also deposited the shortcoming that EQ should not adjust simultaneously.
Summary of the invention
The purpose of the utility model is: provide a kind of family expenses active audio amplifier to use digital audio amplifier circuit, have the shortcoming that power consumption is high, noise is big and EQ should not adjust in the prior art to solve.
Reaching the technical scheme that the purpose of the utility model takes is: a kind of family expenses active audio amplifier is used digital audio amplifier circuit; It is characterized in that; Comprise: system synchronization clock signal, microprocessor, digital audio receiver, digital signal processing circuit, digital audio-power amplifier circuit and low pass filter; The system synchronization clock signal is to be used for guaranteeing the clock synchronization between each module, and each module is operated under the same clock; Microprocessor is the operating state that is used for controlling each module; Digital audio receiver is to be used for receiving the S/PDIF digital audio and video signals from optical fiber, axle, converts these digital audio and video signals into international I
2The S audio data stream is narrated to digital signal processing circuit; Digital signal processing circuit is connected with microprocessor, receives its operating state of microprocessor control, be used for to DAB carry out audio decoder, audio is handled and the adjustment of EQ, with the signal of handling well equally with I
2The S audio data stream is transferred to the digital audio-power amplifier circuit; The digital audio-power amplifier circuit is used for the digital audio and video signals that the amplifier digital signal processing circuit sends here, exports with pwm signal; Low pass filter is used for the pwm signal of demodulation digital audio-power amplifier output, makes it become sinusoidal wave simulated audio signal and promotes loud speaker.
The beneficial effect that the utility model reaches is: adopt to the utlity model has following advantage.
1. digital audio receiver, digital signal processing circuit and power amplifier all adopt the finished product integrated circuit, so simplicity of design.
2. directly reception sources without D/A switch, has reduced slewing distortion from the digital signal of audio & video equipment.
3. begin from input that all signals are digital signal before the low pass filter,, guaranteed can not be interfered in the audio signal transmission process, also do not have distortion so antijamming capability is strong.
4. the efficient of digital audio-power amplifier can reach more than 95%. energy-conserving and environment-protective.
5. the powerful Audio Processing ability of digital signal processing circuit chip needs only the requirement that simply can reach reservation with the microprocessor setting.Be that the simulation sound effect processing circuit is incomparable.
Description of drawings
Fig. 1: the circuit block diagram of the utility model.
Embodiment
The architectural feature of the utility model more at large is described below in conjunction with accompanying drawing.
A kind of family expenses active audio amplifier is used digital audio amplifier circuit; It is characterized in that; Comprise: system synchronization clock signal (MCLK) 1, microprocessor (MCU) 2, digital audio receiver (DAR) 3, digital signal processing circuit (DSP) 4 and digital audio-power amplifier circuit 5, low pass filter (LPF) 6, system synchronization clock signal (MCLK) 1; Be to be used for guaranteeing the clock synchronization between each module, each module is operated under the same clock; Microprocessor (MCU) the 2nd is used for controlling the operating state of each module; Digital audio receiver (DAR) 3 is to be used for receiving the S/PDIF digital audio and video signals from optical fiber, axle, converts these digital audio and video signals into international I
2The S audio data stream is narrated to digital signal processing circuit (DSP) 4; Digital signal processing circuit (DSP) 4 is connected with microprocessor (MCU) 2, receives its operating states of microprocessor (MCU) 2 control, be used for to DAB carry out audio decoder, processing and the adjustment of EQ, with the signal of handling well equally with I
2The S audio data stream is transferred to the digital audio-power amplifier circuit; Digital audio-power amplifier circuit 5 is used for the digital audio and video signals that amplifier digital signal processing circuit (DSP) 4 sends here, exports with pwm signal; Low pass filter (LPF) 6 is used for the pwm signal of demodulation digital audio-power amplifier output, makes it become sinusoidal wave simulated audio signal and promotes loud speaker.
Claims (1)
1. a family expenses active audio amplifier is used digital audio amplifier circuit; It is characterized in that; Comprise: system synchronization clock signal, microprocessor, digital audio receiver, digital signal processing circuit, digital audio-power amplifier and low pass filter; The system synchronization clock signal is to be used for guaranteeing the clock synchronization between each module, and each module is operated under the same clock; Microprocessor is the operating state that is used for controlling each module; Digital audio receiver is to be used for receiving the S/PDIF digital audio and video signals from optical fiber, axle, converts these digital audio and video signals into international I
2The S audio data stream is transferred to digital signal processing circuit; Digital signal processing circuit is connected with microprocessor, receives its operating state of microprocessor control, be used for to DAB carry out audio decoder, audio is handled and the adjustment of EQ, with the signal of handling well equally with I
2The S audio data stream is transferred to the digital audio-power amplifier circuit; Digital audio-power amplifier is used for the digital audio and video signals that the amplifier digital signal processing circuit sends here, exports with pwm signal; Low pass filter is used for the pwm signal of demodulation digital audio-power amplifier output, makes it become sinusoidal wave simulated audio signal and promotes loud speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120503957XU CN202374223U (en) | 2011-12-07 | 2011-12-07 | Fully digital audio amplification circuit for household active speakers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120503957XU CN202374223U (en) | 2011-12-07 | 2011-12-07 | Fully digital audio amplification circuit for household active speakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202374223U true CN202374223U (en) | 2012-08-08 |
Family
ID=46597914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120503957XU Expired - Fee Related CN202374223U (en) | 2011-12-07 | 2011-12-07 | Fully digital audio amplification circuit for household active speakers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202374223U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104452A (en) * | 2014-06-24 | 2014-10-15 | 深圳市中兴移动通信有限公司 | Audio demodulation method based on PWM modulation and demodulator |
| CN107264391A (en) * | 2017-06-02 | 2017-10-20 | 杭州蓝海特种车辆有限公司 | A kind of vehicle-mounted siren of sine wave and its processing method |
| CN107343245A (en) * | 2017-08-28 | 2017-11-10 | 东莞中拓机械技术开发有限公司 | A kind of double PWM unit power amplifier modules of pulsewidth modulation |
| CN107346958A (en) * | 2017-08-31 | 2017-11-14 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 600W+150W (DSP) power amplifier module |
| CN107347172A (en) * | 2017-08-31 | 2017-11-14 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 500W+500W (DSP) power amplifier module |
| CN107360502A (en) * | 2017-08-30 | 2017-11-17 | 东莞中拓机械技术开发有限公司 | A kind of double 1000W (IR2) the power amplifier modules of pulsewidth modulation |
| CN108649935A (en) * | 2018-05-03 | 2018-10-12 | 成都黎声科技有限公司 | A kind of system and method that digital audio and video signals are directly modulated into PWM waveform |
| CN116055950A (en) * | 2022-05-11 | 2023-05-02 | 荣耀终端有限公司 | Speaker driving circuit and electronic device |
-
2011
- 2011-12-07 CN CN201120503957XU patent/CN202374223U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104452A (en) * | 2014-06-24 | 2014-10-15 | 深圳市中兴移动通信有限公司 | Audio demodulation method based on PWM modulation and demodulator |
| CN104104452B (en) * | 2014-06-24 | 2016-08-24 | 努比亚技术有限公司 | Audio demodulation method based on PWM and demodulator |
| CN107264391A (en) * | 2017-06-02 | 2017-10-20 | 杭州蓝海特种车辆有限公司 | A kind of vehicle-mounted siren of sine wave and its processing method |
| CN107343245A (en) * | 2017-08-28 | 2017-11-10 | 东莞中拓机械技术开发有限公司 | A kind of double PWM unit power amplifier modules of pulsewidth modulation |
| CN107343245B (en) * | 2017-08-28 | 2023-12-22 | 东莞精恒电子有限公司 | Pulse width modulation double PWM unit power amplifier module |
| CN107360502A (en) * | 2017-08-30 | 2017-11-17 | 东莞中拓机械技术开发有限公司 | A kind of double 1000W (IR2) the power amplifier modules of pulsewidth modulation |
| CN107360502B (en) * | 2017-08-30 | 2023-12-22 | 东莞精恒电子有限公司 | Pulse width modulation double 1000W (IR 2) power amplifier module |
| CN107347172A (en) * | 2017-08-31 | 2017-11-14 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 500W+500W (DSP) power amplifier module |
| CN107347172B (en) * | 2017-08-31 | 2023-12-22 | 东莞精恒电子有限公司 | Pulse width modulation 500W+500W (DSP) power amplifier module |
| CN107346958A (en) * | 2017-08-31 | 2017-11-14 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 600W+150W (DSP) power amplifier module |
| CN108649935A (en) * | 2018-05-03 | 2018-10-12 | 成都黎声科技有限公司 | A kind of system and method that digital audio and video signals are directly modulated into PWM waveform |
| CN116055950A (en) * | 2022-05-11 | 2023-05-02 | 荣耀终端有限公司 | Speaker driving circuit and electronic device |
| CN116055950B (en) * | 2022-05-11 | 2023-10-17 | 荣耀终端有限公司 | Speaker driving circuit and electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20121207 |