CN201294492Y - D genus power amplifier with wireless digital tone source input - Google Patents
D genus power amplifier with wireless digital tone source input Download PDFInfo
- Publication number
- CN201294492Y CN201294492Y CNU2008201674213U CN200820167421U CN201294492Y CN 201294492 Y CN201294492 Y CN 201294492Y CN U2008201674213 U CNU2008201674213 U CN U2008201674213U CN 200820167421 U CN200820167421 U CN 200820167421U CN 201294492 Y CN201294492 Y CN 201294492Y
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- wireless
- digital
- wireless digital
- input
- power amplifier
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Abstract
The utility model relates to a D-class power amplifier relating to the wireless digital sound source input, an existing product has big interference and high cost. The amplifier comprises a wireless digital sound source emitter which is connected with signals and a D-class power amplifier of the wireless digital sound source input. A wireless digital sound source receiving and converting device and an analogue input D-class power amplifier are arranged in the D-class power amplifier of the wireless digital sound source input. The wireless digital sound source emitter comprises digital audio frequency codes and a wireless emitting control unit, a 2.4G wireless emitting chip, and a preceding audio frequency digital/analogue conversion unit. The wireless digital sound source receiving and converting device comprises the 2.4G wireless emitting chip, digital audio frequency decoding and wireless receiving control unit, and a subsequent audio frequency digital/analogue conversion unit. The D-class power amplifier does not need an analogue audio frequency signal transmission line, which prevents the interference input that the analogue signals input into the transmission line, and reduces the application costs.
Description
Technical field
The utility model belongs to electronic technology field, relate to audio frequency D power-like amplifier (power amplifier) device that a kind of source of sound adopts the wireless digital input, do not need the analog input line of traditional D class audio frequency power amplifier to connect audiogenic device, can be used for automobile audio, home theater, stage equipment.
Background technology
Existing D genus audio power amplifier (is called for short: D class power amplifier) be to need the input simulated audio signal, adopt then with the triangular wave of modulation usefulness and simulate comparison, obtain and relevant PWM (pulse width modulation) waveform of input analog signal voltage amplitude, directly drive the loud speaker sounding through power driving circuit.This power amplifier has very high efficient, can significantly improve the power problems of equipment, but existing D class power amplifier need use long analogue audio frequency incoming line and source of sound to be electrically connected, and D class power amplifier has very serious electromagnetic compatibility problem, to self, the analog input transmission line has very big interference, causes the essence tonequality of existing D class power amplifier to descend.Simultaneously long in actual use transmission line exists also feasible not attractive in appearance, and the practical application cost is higher.
Summary of the invention
The purpose of this utility model is exactly at the deficiencies in the prior art, and a kind of D power-like amplifier of wireless digital source of sound input is provided.
The utility model comprises wireless digital sound source transmitter and the wireless digital source of sound input D power-like amplifier that signal connects.Be provided with wireless digital source of sound receiving converter and analog input D power-like amplifier in the wireless digital source of sound input D power-like amplifier.
The wireless digital sound source transmitter comprises digital audio encoding and wireless transmission control unit, and 2.4G wireless transmission chip is connected with digital audio encoding and wireless transmission control unit signal with preceding audio frequency AD conversion unit.
Be provided with 2.4G wireless digital receiving chip in the wireless digital source of sound receiving converter, 2.4G the wireless digital receiving chip connects digital audio decoding and wireless receiving control unit with serial mode, back audio frequency D/A conversion unit is connected with digital audio decoding and wireless receiving control unit signal.
The utility model employing wireless digital audio frequency is imported and is replaced traditional analogue audio frequency input, saves the simulated audio signal transmission line between D power amplifier and source of sound, the The data of wireless digital source of sound input simultaneously error correction coding.The utility model does not need to adopt wire cable to be electrically connected between D class power amplifier, source of sound, efficiently solves connect up not aesthetic problem, interference and cable cost problem.The utility model has been avoided the interference of analog signal input transmission line, reduces D class power amplifier application cost, has guaranteed the efficient of D class power amplifier simultaneously.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of wireless digital sound source transmitter among Fig. 1;
Fig. 3 is the structural representation of wireless digital source of sound receiving converter among Fig. 1.
Embodiment
As Fig. 1, the D power-like amplifier of wireless digital source of sound input comprises wireless digital sound source transmitter 1 and the wireless digital source of sound input D power-like amplifier 2 that signal connects.Be provided with wireless digital source of sound receiving converter 3 and analog input D power-like amplifier 4 in the wireless digital source of sound input D power-like amplifier 2.
As Fig. 2, wireless digital sound source transmitter 1 comprises digital audio encoding and wireless transmission control unit 1-2, and 2.4G wireless transmission chip 1-3 is connected with digital audio encoding and wireless transmission control unit 1-2 signal with preceding audio frequency AD conversion unit 1-1.This part receives the simulated audio signal input earlier, earlier by preceding audio frequency analog to digital converter (audio A C), change into the pcm stream signal, handle through digital audio encoding and wireless transmission control unit, the MCU (model AT32U3B0128) that this unit mainly contains a slice Atmel company constitutes, directly connect 2.4G wireless transmission chip (RFZ of Nordic company) then, launch by sky bundle of lines wireless audio signal.
As Fig. 3, be provided with 2.4G wireless digital receiving chip 3-1 in the wireless digital source of sound receiving converter 3,2.4G wireless digital receiving chip 3-1 connects digital audio decoding and wireless receiving control unit 3-2 with serial mode, back audio frequency D/A conversion unit 3-3 is connected with digital audio decoding and wireless receiving control unit 3-2 signal.2.4G the wireless digital receiving chip adopts the 2.4G wireless chip nRF24Z1 of Nordic company to receive the digital audio signal that the source of sound end sends over, and carries out preliminary treatment.Digital audio decoding and wireless receiving control unit are made of a slice Atmel MCU of company (model AT32UC3B0128), by sending back audio frequency D/A conversion unit (audio frequency DAC) after this cell processing, obtain audio signal and send analog input D power-like amplifier.Analog input D power-like amplifier adopts traditional analog input D power-like amplifier, and analog input D power-like amplifier receives the analogue audio frequency input signal that does not disturb that the unit, front sends over, and through handling, promotes the loud speaker sounding.
Claims (1)
1, the D power-like amplifier of wireless digital source of sound input, comprise wireless digital sound source transmitter and wireless digital source of sound input D power-like amplifier that signal connects, it is characterized in that: be provided with wireless digital source of sound receiving converter and analog input D power-like amplifier in the wireless digital source of sound input D power-like amplifier;
The wireless digital sound source transmitter comprises digital audio encoding and wireless transmission control unit, and 2.4G wireless transmission chip is connected with digital audio encoding and wireless transmission control unit signal with preceding audio frequency AD conversion unit;
Be provided with 2.4G wireless digital receiving chip in the wireless digital source of sound receiving converter, 2.4G the wireless digital receiving chip connects digital audio decoding and wireless receiving control unit with serial mode, back audio frequency D/A conversion unit is connected with digital audio decoding and wireless receiving control unit signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201674213U CN201294492Y (en) | 2008-11-17 | 2008-11-17 | D genus power amplifier with wireless digital tone source input |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201674213U CN201294492Y (en) | 2008-11-17 | 2008-11-17 | D genus power amplifier with wireless digital tone source input |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201294492Y true CN201294492Y (en) | 2009-08-19 |
Family
ID=41007972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201674213U Expired - Fee Related CN201294492Y (en) | 2008-11-17 | 2008-11-17 | D genus power amplifier with wireless digital tone source input |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201294492Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545354A (en) * | 2012-01-13 | 2012-07-04 | 东南大学 | Wireless charging device of small-sized electronic equipment |
| CN103078929A (en) * | 2012-12-20 | 2013-05-01 | 广州普士全能音响设备有限公司 | Three-in-one audio set transmission control system |
-
2008
- 2008-11-17 CN CNU2008201674213U patent/CN201294492Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545354A (en) * | 2012-01-13 | 2012-07-04 | 东南大学 | Wireless charging device of small-sized electronic equipment |
| CN103078929A (en) * | 2012-12-20 | 2013-05-01 | 广州普士全能音响设备有限公司 | Three-in-one audio set transmission control system |
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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: 20090819 Termination date: 20111117 |