CN204376842U - Multi-channel digital decode power amplifier - Google Patents
Multi-channel digital decode power amplifier Download PDFInfo
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- CN204376842U CN204376842U CN201520068800.7U CN201520068800U CN204376842U CN 204376842 U CN204376842 U CN 204376842U CN 201520068800 U CN201520068800 U CN 201520068800U CN 204376842 U CN204376842 U CN 204376842U
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Abstract
The utility model discloses a kind of multi-channel digital decode power amplifier, comprise casing and be arranged on the double-audible frequency device in casing, multi channel signals input module, signal switching module, Audio Input Modules, central processing unit, video input output module, display module, power module, key-press module and power amplifier module, described multi channel signals input module, Audio Input Modules, central processing unit, video input output module and display module are electrically connected with double-audible frequency device respectively, described power amplifier module is electrically connected with signal switching module, described key-press module is electrically connected with double-audible frequency device and central processing unit respectively, described power module is electrically connected with double-audible frequency device and central processing unit respectively.The utility model adopts multichannel input circuit and double-audible frequency device to combine, and realizes signal decoding compatibility, improves the practicality of power amplifier.
Description
Technical field
The utility model relates to a kind of multi-channel digital decode power amplifier, belongs to sound appliances technical field.
Background technology
Existing power amplifier great majority are made up of multiple signals input circuit and power amplifier module, and signal exports through loud speaker by multi-channel input circuit after power amplifier module amplifies.This power amplifier can meet general user's needs, but its shortcoming is: multiple signals input circuit all needs to connect independently decoder and exports through power amplifier after could decoding to audio signal, decoding is inconvenient, and multi-channel input circuit can not freely switch, and impact uses.
Utility model content
The deficiency that the utility model exists to overcome prior art, provides a kind of multi-channel digital decode power amplifier.
The utility model is achieved by taking following technical scheme:
A kind of multi-channel digital decode power amplifier, comprise casing and be arranged on the double-audible frequency device in casing, multi channel signals input module, signal switching module, Audio Input Modules, central processing unit, video input output module, display module, power module, key-press module and power amplifier module, described multi channel signals input module, Audio Input Modules, central processing unit, video input output module and display module are electrically connected with double-audible frequency device respectively, described power amplifier module is electrically connected with signal switching module, described key-press module is electrically connected with double-audible frequency device and central processing unit respectively, described power module is electrically connected with double-audible frequency device and central processing unit respectively.
Preferably, described multi channel signals input module comprises 7.1 sound channel signal input circuits, CD signal input circuit, AUX signal input circuit, and described 7.1 sound channel signal input circuits, CD signal input circuit, AUX signal input circuit are electrically connected with signal switching module respectively.
Preferably, described signal switching module comprises analog signal commutation circuit and multi channel signals commutation circuit, described analog signal commutation circuit and multi channel signals commutation circuit are all electrically connected with double-audible frequency device, described 7.1 sound channel signal input circuits are electrically connected with multi channel signals commutation circuit, described CD signal input circuit, AUX signal input circuit are electrically connected with analog signal commutation circuit respectively, and described power amplification circuit is electrically connected with multi channel signals commutation circuit.
Preferably, this multi-channel digital decode power amplifier also comprises RS-232 interface circuit, and described RS-232 interface circuit is electrically connected with double-audible frequency device.
Compared with prior art, the beneficial effects of the utility model are: the utility model adopts multichannel input circuit and double-audible frequency device to combine, the signal inputted by multichannel input circuit can be exported by loudspeaker through the decoding of double-audible frequency device after power amplifier amplifies again, realize signal decoding compatibility, improve the practicality of power amplifier, be applicable to small size room movie theatre power amplifier.
Accompanying drawing explanation
Fig. 1 is the structural representation of multi-channel digital decode power amplifier of the present utility model;
Fig. 2 is the circuit block diagram of multi-channel digital decode power amplifier of the present utility model;
Fig. 3 is the circuit diagram of double-audible frequency device of the present utility model;
Fig. 4 is the circuit diagram of signal switching module of the present utility model;
Fig. 5 is the circuit diagram of video input output module of the present utility model;
Fig. 6 is the circuit diagram of power module of the present utility model;
Fig. 7 is the circuit diagram of display module of the present utility model;
Fig. 8 is the circuit diagram of power amplifier module of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, most preferred embodiment of the present utility model is described in detail.
As Fig. 1, shown in Fig. 2, the multi-channel digital decode power amplifier of the present embodiment, comprise casing 1 and be arranged on the double-audible frequency device 2 in casing 1, multi channel signals input module, signal switching module, Audio Input Modules, central processing unit, video input output module 3, display module 4, power module 5, key-press module 6 and power amplifier module 7, described multi channel signals input module, Audio Input Modules, central processing unit, video input output module 3 and display module 4 are electrically connected with double-audible frequency device 2 respectively, described power amplifier module 7 is electrically connected with signal switching module, described key-press module 6 is electrically connected with double-audible frequency device 2 and central processing unit respectively, described power module 5 is electrically connected with double-audible frequency device 2 and central processing unit respectively, described multi channel signals input module comprises 7.1 sound channel signal input circuits, CD signal input circuit, AUX signal input circuit, and described 7.1 sound channel signal input circuits, CD signal input circuit, AUX signal input circuit are electrically connected with signal switching module respectively, described signal switching module comprises analog signal commutation circuit and multi channel signals commutation circuit, described analog signal commutation circuit and multi channel signals commutation circuit are all electrically connected with double-audible frequency device 2, described 7.1 sound channel signal input circuits are electrically connected with multi channel signals commutation circuit, described CD signal input circuit, AUX signal input circuit are electrically connected with analog signal commutation circuit respectively, and described power amplification circuit is electrically connected with multi channel signals commutation circuit.This multi-channel digital decode power amplifier also comprises RS-232 interface circuit, and described RS-232 interface circuit is electrically connected with double-audible frequency device.Input signal is transported to after the decoding of double-audible frequency device through multi channel signals commutation circuit and is exported by loudspeaker after power amplifier amplifies by 7.1 sound channel signal input circuits, input signal to be all transported to after double-audible frequency device decodes through analog signal commutation circuit by CD signal input circuit and AUX signal input circuit, then is undertaken exporting through loudspeaker after circuit selects power amplifier to amplify by multi channel signals commutation circuit; Exported by loudspeaker after power amplifier amplification by multi channel signals commutation circuit selector channel after Audio Input Modules conveying audio signal carries out audio decoder to double-audible frequency device, video input output module carries out video switch through vision signal commutation circuit and is transported to after double-audible frequency device is decoded and exports through audio-video signal commutation circuit; Central processing unit and key-press module are mainly used in peripheral operation, and regulate and control whole amplifier, power module is then powered for whole amplifier.
As shown in Figure 3, the double-audible frequency device of the present embodiment adopts the audio decoder in pairs of DTS and DOLBY audio decoder, this double-audible frequency device is integrated on CIRRUS LOGIC C497 family chip, it can support the audio effect processing pattern such as Dolby EX, Dolby Digital5.1, DTS-ES, DTS5.1, Dolby PL2X, DSP7.1MODE, DTS NEO6, be provided with automatic signal form DOLBY/DTS/PCM to decode, jointly be integrated on same silicon chip as high-speed dsp, keep advanced simulated performance simultaneously.This double-audible frequency utensil has new continuous-time architecture, can improve the isolation between transducer and DSP, realizes the high-performance of DSP, and affects the performance of transducer hardly.Four-way analog to digital converter can realize the dynamic range of 105dB and the THD+N of-98dB, and the dynamic range of eight port number weighted-voltage D/A converters is 108dB, THD+N is-98dB.This two indices is all very outstanding in SOC product, is all better than any best independent multi-channel decoder on current market, adopts double-core 32-BIT technology.
As shown in Figure 4, the signal switching module of the present embodiment adopts the R2A15218FP chip of RENESAS product, AUX signal is input to 58,59 pin of chip R2A15218FP, CD signal is input to 60,61 pin, two paths of signals is delivered to analog signal and is switched, and the signal after switching is exported by 90,91 pin of R2A15218FP and delivers in pairs on audio decoder.Analog signal switching is delivered in 7.1 signal inputs or multi channel signals switches, selected signal is delivered to volume adjusting and is controlled, each step of volume adjusting is 0.5dB, tone regulable control is delivered to after sending volume adjusting, each step that tone regulates is 2dB, always total ± 14dB, then volume adjusting is entered after tone regulable control, export from 21 of R2A15218FP, 23 pin after volume adjusting.The signal of 7.1 sound channels is from 36 to the 43 pin inputs of R2A15218FP, and the signal of another road 7.1 sound channel switches from delivering to multi channel signals after double-audible frequency device outputs to 93 to 100 pin inputs.
As shown in Figure 5, the video input output module of the present embodiment comprises three road video signal input circuits, vision signal commutation circuit and video signal output circuit, three tunnel vision signal inputs enter 9,14,16 pin of chip 3U01/NJM2293 respectively through 3C01,3C02,3C03, then choose required audio-video signal source by 3,12 pin of host CPU control chip 3U01/NJM2293.1 pin through chip 3U01/NJM2293 after choosing signal source outputs on TV.RS-232 interface is used to product up-gradation and regulates internal acoustic field effect, can also make transfer of data and use, can connect the Based Intelligent Control port of terminal control.
As shown in Figure 6, the power module of the present embodiment comprises the circuit formations such as power rectifier circuit, electric source filter circuit, pfc circuit, switching tube, switch transformer, lower pressure rectifier circuit, low-voltage filter circuit.Power acquisition switch mode power, efficiency reaches more than 85%, and ad hoc have pfc circuit, PFC be exactly between fundamental current by making interchange input and voltage phase difference reduce to improve power factor, thus make product in use more stable.Ultralow stand-by power consumption, meets the ERP II requirement of European Union.
As shown in Figure 7, in the present embodiment, display, display driver circuit, infrared receiver, button control section are accomplished on one piece of PCB, and display section adopts VFD display mode, and the driving of VFD has been come by 2U01.Power supply receives PLUG09 socket from Switching Power Supply plate, and the voltage of 4.5V is fed to the filament of VFD, and negative 23V voltage delivers to the negative electrode of 2U01, is used as to drive VFD.Infrared signal receives to have been come by 2IR01, delivers on host CPU and carry out reading code after receiving signal.Button adopts scan mode to realize, and Dynamic System gets up more directly perceived.Be located in apparatus front panel by key control, have STANDY, SOURCE+, SOURCE-, TEST, MODE, DSP, VOLUME+, VOLUME-respectively.Operate and follow one's bent, convenient and swift, infrared remote controller can also be adopted to operate.
As shown in Figure 8, the NJM4558 that the power amplifier module of the present embodiment adopts JRC to produce makes signal amplifier, and the wide-voltage range of its supply power voltage ± 4V to ± 18V, signal to noise ratio is up to 90dB.The TDA8950 rate of doing work amplifier that digital power amplifier adopts NXP to produce, power output is 2*150W, inside establishes overcurrent protection and overheating protection circuit, has internal oscillator circuit or connects outside vibration, be also provided with MODE circuit.
Claims (4)
1. a multi-channel digital decode power amplifier, it is characterized in that the double-audible frequency device comprising casing and be arranged in casing, multi channel signals input module, signal switching module, Audio Input Modules, central processing unit, video input output module, display module, power module, key-press module and power amplifier module, described multi channel signals input module, Audio Input Modules, central processing unit, video input output module and display module are electrically connected with double-audible frequency device respectively, described power amplifier module is electrically connected with signal switching module, described key-press module is electrically connected with double-audible frequency device and central processing unit respectively, described power module is electrically connected with double-audible frequency device and central processing unit respectively.
2. multi-channel digital decode power amplifier according to claim 1, it is characterized in that described multi channel signals input module comprises 7.1 sound channel signal input circuits, CD signal input circuit, AUX signal input circuit, described 7.1 sound channel signal input circuits, CD signal input circuit, AUX signal input circuit are electrically connected with signal switching module respectively.
3. multi-channel digital decode power amplifier according to claim 2, it is characterized in that described signal switching module comprises analog signal commutation circuit and multi channel signals commutation circuit, described analog signal commutation circuit and multi channel signals commutation circuit are all electrically connected with double-audible frequency device, described 7.1 sound channel signal input circuits are electrically connected with multi channel signals commutation circuit, described CD signal input circuit, AUX signal input circuit are electrically connected with analog signal commutation circuit respectively, and described power amplification circuit is electrically connected with multi channel signals commutation circuit.
4. multi-channel digital decode power amplifier according to any one of claim 1 to 3, characterized by further comprising RS-232 interface circuit, and described RS-232 interface circuit is electrically connected with double-audible frequency device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520068800.7U CN204376842U (en) | 2015-01-30 | 2015-01-30 | Multi-channel digital decode power amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520068800.7U CN204376842U (en) | 2015-01-30 | 2015-01-30 | Multi-channel digital decode power amplifier |
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| CN204376842U true CN204376842U (en) | 2015-06-03 |
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| CN201520068800.7U Active CN204376842U (en) | 2015-01-30 | 2015-01-30 | Multi-channel digital decode power amplifier |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108989948A (en) * | 2018-08-08 | 2018-12-11 | 福建科立讯通信有限公司 | A kind of the voice-grade channel switching realization circuit and method of digital walkie-talkie |
| CN111918172A (en) * | 2020-07-28 | 2020-11-10 | 广东联达科控股有限公司 | Singlechip car power amplifier |
-
2015
- 2015-01-30 CN CN201520068800.7U patent/CN204376842U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108989948A (en) * | 2018-08-08 | 2018-12-11 | 福建科立讯通信有限公司 | A kind of the voice-grade channel switching realization circuit and method of digital walkie-talkie |
| CN108989948B (en) * | 2018-08-08 | 2024-03-08 | 福建科立讯通信有限公司 | Audio channel switching realization circuit and method for digital interphone |
| CN111918172A (en) * | 2020-07-28 | 2020-11-10 | 广东联达科控股有限公司 | Singlechip car power amplifier |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 510000, Guangzhou, Guangdong province Huadu District charcoal step Feida Industrial Park Patentee after: GUANGZHOU FEIDA SOUND CO., LTD. Address before: 510000, Guangzhou, Guangdong province Huadu District charcoal step Feida Industrial Park Patentee before: Guangzhou Fidek Professional Audio Equipment Co., Ltd. |