CN203618113U - Audio signal clipping control circuit device with power supply correlation - Google Patents
Audio signal clipping control circuit device with power supply correlation Download PDFInfo
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- CN203618113U CN203618113U CN201320699284.9U CN201320699284U CN203618113U CN 203618113 U CN203618113 U CN 203618113U CN 201320699284 U CN201320699284 U CN 201320699284U CN 203618113 U CN203618113 U CN 203618113U
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Abstract
The utility model discloses an audio signal clipping control circuit device with power supply correlation, which comprises an audio signal amplifying unit, a signal sampling unit and a terminal unit and further comprises a signal clipping control unit, wherein the output end of the audio signal amplifying unit is connected to the input end of the terminal unit, the output end of the terminal unit is connected to the input end of the signal sampling unit, and the output end of the signal sampling unit is connected to the input end of the signal clipping control unit; and the output end of the signal clipping control unit is connected to an input end of the audio signal amplifying unit, and another input end of the audio signal amplifying unit is connected to an audio input signal. The audio signal clipping control circuit with the power supply correlation has the advantages of simple structure, low cost, high reliability and high practicability, can overcome voltage reduction caused by instability of supply voltage, and achieves purpose of improving the tone quantity of the overall audio sound reproduction system and improving the reliability and the durability of the overall audio sound reproduction system.
Description
Technical field
The utility model relates to a kind of signal control circuit device, is specifically related to a kind of audio signal with power supply correlation and cuts top control circuit device.
Background technology
Each circuit and acoustics unit have that certain dynamically this is because electronic circuit essence determines, if signal level is excessively strong, exceed circuit allowed band (threshold value), signal just can not pass through smoothly, and its waveform is reamed a part, has just produced clipping distortion.Clipped signal enters after loud speaker, and its electric current is by loudspeaker voice coil, because the flip-flop in clipped signal can not make voice coil loudspeaker voice coil motion, its electric energy cannot convert mechanical energy to, thereby produce a large amount of heat energy, cause voice coil loudspeaker voice coil heating, if this clipping distortion is very serious, its direct current is larger, likely damage loud speaker voice unit, make its unit voice coil loudspeaker voice coil badly damaged phenomenon such as disconnected of coming unglued, ftracture or shake, make its sound distortion, voice unit is damaged, sometimes even thoroughly burn.If an audio signal amplifier is due to the unsettled voltage drop of supply power voltage itself, or cause because external terminate load is overweight in the situation that supply power voltage declines, the audio signal after amplification is all prone to cuts top distortion.At present, it is only to judge whether to occur cutting top distortion by signal magnitude that existing signal is cut top control technology, and the top distortion of cutting that can not cause amplifier supply power voltage decline fluctuation control effectively.This top distorted signal of cutting not only makes sound quality deterioration, and the high pitch loudspeaker of fragile terminal unit, thereby has reduced also reliability and the durability of system for electrical teaching of whole audio frequency.
Utility model content
The utility model has overcome the deficiencies in the prior art, provides to solve audio signal amplifier and occur that a kind of audio signal with power supply correlation of cutting the uncontrollable problem of top distortion cuts top control circuit device.
For solving above-mentioned technical problem, the utility model by the following technical solutions:
The audio signal with power supply correlation is cut a top control circuit device, comprises audio signal amplifying unit, signal sampling unit and terminal unit, also comprises that signal cuts top control unit; The output of described audio signal amplifying unit is connected with the input of described terminal unit, the output of described terminal unit is connected with the input of described signal sampling unit, and the input that the output of described signal sampling unit is cut top control unit with described signal is connected; The output that described signal is cut top control unit connects an input of described audio signal amplifying unit, and another input of described audio signal amplifying unit connects audio input signal.
Further technical scheme is that described terminal unit is: the ohmic load of audio frequency amplifier or the loudspeaker of audio frequency amplifier.
Further technical scheme is that described signal is cut between top control unit and audio signal amplifying unit and is also provided with the photoelectrical coupler with linearity curve.
Further technical scheme is that described signal is cut control unit unit, top and comprised the first voltage stabilizing didoe ZD1, the second voltage stabilizing didoe ZD2, the first rectifier diode D1, the second rectifier diode D2, the 3rd rectifier diode D3, the 4th rectifier diode D4, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 5th capacitor C 5, photoelectrical coupler GK1; The negative pole of described the first voltage stabilizing didoe ZD1 connects the output of positive voltage VCC, and the positive pole of the first voltage stabilizing didoe ZD1 is connected with the negative pole of the first rectifier diode D1; The positive pole of described the second voltage stabilizing didoe ZD2 connects the output of negative voltage VEE; The negative pole of the second voltage stabilizing didoe ZD2 is connected with the positive pole of the 4th rectifier diode D4; The positive pole of described the first rectifier diode D1 connects respectively the positive pole of the second rectifier diode D2, one end, one end of the 5th capacitor C 5 and the negative pole of the interior light-emitting diode of photoelectrical coupler GK1 of the 6th resistance R 6; The negative pole of described the 4th rectifier diode D4 connects respectively the negative pole of the 3rd rectifier diode D3, the other end, the other end of the 5th capacitor C 5 and one end of the 7th resistance R 7 of the 6th resistance R 6; The other end of described the 7th resistance R 7 is connected with the positive pole of light-emitting diode in photoelectrical coupler GK1; The negative pole of described the second rectifier diode D2 is connected with the positive pole of the 3rd rectifier diode D3.
Further technical scheme is that described signal sampling unit comprises: sampling amplifier U1-B, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R the 10, the 11 resistance R 11, the 4th capacitor C 4; The negative input end of described sampling amplifier U1-B and the 11 resistance R 11, the tenth resistance R 10 are in parallel; The tenth resistance R 10 ground connection; Described sampling amplifier U1-B positive input terminal and the 8th resistance R 8, the 9th resistance R 9 are in parallel; The 9th resistance R 9 ground connection; The negative pole with the 4th capacitor C 4 of the 8th resistance R 8 is connected, and described the 8th resistance R 8 connects load; Described sampling amplifier U1-B output and the second rectifier diode D2 negative pole, the 3rd rectifier diode D3 are anodal in parallel; Sampling amplifier U1-B output is connected with the 11 resistance R 11.
Further technical scheme is that described signal amplification unit comprises: signal amplifier U1-A, the first resistance R 1 second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, optocoupler electrical equipment GK1; The positive input terminal of described signal amplifier U1-A and the second resistance R 2, the first resistance R 1, the second capacitor C 2 are in parallel; The second resistance R 2, the second capacitor C 2 are connected to the ground and connect respectively; Described the first resistance R 1 is connected with the negative pole of the first capacitor C 1; The positive pole of the first capacitor C 1 is connected with the output of audio signal input unit; Described signal amplifier U1-A negative input end and the 3rd resistance R 3, the 4th resistance R 4, the 3rd capacitor C 3 are in parallel, and are connected with resistance output one end of photoelectrical coupler simultaneously; The 3rd resistance R 3 ground connection; The output of described signal amplifier U1-A and the 4th resistance R 4, the 3rd capacitor C 3 are in parallel, and are connected with the resistance output other end of photoelectrical coupler, and the output of described signal amplifier U1-A is connected with the positive pole of the 4th capacitor C 4.
Compared with prior art; one of the beneficial effects of the utility model are: the utility model can be in detection signal size the mains ripple situation of detecting amplifier; once what can effectively avoid music greatly dynamically time, supply power voltage decline occurred cuts top distorted signal; not only can improve the also acoustical quality of system for electrical teaching of whole audio frequency; and improved also reliability and the durability of system for electrical teaching of whole audio frequency, thereby the further perfect safeguard measure of audio signal amplifier.The utility model is simple in structure, and cost is low, and reliability is high, practical.Can overcome due to the unsettled voltage drop of supply power voltage itself, or cause supply power voltage to decline because external terminate load is overweight and the situation of top distortion appears cutting in audio signal after amplifying, reached improve whole audio frequency also system for electrical teaching acoustical quality, promote the also reliability of system for electrical teaching and the object of durability of whole audio frequency.
Accompanying drawing explanation
Fig. 1 is example structure block diagram of the utility model.
Fig. 2 is embodiment circuit theory diagrams of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further elaborated.
As shown in Figure 1, Fig. 1 shows the structured flowchart of an embodiment of the utility model.The present embodiment has the audio signal of power supply correlation and cuts top control circuit device, comprise audio signal amplifying unit 2, terminal unit 3 and signal sampling unit 4, as preferred embodiment, the present embodiment also comprises that signal cuts top control unit 1, the input of the output disconnecting unit 3 of audio signal amplifying unit 2, the output of terminal unit 3 connects the input of signal sampling unit 4, the output connection signal of signal sampling unit 4 is cut the input of top control unit 1, signal is cut the input of the output connection audio signal amplifying unit 2 of top control unit 1, another input of audio signal amplifying unit connects the output of audio signal input unit 5, audio reception input signal.
According to another preferred embodiment of the present utility model, as shown in Figure 2, audio input signal output after audio signal amplifying unit amplifies drives terminate load unit, and this output signal is sent into the positive input terminal 5 of the sampling amplifier U1-B of signal sampling unit after signal sampling the 8th resistance R 8, the 9th resistance R 9 dividing potential drops simultaneously; Sampling amplifier U1-B carries out sampled signal to output to signal peak clipping control unit after certain proportion amplification, signal is cut top control unit audio signal and sampling point supply power voltage is compared, once the amplitude of audio signal will form certain current potential difference at the 6th resistance R 6 two ends higher than the amplitude of sampling supply power voltage, this current potential difference causes photoelectrical coupler GK1 work; Because the signal amplifier U1-A in photo resistance output and the audio signal amplifying unit of photoelectrical coupler GK1 feeds back the 4th resistance R 4 and connects, therefore photoelectrical coupler GK1 work will reduce the output gain of signal amplifier U1-A, all the time audio output signal is controlled to undistorted state and goes to drive terminal speaker unit.
According to another fact Example of the present utility model, in audio signal amplifying unit: prime audio input signal is connected with the positive terminal that input coupling capacitance C1 is the first capacitor C 1, and the negative pole end of input coupling capacitance C1 is connected with first resistance R 1 one end; The other end of the first resistance R 1 is connected with second resistance R 2 one end, then the one end that is the second capacitor C 2 with input filter capacitor C2 is connected, and is connected with the positive input terminal 3 of signal amplifying part sub-signal amplifier U1-A; The other end of the second resistance R 2 is connected to the ground and connects; The other end of the second capacitor C 2 is connected to the ground and connects; The negative input end 2 of signal amplifier U1-A is connected with one end of the 3rd resistance R 3, then is connected with one end of the 4th resistance R 4, and is connected with one end of the 3rd capacitor C 3, and is connected with resistance output one end of photoelectrical coupler simultaneously; The other end of the 3rd resistance R 3 is connected to the ground and connects; The output 1 of signal amplifier U1-A is connected with the other end of the 4th resistance R 4, then is connected with the other end of the 3rd capacitor C 3, and is connected with the resistance output other end of photoelectrical coupler, and is connected with the positive pole of the 4th capacitor C 4 simultaneously.
According to an embodiment who is more preferably of the present utility model, in signal sampling unit: one end that audio output signal sampling resistor R8 is the 8th resistance R 8 is connected with the negative pole of the 4th capacitor C 4, then is connected with one end of load RL; The other end of the 8th resistance R 8 is connected with the input anode 5 of sampling amplifier U1-B, then is connected with one end of the 9th resistance R 9; The other end of the 9th resistance R 9 is connected to the ground and connects; The negative input end 6 of sampling amplifier U1-B is connected with one end of the 11 resistance R 11, then is connected with one end of the tenth resistance R 10; The other end of the tenth resistance R 10 is connected to the ground and connects; The other end of the 11 resistance R 11 is connected with the output 7 of sampling amplifier U1-B.
According to the embodiment that another is more preferably of the present utility model, signal is cut in the control unit of top: the negative pole of the first voltage stabilizing didoe ZD1 is connected with the output of positive voltage VCC, and the positive pole of the first voltage stabilizing didoe ZD1 is connected with the negative pole of the first rectifier diode D1; The positive pole of the second voltage stabilizing didoe ZD2 is connected with the output of negative voltage VEE, and the negative pole of the second voltage stabilizing didoe ZD2 is connected with the positive pole of the 4th rectifier diode D4; The positive pole of the first rectifier diode D1 connects respectively the positive pole of the second rectifier diode D2, one end, one end of the 5th capacitor C 5 and the negative pole of the interior light-emitting diode of photoelectrical coupler of the 6th resistance R 6; The negative pole of the 4th rectifier diode D4 connects respectively the negative pole of the 3rd rectifier diode D3, the other end, the other end of the 5th capacitor C 5 and one end of the 7th resistance R 7 of the 6th resistance R 6; The other end of the 7th resistance R 7 is connected with the positive pole of light-emitting diode in photoelectrical coupler; The negative pole of the second rectifier diode D2 is connected with the positive pole of the 3rd rectifier diode D3, then is connected with the output 7 of sampling amplifier U1-B, and is connected with one end of the 11 resistance R 11.
" embodiment ", " another embodiment ", " embodiment " that spoken of in this manual, etc., refer to specific features, structure or the feature described in conjunction with this embodiment and be included at least one embodiment that the application's generality describes.In specification, multiple local appearance statement of the same race is not necessarily to refer to same embodiment.Furthermore, while describing a specific features, structure or feature in conjunction with any embodiment, what advocate is to realize this feature, structure or feature in conjunction with other embodiment also to drop in scope of the present utility model.
Although the utility model is described with reference to the multiple explanatory embodiment of utility model here, but, should be appreciated that, those skilled in the art can design a lot of other modification and execution modes, and these are revised and within execution mode will drop on the disclosed principle scope and spirit of the application.More particularly, in the scope of, accompanying drawing open in the application and claim, can carry out multiple modification and improvement to the building block of subject combination layout and/or layout.Except modification that building block and/or layout are carried out with improving, to those skilled in the art, other purposes will be also obvious.
Claims (6)
1. the audio signal with power supply correlation is cut a top control circuit device, comprises audio signal amplifying unit, signal sampling unit and terminal unit, it is characterized in that: also comprise that signal cuts top control unit; The output of described audio signal amplifying unit is connected with the input of described terminal unit, the output of described terminal unit is connected with the input of described signal sampling unit, and the input that the output of described signal sampling unit is cut top control unit with described signal is connected; The output that described signal is cut top control unit connects an input of described audio signal amplifying unit, and another input of described audio signal amplifying unit connects audio input signal.
2. the audio signal according to claim 1 with power supply correlation is cut top control circuit device, it is characterized in that: described terminal unit is: the ohmic load of audio frequency amplifier or the loudspeaker of audio frequency amplifier.
3. the audio signal according to claim 1 with power supply correlation is cut top control circuit device, it is characterized in that: described signal is cut between top control unit and audio signal amplifying unit and is also provided with the photoelectrical coupler with linearity curve.
4. the audio signal according to claim 1 with power supply correlation is cut top control circuit device, it is characterized in that: described signal is cut control unit unit, top and comprised the first voltage stabilizing didoe (ZD1), the second voltage stabilizing didoe (ZD2), the first rectifier diode (D1), the second rectifier diode (D2), the 3rd rectifier diode (D3), the 4th rectifier diode (D4), the 6th resistance (R6), the 7th resistance (R7), the 8th resistance (R8), the 5th electric capacity (C5), photoelectrical coupler (GK1); The negative pole of described the first voltage stabilizing didoe (ZD1) connects the output of positive voltage VCC, and the positive pole of the first voltage stabilizing didoe (ZD1) is connected with the negative pole of the first rectifier diode (D1); The positive pole of described the second voltage stabilizing didoe (ZD2) connects the output of negative voltage VEE; The negative pole of the second voltage stabilizing didoe (ZD2) is connected with the positive pole of the 4th rectifier diode (D4); The positive pole of described the first rectifier diode (D1) connects respectively the positive pole of the second rectifier diode (D2), one end, one end of the 5th electric capacity (C5) and the negative pole of the interior light-emitting diode of photoelectrical coupler (GK1) of the 6th resistance (R6); The negative pole of described the 4th rectifier diode (D4) connects respectively the negative pole of the 3rd rectifier diode (D3), the other end, the other end of the 5th electric capacity (C5) and one end of the 7th resistance (R7) of the 6th resistance (R6); The other end of described the 7th resistance (R7) is connected with the positive pole of the interior light-emitting diode of photoelectrical coupler (GK1); The negative pole of described the second rectifier diode (D2) is connected with the positive pole of the 3rd rectifier diode (D3).
5. the audio signal according to claim 4 with power supply correlation is cut top control circuit device, it is characterized in that: described signal sampling unit comprises: sampling amplifier (U1-B), the 8th resistance (R8), the 9th resistance (R9), the tenth resistance (R10), the 11 resistance (R11), the 4th electric capacity (C4); The negative input end of described sampling amplifier (U1-B) and the 11 resistance (R11), the tenth resistance (R10) are in parallel; The tenth resistance (R10) ground connection; Described sampling amplifier (U1-B) positive input terminal and the 8th resistance (R8), the 9th resistance (R9) are in parallel; The 9th resistance (R9) ground connection; The negative pole with the 4th electric capacity (C4) of the 8th resistance (R8) is connected, and described the 8th resistance (R8) connects load; Described sampling amplifier (U1-B) output and the second rectifier diode (D2) negative pole, the 3rd rectifier diode (D3) are anodal in parallel; Sampling amplifier (U1-B) output is connected with the 11 resistance (R11).
6. the audio signal according to claim 5 with power supply correlation is cut top control circuit device, it is characterized in that: described signal amplification unit comprises: signal amplifier (U1-A), the first resistance (R1) the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), optocoupler electrical equipment (GK1); The positive input terminal of described signal amplifier (U1-A) is with the second resistance (R2), the first resistance (R1), (C2) is in parallel for the second electric capacity; The second resistance (R2), the second electric capacity (C2) are connected to the ground and connect respectively; Described the first resistance (R1) is connected with the negative pole of the first electric capacity (C1); The positive pole of the first electric capacity (C1) is connected with the output of audio signal input unit; Described signal amplifier (U1-A) negative input end and the 3rd resistance (R3), the 4th resistance (R4), the 3rd electric capacity (C3) are in parallel, and are connected with resistance output one end of photoelectrical coupler simultaneously; The 3rd resistance (R3) ground connection; The output of described signal amplifier (U1-A) and the 4th resistance (R4), the 3rd electric capacity (C3) are in parallel, and be connected with the resistance output other end of photoelectrical coupler, the output of described signal amplifier (U1-A) is connected with the positive pole of the 4th electric capacity (C4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320699284.9U CN203618113U (en) | 2013-11-06 | 2013-11-06 | Audio signal clipping control circuit device with power supply correlation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320699284.9U CN203618113U (en) | 2013-11-06 | 2013-11-06 | Audio signal clipping control circuit device with power supply correlation |
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| CN203618113U true CN203618113U (en) | 2014-05-28 |
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| CN201320699284.9U Expired - Lifetime CN203618113U (en) | 2013-11-06 | 2013-11-06 | Audio signal clipping control circuit device with power supply correlation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109979475A (en) * | 2017-12-26 | 2019-07-05 | 深圳Tcl新技术有限公司 | Solve method, system and the storage medium of echo cancellor failure |
| CN116761115A (en) * | 2023-08-11 | 2023-09-15 | 上海海栎创科技股份有限公司 | Low-cost high-efficiency playback power supply control circuit and control method |
-
2013
- 2013-11-06 CN CN201320699284.9U patent/CN203618113U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109979475A (en) * | 2017-12-26 | 2019-07-05 | 深圳Tcl新技术有限公司 | Solve method, system and the storage medium of echo cancellor failure |
| US11276416B2 (en) | 2017-12-26 | 2022-03-15 | Shenzhen Tcl New Technology Co., Ltd. | Method, system and storage medium for solving echo cancellation failure |
| CN116761115A (en) * | 2023-08-11 | 2023-09-15 | 上海海栎创科技股份有限公司 | Low-cost high-efficiency playback power supply control circuit and control method |
| CN116761115B (en) * | 2023-08-11 | 2023-12-12 | 上海海栎创科技股份有限公司 | Low-cost high-efficiency playback power supply control circuit and control method |
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Address after: 621000 Mianyang city of Sichuan province Youxian Economic Experimental Zone in the road No. 36 Patentee after: SICHUAN HUSHAN ELECTRICAL APPLIANCE CO.,LTD. Address before: 621000 Mianyang city of Sichuan province Youxian Economic Experimental Zone in the road No. 36 Patentee before: SICHUAN HUSHAN ELECTRIC APPLIANCE Co.,Ltd. |
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Granted publication date: 20140528 |
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