CN204206430U - A kind of audio amplifier switching on and shutting down anti-impact circuit - Google Patents
A kind of audio amplifier switching on and shutting down anti-impact circuit Download PDFInfo
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- CN204206430U CN204206430U CN201420530974.6U CN201420530974U CN204206430U CN 204206430 U CN204206430 U CN 204206430U CN 201420530974 U CN201420530974 U CN 201420530974U CN 204206430 U CN204206430 U CN 204206430U
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- triode
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- control switch
- master control
- audio amplifier
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Abstract
The utility model discloses a kind of audio amplifier switching on and shutting down anti-impact circuit, it comprises the power input be electrically connected in turn, charging resistor, voltage stabilizing didoe, master control switch triode and the supply power voltage end of powering to audio amplifier, this circuit also includes charging capacitor and discharge diode, one end of charging capacitor connects the negative pole of voltage stabilizing didoe, the other end ground connection of charging capacitor, discharge diode is connected in the two ends of charging resistor in parallel, the positive pole of discharge diode connects the negative pole of voltage stabilizing didoe, the negative pole of discharge diode is earth terminal, the collector electrode of master control switch triode also controls triode by shutdown and is electrically connected with power-off operation end, the base stage that shutdown controls triode is connected with the collector electrode of master control switch triode, shutdown controls the grounded emitter of triode, the collector electrode that shutdown controls triode is connected with power-off operation end.The utility model structure is simple, effectively prevents the signal of telecommunication impact phenomenon that start and close exists.
Description
Technical field
The utility model relates to voicefrequency circuit technical field, is a kind of audio amplifier switching on and shutting down anti-impact circuit specifically.
Background technology
At present, common speaker products, often finding opens or shut down is the sound occurring " bang bang ", trace it to its cause and be: in audio amplifier start or shutdown be, the signal of telecommunication produces transient change and forms impact to circuit, for this reason, makes audio amplifier occur noise when start or shutdown.
Afterwards, people designed a kind of circuit, though to slow down, the signal of telecommunication, to the impact of circuit, reduces noise when reducing switching on and shutting down, but the circuit structure of this structure is complicated, and manufacturing cost is better, and still unrealized large-scale socialization is promoted so far.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and provide a kind of audio amplifier switching on and shutting down anti-impact circuit, it has the simple advantage of structure, effectively prevents the signal of telecommunication impact phenomenon that start and close exists.
Goal of the invention of the present utility model is achieved in that a kind of audio amplifier switching on and shutting down anti-impact circuit, it is characterized in that: it comprises the power input be electrically connected in turn, charging resistor, voltage stabilizing didoe, master control switch triode and the supply power voltage end of powering to audio amplifier, described charging resistor founds the negative pole connecting voltage stabilizing didoe, the positive pole of voltage stabilizing didoe connects the base stage of master control switch triode, the grounded emitter of master control switch triode, the collector electrode of master control switch triode connects supply power voltage end, described anti-impact circuit also includes charging capacitor and discharge diode, one end of described charging capacitor connects the negative pole of voltage stabilizing didoe, the other end ground connection of charging capacitor, described discharge diode is connected in the two ends of charging resistor in parallel, the positive pole of discharge diode connects the negative pole of voltage stabilizing didoe, the negative pole of discharge diode is earth terminal, the collector electrode of master control switch triode also controls triode by shutdown and is electrically connected with power-off operation end, the base stage that shutdown controls triode is connected with the collector electrode of master control switch triode, shutdown controls the grounded emitter of triode, the collector electrode that shutdown controls triode is connected with power-off operation end.
The negative pole of described discharge diode is ground connection by discharge resistance.
The collector electrode that described shutdown controls triode is connected with power-off operation end by a shutdown current-limiting resistance.
The collector electrode of described master control switch triode is connected with supply power voltage end by power supply current-limiting resistance.
It is 8050 triodes that described master control switch triode and shutdown control triode.
Be serially connected with power-supply rectifying diode between described power input and charging resistor, the positive pole of power-supply rectifying diode is connected with power input, and the negative pole of power-supply rectifying diode is connected with charging resistor.
Described power-supply rectifying diode is IN4007 diode.
The utility model, compared with prior art, has the following advantages:
The utility model audio amplifier switching on and shutting down anti-impact circuit, it is mainly provided with charging resistor, voltage stabilizing didoe, charging capacitor and discharge diode, during charging, charged to charging capacitor by charging resistor, when the threshold voltage of charging voltage higher than voltage stabilizing didoe, the conducting of master control switch triode, realizes being powered to audio amplifier by supply power voltage end, and then realize start time delay, avoid electric current directly to impact circuit; And when shutting down, circuit is discharged by discharge resistance, the electric current that it also avoid equally shuts down is is to the impact of circuit.For this reason, the utility model achieves the signal of telecommunication impact phenomenon effectively preventing start and close from existing with simple technical pattern.
Accompanying drawing explanation
Accompanying drawing 1 is the circuit structure diagram of the utility model most preferred embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model will be further described.
According to Fig. 1, audio amplifier switching on and shutting down anti-impact circuit described in the present embodiment, it comprises the power input 1 be electrically connected in turn, charging resistor 2, voltage stabilizing didoe 3, master control switch triode 4 and the supply power voltage end 5 of powering to audio amplifier, the vertical negative pole connecting voltage stabilizing didoe 3 of described charging resistor 2, the positive pole of voltage stabilizing didoe 3 connects the base stage of master control switch triode 4, the grounded emitter of master control switch triode 4, the collector electrode of master control switch triode 4 connects supply power voltage end 5, described anti-impact circuit also includes charging capacitor 6 and discharge diode 7, one end of described charging capacitor 6 connects the negative pole of voltage stabilizing didoe 3, the other end ground connection of charging capacitor 6, described discharge diode 7 is connected in the two ends of charging resistor 2 in parallel, the positive pole of discharge diode 7 connects the negative pole of voltage stabilizing didoe 3, the negative pole of discharge diode 7 is earth terminal, the collector electrode of master control switch triode 4 also controls triode 8 by shutdown and is electrically connected with power-off operation end 9, the base stage that shutdown controls triode 8 is connected with the collector electrode of master control switch triode 4, shutdown controls the grounded emitter of triode 8, the collector electrode that shutdown controls triode 8 is connected with power-off operation end 9.
Period, the negative pole of described discharge diode 7 is ground connection by discharge resistance 10, the collector electrode that shutdown controls triode 8 is connected with power-off operation end 9 by a shutdown current-limiting resistance 11, and the collector electrode of master control switch triode 4 is connected with supply power voltage end 5 by power supply current-limiting resistance 12.
In the preparation process of circuit, it is 8050 triodes that described master control switch triode 4 and shutdown control triode 8, power-supply rectifying diode 13 is serially connected with between power input 1 and charging resistor 2, the positive pole of power-supply rectifying diode 13 is connected with power input 1, the negative pole of power-supply rectifying diode 13 is connected with charging resistor 2, and power-supply rectifying diode 13 is IN4007 diode.
Principle of the present utility model is:
1, start time delay: opening power, charges, when voltage is flushed to the threshold voltage higher than voltage stabilizing didoe 3 to charging capacitor 6 by charging resistor 2, master control switch triode 4 conducting, realize being powered to audio amplifier by supply power voltage end 5, and then realize start time delay, avoid electric current directly to impact circuit;
2, shut down fast: after power cutoff, power input 1 is zero, charging resistor 2 starts electric discharge by discharge diode 7, discharge resistance 10, when discharge threshold voltage lower than voltage stabilizing triode time, master control switch triode 4 is in cut-off state, and now, supply power voltage end 5 is also in higher voltage status, shutdown controls triode 8 conducting immediately, can complete power-off operation by power-off operation end 9.
Period, the time of discharge and recharge can adjust relevant parameter according to the actual needs.
To sum up learn, the utility model audio amplifier switching on and shutting down anti-impact circuit, it is mainly provided with charging resistor 2, voltage stabilizing didoe 3, charging capacitor 6 and discharge diode 7, during charging, realize being powered to audio amplifier by supply power voltage end 5, and then realize start time delay, avoid electric current directly to impact circuit; And when shutting down, circuit is discharged by discharge resistance 10, the electric current that it also avoid equally shuts down is is to the impact of circuit.
Claims (7)
1. an audio amplifier switching on and shutting down anti-impact circuit, it is characterized in that: it comprises the power input (1) be electrically connected in turn, charging resistor (2), voltage stabilizing didoe (3), master control switch triode (4) and the supply power voltage end (5) of powering to audio amplifier, the vertical negative pole connecting voltage stabilizing didoe (3) of described charging resistor (2), the positive pole of voltage stabilizing didoe (3) connects the base stage of master control switch triode (4), the grounded emitter of master control switch triode (4), the collector electrode of master control switch triode (4) connects supply power voltage end (5), described anti-impact circuit also includes charging capacitor (6) and discharge diode (7), one end of described charging capacitor (6) connects the negative pole of voltage stabilizing didoe (3), the other end ground connection of charging capacitor (6), described discharge diode (7) is connected in the two ends of charging resistor (2) in parallel, the positive pole of discharge diode (7) connects the negative pole of voltage stabilizing didoe (3), the negative pole of discharge diode (7) is earth terminal, the collector electrode of master control switch triode (4) also controls triode (8) by shutdown and is electrically connected with power-off operation end (9), the base stage that shutdown controls triode (8) is connected with the collector electrode of master control switch triode (4), shutdown controls the grounded emitter of triode (8), the collector electrode that shutdown controls triode (8) is connected with power-off operation end (9).
2. audio amplifier switching on and shutting down anti-impact circuit according to claim 1, is characterized in that: the negative pole of described discharge diode (7) is ground connection by discharge resistance (10).
3. audio amplifier switching on and shutting down anti-impact circuit according to claim 1, is characterized in that: the collector electrode that described shutdown controls triode (8) is connected with power-off operation end (9) by shutdown current-limiting resistance (11).
4. audio amplifier switching on and shutting down anti-impact circuit according to claim 1, is characterized in that: the collector electrode of described master control switch triode (4) is connected with supply power voltage end (5) by power supply current-limiting resistance (12).
5. audio amplifier switching on and shutting down anti-impact circuit according to claim 1, is characterized in that: it is 8050 triodes that described master control switch triode (4) and shutdown control triode (8).
6. audio amplifier switching on and shutting down anti-impact circuit according to claim 1, it is characterized in that: between described power input (1) and charging resistor (2), be serially connected with power-supply rectifying diode (13), the positive pole of power-supply rectifying diode (13) is connected with power input (1), and the negative pole of power-supply rectifying diode (13) is connected with charging resistor (2).
7. audio amplifier switching on and shutting down anti-impact circuit according to claim 6, is characterized in that: described power-supply rectifying diode (13) is IN4007 diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420530974.6U CN204206430U (en) | 2014-09-16 | 2014-09-16 | A kind of audio amplifier switching on and shutting down anti-impact circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420530974.6U CN204206430U (en) | 2014-09-16 | 2014-09-16 | A kind of audio amplifier switching on and shutting down anti-impact circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204206430U true CN204206430U (en) | 2015-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420530974.6U Active CN204206430U (en) | 2014-09-16 | 2014-09-16 | A kind of audio amplifier switching on and shutting down anti-impact circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204206430U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109587602A (en) * | 2017-09-29 | 2019-04-05 | 深圳市三诺数字科技有限公司 | A kind of audio signal boost control circuit |
| CN109587602B (en) * | 2017-09-29 | 2024-05-17 | 深圳市三诺数字科技有限公司 | Audio signal boost control circuit |
-
2014
- 2014-09-16 CN CN201420530974.6U patent/CN204206430U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109587602A (en) * | 2017-09-29 | 2019-04-05 | 深圳市三诺数字科技有限公司 | A kind of audio signal boost control circuit |
| CN109587602B (en) * | 2017-09-29 | 2024-05-17 | 深圳市三诺数字科技有限公司 | Audio signal boost control circuit |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |