CN206472295U - For eliminating the powered-down rear output POP acoustic-electrics road of sound equipment power amplifier - Google Patents
For eliminating the powered-down rear output POP acoustic-electrics road of sound equipment power amplifier Download PDFInfo
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- CN206472295U CN206472295U CN201720072522.1U CN201720072522U CN206472295U CN 206472295 U CN206472295 U CN 206472295U CN 201720072522 U CN201720072522 U CN 201720072522U CN 206472295 U CN206472295 U CN 206472295U
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- resistance
- voltage divider
- divider network
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- control triode
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Abstract
One kind is used to eliminate the powered-down rear output POP acoustic-electrics road of sound equipment power amplifier, electric capacity C91 is connected between positive power source terminal and ground, diode D10 and the first resistor voltage divider network are connected in series between positive power source terminal and ground, electric capacity C237 is connected in parallel with the partial ohmic in the first resistor voltage divider network, electric capacity C237 one end is grounded, second resistor voltage divider network is connected between positive power source terminal and ground, triode Q9 base stage is connected with positive power source terminal, triode Q9 colelctor electrode is connected with triode Q4 base stage, triode Q9 emitter stage is connected on the intermediate node of the first resistor voltage divider network, triode Q4 grounded emitter, triode Q4 colelctor electrode is connected on the intermediate node of the second resistor voltage divider network, the intermediate node of second resistor voltage divider network is control output node, diode D10 positive pole is connected with triode Q9 base stage, diode D10 negative pole is connected with triode Q9 emitter stage.
Description
Technical field
The utility model discloses a kind of sound control circuit, particularly a kind of to be used to eliminate the powered-down rear output of sound equipment power amplifier
POP acoustic-electrics road, belongs to sound technique field.
Background technology
With continuing to develop for multimedia technology and electronics technology, multi-media sound system no longer footpath between fields already in people live
It is raw, using more and more extensive.And with the continuous improvement of people's living standards, people are to each electronic product for being applied in life
Requirement also more and more higher, in the prior art inside sound equipment, due to there is substantial amounts of capacitive device, in sound equipment powered-down moment, by
In instantaneous voltage change, pulse voltage can be produced, when pulse voltage is transmitted to loudspeaker, loudspeaker can be made to send explosion sound,
Also referred to as POP sound, i.e., can send a sound of " puff ", and this is obvious noise, influences the use of people, if eliminating shutdown moment
POP sound, as urgent problem to be solved in the industry.
The content of the invention
There is POP sound for sound equipment of the prior art shutdown moment mentioned above, the utility model is provided
One kind is used to eliminate the powered-down rear output POP acoustic-electrics road of sound equipment power amplifier, and shutdown wink can be achieved by special circuit structure design in it
Between, output control signal makes its Jing Yin to power discharging IC.
The utility model solve its technical problem use technical scheme be：One kind is powered-down rear defeated for eliminating sound equipment power amplifier
Go out POP acoustic-electrics road, the circuit includes the first control triode Q9, the second control triode Q4, the first resistor voltage divider network, second
Resistor voltage divider network, the first storage capacitor C91, the second storage capacitor C237 and buck diode D10, the first storage capacitor C91
It is connected between positive power source terminal PVCC and ground, buck diode D10 and the first resistor voltage divider network are connected in series in positive power source terminal
Between PVCC and ground, the second storage capacitor C237 is connected in parallel with the partial ohmic in the first resistor voltage divider network, with the second storage
Other electricity in partial ohmic resistance and the first resistor voltage divider network in the first resistor voltage divider network that can be in parallel electric capacity C237
The resistance value ratio of resistance is 1:1~1:3, second storage capacitor C237 one end ground connection, the second resistor voltage divider network is connected to positive power source terminal
Between PVCC and ground, the first control triode Q9 base stage is connected with positive power source terminal PVCC, the first control triode Q9 current collection
Pole is connected with the second control triode Q4 base stage, and the first control triode Q9 emitter stage is connected to the first resistor voltage divider network
Intermediate node on, the second control triode Q4 grounded emitter, the second control triode Q4 colelctor electrode is connected to second
On the intermediate node of resistor voltage divider network, the intermediate node of the second resistor voltage divider network is control output node SDZ, is depressured two poles
Pipe D10 positive pole is connected with the first control triode Q9 base stage, buck diode D10 negative pole and the first control triode Q9
Emitter stage connection.
The technical scheme that the utility model solves the use of its technical problem further comprises：
Filtration module is connected between the colelctor electrode and ground of the first described control triode Q9.
Described filtration module includes the electric capacity C239 and resistance R320 being connected in parallel.
The first described resistor voltage divider network includes the resistance R319 and resistance R322 being connected in series, resistance R319 resistance
For 30K Ω, resistance R322 resistance is 100K Ω, and electric capacity C237 is connected in parallel with resistance R322.
The second described resistor voltage divider network includes the resistance R60 and resistance R323 being connected in series, resistance R60 and resistance
R323 resistance is respectively 47K Ω.
The beneficial effects of the utility model are：Shutdown wink can be achieved by special circuit structure design in the utility model
Between, output control signal makes its Jing Yin to power discharging IC, can eliminate the POP sound of shutdown moment, lifts sound equipment using effect.
The utility model is described further below in conjunction with the drawings and specific embodiments.
Brief description of the drawings
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
The present embodiment is the utility model preferred embodiment, and other all its principle and basic structure are identical with the present embodiment
Or approximate, within the utility model protection domain.
Accompanying drawing 1 is refer to, the utility model mainly includes the first control triode Q9, the second control triode Q4, first
Resistor voltage divider network, the second resistor voltage divider network, the first storage capacitor C91, the second storage capacitor C237 and buck diode
D10, the first storage capacitor C91 is connected between positive power source terminal PVCC and ground, and positive power source terminal PVCC is audio amplifier positive supply, decompression two
Pole pipe D10 and the first resistor voltage divider network are connected in series between positive power source terminal PVCC and ground, the second storage capacitor C237 and
Partial ohmic in one resistor voltage divider network is connected in parallel, in the first resistor voltage divider network in parallel with the second storage capacitor C237
Partial ohmic resistance and other resistance in the first resistor voltage divider network resistance value ratio be 1:1~1:3, the second storage capacitor
C237 one end is grounded, and the second resistor voltage divider network is connected between positive power source terminal PVCC and ground, the first control triode Q9 base
Pole is connected with positive power source terminal PVCC, and the first control triode Q9 colelctor electrode is connected with the second control triode Q4 base stage, the
One control triode Q9 emitter stage is connected to the intermediate node of the first resistor voltage divider network（I.e. resistor voltage divider network is divided into conduct
It is intermediate node between two parts as partial pressure, two parts）On, the second control triode Q4 grounded emitter, second
Control triode Q4 colelctor electrode is connected on the intermediate node of the second resistor voltage divider network, the centre of the second resistor voltage divider network
Node is control output node SDZ, and control output node SDZ is used to be connected with power discharging IC Opportunity awaiting control for linear mouthful, for controlling power amplifier
IC is worked, and buck diode D10 positive pole is connected with the first control triode Q9 base stage, buck diode D10 negative pole and
First control triode Q9 emitter stage connection.
In the present embodiment, filtration module, filtration module are connected between the first control triode Q9 colelctor electrode and ground
Available for the base stage for filtering out the second control triode Q4（I.e. first control triode Q9 colelctor electrode）Spike, can be effective
Prevent the second control triode Q4 maloperation.In the present embodiment, filtration module includes the electric capacity C239 and resistance being connected in parallel
R320。
In the present embodiment, the first resistor voltage divider network includes the resistance R319 and resistance R322 being connected in series, resistance R319
Resistance be 30K Ω, resistance R322 resistance is 100K Ω, and electric capacity C237 is connected in parallel with resistance R322.
In the present embodiment, the second resistor voltage divider network includes the resistance R60 and resistance R323 that are connected in series, resistance R60 and
Resistance R323 resistance is respectively 47K Ω.
The utility model is in normal work, due to being connected with two between the first control triode Q9 colelctor electrode and base stage
Pole pipe D10, because diode D10 has tube voltage drop so that the voltage of the first control triode Q9 colelctor electrode is less than base stage electricity
Pressure, the first control triode Q9 cut-offs, so that the second control triode Q4 base potential is dragged down by resistance R320, second
Control triode Q4 is also switched off, due to resistance R60 and resistance R323 partial pressure so that output node SDZ exports high level, control
Power discharging IC normal work；When powered-down, positive power source terminal PVCC does not have power input, the electric energy that the first storage capacitor C91 is stored
By resistance R60 and resistance the R323 electric discharge being connected in series, when the first control triode Q9 base potential is less than emitter stage electricity
During position, the first control triode Q9 conductings, emitter stage and current collection that the second storage capacitor C237 passes through the first control triode Q9
The second control triode Q4 base potential is drawn high in pole, the second control triode Q4 conductings, so as to by resistance R323 short circuits, make
Output node SDZ output low levels are obtained, control power discharging IC enters holding state, then without audio output, so as to eliminate during shutdown
POP sound.
The utility model by special circuit structure design, can be achieved shutdown moment, output control signal to power discharging IC,
Make its Jing Yin, the POP sound of shutdown moment can be eliminated, lift sound equipment using effect.
Claims (5)
1. one kind is used to eliminate the powered-down rear output POP acoustic-electrics road of sound equipment power amplifier, it is characterized in that：Described circuit includes the first control
Triode Q9, the second control triode Q4, the first resistor voltage divider network, the second resistor voltage divider network, the first storage capacitor C91,
Second storage capacitor C237 and buck diode D10, the first storage capacitor C91 are connected between positive power source terminal PVCC and ground, are dropped
Pressure diode D10 and the first resistor voltage divider network are connected in series between positive power source terminal PVCC and ground, the second storage capacitor C237
It is connected in parallel with the partial ohmic in the first resistor voltage divider network, first voltage-splitter resistance net in parallel with the second storage capacitor C237
The resistance value ratio of partial ohmic resistance in network and other resistance in the first resistor voltage divider network is 1:1~1:3, the second energy storage electricity
Hold C237 one end ground connection, the second resistor voltage divider network is connected between positive power source terminal PVCC and ground, the first control triode Q9's
Base stage is connected with positive power source terminal PVCC, and the first control triode Q9 colelctor electrode is connected with the second control triode Q4 base stage,
First control triode Q9 emitter stage is connected on the intermediate node of the first resistor voltage divider network, the second control triode Q4's
Grounded emitter, the second control triode Q4 colelctor electrode is connected on the intermediate node of the second resistor voltage divider network, second point
The intermediate node of piezoresistance network is control output node SDZ, and buck diode D10 positive pole and first control triode Q9's
Base stage is connected, and buck diode D10 negative pole is connected with the first control triode Q9 emitter stage.
2. according to claim 1 be used to eliminate the powered-down rear output POP acoustic-electrics road of sound equipment power amplifier, it is characterized in that：Described
Filtration module is connected between first control triode Q9 colelctor electrode and ground.
3. according to claim 2 be used to eliminate the powered-down rear output POP acoustic-electrics road of sound equipment power amplifier, it is characterized in that：Described
Filtration module includes the electric capacity C239 and resistance R320 being connected in parallel.
4. being used for according to claim 1 or 2 or 3 eliminates the powered-down rear output POP acoustic-electrics road of sound equipment power amplifier, it is characterized in that：
The first described resistor voltage divider network includes the resistance R319 and resistance R322 being connected in series, and resistance R319 resistance is 30K Ω,
Resistance R322 resistance is 100K Ω, and electric capacity C237 is connected in parallel with resistance R322.
5. being used for according to claim 1 or 2 or 3 eliminates the powered-down rear output POP acoustic-electrics road of sound equipment power amplifier, it is characterized in that：
The second described resistor voltage divider network includes the resistance R60 and resistance R323 being connected in series, resistance R60 and resistance R323 resistance
Respectively 47K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720072522.1U CN206472295U (en) | 2017-01-20 | 2017-01-20 | For eliminating the powered-down rear output POP acoustic-electrics road of sound equipment power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720072522.1U CN206472295U (en) | 2017-01-20 | 2017-01-20 | For eliminating the powered-down rear output POP acoustic-electrics road of sound equipment power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206472295U true CN206472295U (en) | 2017-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720072522.1U Expired - Fee Related CN206472295U (en) | 2017-01-20 | 2017-01-20 | For eliminating the powered-down rear output POP acoustic-electrics road of sound equipment power amplifier |
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| CN (1) | CN206472295U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110290446A (en) * | 2019-06-11 | 2019-09-27 | 晶晨半导体(上海)股份有限公司 | A kind of high-speed switch machine prevents the mute circuit of sonic boom |
-
2017
- 2017-01-20 CN CN201720072522.1U patent/CN206472295U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110290446A (en) * | 2019-06-11 | 2019-09-27 | 晶晨半导体(上海)股份有限公司 | A kind of high-speed switch machine prevents the mute circuit of sonic boom |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170905 Termination date: 20190120 |