CN206225002U - Sound transducer circuit - Google Patents
Sound transducer circuit Download PDFInfo
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- CN206225002U CN206225002U CN201621197249.7U CN201621197249U CN206225002U CN 206225002 U CN206225002 U CN 206225002U CN 201621197249 U CN201621197249 U CN 201621197249U CN 206225002 U CN206225002 U CN 206225002U
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- resistance
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Abstract
The utility model is related to sound transducer circuit.It includes acoustic-electric conversion circuit, and the output end of acoustic-electric conversion circuit is connected with amplifying circuit, filter circuit and shaping circuit in turn；Wherein shaping circuit includes resistance R6, resistance R9, electric capacity C6 and operational amplifier U2, resistance R6 and electric capacity C6 are connected in parallel, and one end of resistance R6 is connected with the input of shaping circuit, the other end ground connection of resistance R6, one termination power of resistance R9, the other end of resistance R9 is connected with the input of shaping circuit, the inverting input of operational amplifier U2 is connected with the input of shaping circuit, the normal phase input end of operational amplifier U2 is connected with reference voltage, and the output end of operational amplifier U2 is connected with the input of shaping circuit.The sound transducer circuit that the utility model is made up of design acoustic-electric conversion circuit, amplifying circuit, filter circuit and shaping circuit so that the circuit anti-interference is strong, and control accuracy is high.
Description
Technical field
The utility model is related to sound control technique field, more particularly to a kind of sound transducer circuit.
Background technology
During model car races, typically using remote wireless controlled, however as continuing to develop for electronic technology,
Especially sound control technique is continued to develop, and existing a small amount of car mould employs sound control technique at present, by sound control car mould
Match, because the acoustic environment competed is more severe, is filled with noise in environment, therefore traditional sound control technique is not met by
Demand.
The content of the invention
The utility model is to solve technical problem in the prior art, there is provided a kind of sound transducer circuit, the sound sensor
Device circuit can be anti-interference, and control accuracy is high.
The technical solution adopted in the utility model is：
Sound transducer circuit, including acoustic-electric conversion circuit, the output end of acoustic-electric conversion circuit are connected with amplification electricity in turn
Road, filter circuit and shaping circuit；Wherein shaping circuit includes resistance R6, resistance R9, electric capacity C6 and operational amplifier U2,
Resistance R6 and electric capacity C6 are connected in parallel, and one end of resistance R6 is connected with the input of shaping circuit, another termination of resistance R6
Ground a, termination power of resistance R9, the other end of resistance R9 is connected with the input of shaping circuit, and operational amplifier U2's is anti-phase
Input is connected with the input of shaping circuit, and the normal phase input end of operational amplifier U2 is connected with reference voltage, operation amplifier
The output end of device U2 is connected with the input of shaping circuit.
Further, acoustic-electric conversion circuit includes the resistance R2 and resistance R3 that are connected in series, and resistance R2's freely terminates electricity
Source, the free ending grounding of resistance R3, the connection end of resistance R2 and resistance R3 is grounded by MIC, and high potential end and the acoustic-electric of MIC turn
Change the output end connection of circuit.
Further, amplifying circuit includes operational amplifier U1, and the normal phase input end of operational amplifier U1 is connected with reference
Voltage, the inverting input of operational amplifier U1 is connected by electric capacity C3 with the input of amplifying circuit, and inverting input is logical
Resistance R5 is crossed to be connected with the output end of operational amplifier U1, and resistance R5 is parallel with electric capacity C4.
Further, amplifying circuit also includes the resistance R1 and resistance R4 that are connected in series, the free end of resistance R1 and power supply
Connection, the free ending grounding of resistance R4, resistance R1 is connected with the connection end of resistance R4 with the normal phase input end of operational amplifier U1,
And described reference voltage is provided.
Preferably, resistance R4 is parallel with electric capacity C1.
Further, filtering circuit includes the electric capacity C5 and resistance R8 of series connection.
What the utility model was obtained has the beneficial effect that：The utility model by design by acoustic-electric conversion circuit, amplifying circuit,
The sound transducer circuit that filter circuit and shaping circuit are constituted so that the circuit anti-interference is strong, and control accuracy is high.
Brief description of the drawings
Fig. 1 is schematic diagram of the present utility model.
Specific embodiment
Embodiment：Referring to Fig. 1, sound transducer circuit, including acoustic-electric conversion circuit, the output end of acoustic-electric conversion circuit according to
It is secondary to be connected with amplifying circuit, filter circuit and shaping circuit；Wherein shaping circuit include resistance R6, resistance R9, electric capacity C6 with
And operational amplifier U2, resistance R6 and electric capacity C6 are connected in parallel, and one end of resistance R6 is connected with the input of shaping circuit, electricity
The other end ground connection of R6 is hindered, a termination power of resistance R9, the other end of resistance R9 is connected with the input of shaping circuit, computing
The inverting input of amplifier U2 is connected with the input of shaping circuit, and the normal phase input end of operational amplifier U2 is connected with benchmark
Voltage, the output end of operational amplifier U2 is connected with the input of shaping circuit.
In the technical program, by Design enlargement circuit, filter circuit and shaping circuit so that the electricity changed by sound
After stream signal, by amplifying, going background noise, remove noise, anti-interference is good；Car mould control accuracy is high.Wherein amplifying circuit, filter
Wave circuit can use prior art.Acoustic-electric conversion circuit typically uses mi circuits, or prior art.
Further, acoustic-electric conversion circuit includes the resistance R2 and resistance R3 that are connected in series, and resistance R2's freely terminates electricity
Source, the free ending grounding of resistance R3, the connection end of resistance R2 and resistance R3 is grounded by MIC, and high potential end and the acoustic-electric of MIC turn
Change the output end connection of circuit.
The acoustic-electric conversion circuit causes the electric capacity or resistance variations of MIC by sound so that the level at the high potential end of MIC
Change, so as to form the level signal corresponding with sound.
Further, amplifying circuit includes operational amplifier U1, and the normal phase input end of operational amplifier U1 is connected with reference
Voltage, the inverting input of operational amplifier U1 is connected by electric capacity C3 with the input of amplifying circuit, and inverting input is logical
Resistance R5 is crossed to be connected with the output end of operational amplifier U1, and resistance R5 is parallel with electric capacity C4.
Amplifying circuit is amplified to level signal, and uses negative-feedback, improves and amplifies stability.
Further, amplifying circuit also includes the resistance R1 and resistance R4 that are connected in series, the free end of resistance R1 and power supply
Connection, the free ending grounding of resistance R4, resistance R1 is connected with the connection end of resistance R4 with the normal phase input end of operational amplifier U1,
And described reference voltage is provided.
Preferably, resistance R4 is parallel with electric capacity C1.
Electric capacity C1 is used as shunt capacitance, the voltage of stabilization normal phase input end.
Further, filtering circuit includes the electric capacity C5 and resistance R8 of series connection.
The above, be only it is of the present utility model it is preferable implement, not make any formal to the utility model
Limitation, any those skilled in the art are changed or are modified to equivalent variations possibly also with above-mentioned technology contents
Equivalent embodiments, here, it is all without departing from the technical solution of the utility model content, just according to technical spirit pair of the present utility model
Any simple modification, equivalent variations and modification that above example is made, still fall within the scope of technical solutions of the utility model
It is interior.
Claims (6)
1. sound transducer circuit, it is characterised in that：Including acoustic-electric conversion circuit, the output end of acoustic-electric conversion circuit is sequentially connected
There are amplifying circuit, filter circuit and shaping circuit；Wherein shaping circuit includes resistance R6, resistance R9, electric capacity C6 and computing
Amplifier U2, resistance R6 and electric capacity C6 are connected in parallel, and one end of resistance R6 is connected with the input of shaping circuit, resistance R6's
The other end is grounded, and a termination power of resistance R9, the other end of resistance R9 is connected with the input of shaping circuit, operational amplifier
The inverting input of U2 is connected with the input of shaping circuit, and the normal phase input end of operational amplifier U2 is connected with reference voltage,
The output end of operational amplifier U2 is connected with the input of shaping circuit.
2. sound transducer circuit according to claim 1, it is characterised in that：Acoustic-electric conversion circuit includes what is be connected in series
The free termination power of resistance R2 and resistance R3, resistance R2, the free ending grounding of resistance R3, the connection end of resistance R2 and resistance R3
It is grounded by MIC, the high potential end of MIC is connected with the output end of acoustic-electric conversion circuit.
3. sound transducer circuit according to claim 2, it is characterised in that：Amplifying circuit includes operational amplifier U1,
The normal phase input end of operational amplifier U1 is connected with reference voltage, and the inverting input of operational amplifier U1 passes through electric capacity C3 and puts
The input of big circuit is connected, and inverting input is connected by resistance R5 with the output end of operational amplifier U1, and resistance R5
It is parallel with electric capacity C4.
4. sound transducer circuit according to claim 3, it is characterised in that：Amplifying circuit also includes the electricity being connected in series
Resistance R1 and resistance R4, the free end of resistance R1 is connected with power supply, the free ending grounding of resistance R4, the connection of resistance R1 and resistance R4
End is connected with the normal phase input end of operational amplifier U1, and provides described reference voltage.
5. sound transducer circuit according to claim 4, it is characterised in that：Resistance R4 is parallel with electric capacity C1.
6. sound transducer circuit according to claim 5, it is characterised in that：Filtering circuit include series connection electric capacity C5 and
Resistance R8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621197249.7U CN206225002U (en) | 2016-11-07 | 2016-11-07 | Sound transducer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621197249.7U CN206225002U (en) | 2016-11-07 | 2016-11-07 | Sound transducer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206225002U true CN206225002U (en) | 2017-06-06 |
Family
ID=58791924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621197249.7U Active CN206225002U (en) | 2016-11-07 | 2016-11-07 | Sound transducer circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206225002U (en) |
-
2016
- 2016-11-07 CN CN201621197249.7U patent/CN206225002U/en active Active
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