CN106210984A - A kind of audio signal processing based on signal level regulation circuit - Google Patents
A kind of audio signal processing based on signal level regulation circuit Download PDFInfo
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- CN106210984A CN106210984A CN201610550762.8A CN201610550762A CN106210984A CN 106210984 A CN106210984 A CN 106210984A CN 201610550762 A CN201610550762 A CN 201610550762A CN 106210984 A CN106210984 A CN 106210984A
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- H—ELECTRICITY
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- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
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Abstract
The invention discloses a kind of audio signal processing based on signal level regulation circuit, it is characterized in that, mainly by processing chip U, audion VT2, audion VT3, diode D4, polar capacitor C5, second-order filter circuit, power amplification circuit, the signal level regulation circuit being serially connected between the OUT pin and the power amplification circuit that process chip U, and the signal output processing circuit composition being serially connected between the colelctor electrode of power amplification circuit and audion VT2.Interference signal in sampled audio signal can be eliminated or suppress by the present invention, interference signal in sampled audio signal can be eliminated or suppress by the present invention, and the present invention can also make sampled audio signal frequency far above input audio signal highest frequency, this sampled audio signal frequency at least can reach 2.5 times of input audio signal highest frequency, thus improves the present invention accuracy to Audio Signal Processing.
Description
Technical field
The present invention relates to electronic applications, specifically, be a kind of Audio Signal Processing based on signal level regulation circuit
System.
Background technology
Audio reception device has been daily life, learn, work in indispensable instrument, and audio reception device
Working stability be otherwise depending on audio frequency processing system.The audio frequency of input cannot be believed by existing audio frequency processing system accurately
Number process, thus cause the situation that there will be noise, distortion during audio reception device output signal, have a strong impact on user's
Audibility.
Therefore it provides a kind of audio frequency processing system that can accurately process audio signal is the task of top priority.
Summary of the invention
It is an object of the invention to overcome audio frequency processing system of the prior art accurately audio signal to be carried out
Process defect, it is provided that a kind of based on signal level regulation circuit audio signal processing.
The present invention is achieved through the following technical solutions: a kind of Audio Signal Processing system based on signal level regulation circuit
System, mainly by processing chip U, audion VT2, audion VT3, N pole is connected with the emitter stage of audion VT2, P pole is through resistance
With the diode D4 that is connected of CC pin processing chip U after R10, negative pole base stage with audion VT3 after resistance R12 is connected
Connect, positive pole after resistance R11 with the polar capacitor C5 that is connected of CF pin processing chip U, with the IN pin phase processing chip U
The second-order filter circuit connected, the power amplification circuit being connected with the colelctor electrode of audion VT3, it is serially connected in and processes chip U's
Signal level regulation circuit between OUT pin and power amplification circuit, and it is serially connected in power amplification circuit and audion VT2
Colelctor electrode between signal output processing circuit composition；The base stage of described audion VT2 and the COM pin phase processing chip U
Connect；The emitter stage of described audion VT3 is connected with the CM pin processing chip U；The VS pin of described process chip U and electricity
Source is connected.
Described signal level regulation circuit is by audion VT5, audion VT6, audion VT7, and positive pole is with audion VT5's
The polar capacitor C12 that colelctor electrode is connected, negative pole is connected with the OUT pin of process chip U, positive pole is sent out with audion VT5's
After polar capacitor C13, N electrode resistance R30 that emitter-base bandgap grading is connected, negative pole positive pole with polar capacitor C12 after resistance R24 is connected
Be connected with the colelctor electrode of audion VT6, diode D10 that P pole emitter stage with audion VT5 after resistance R25 is connected,
Negative pole base stage with audion VT5 after resistance R26 is connected, positive pole colelctor electrode with audion VT7 after resistance R28 is connected
The polar capacitor C14 connect, positive pole base stage with audion VT7 after adjustable resistance R29 is connected, negative pole is with audion VT6's
Be connected with the positive pole of polar capacitor C15 after polar capacitor C15, N electrode resistance R27 that base stage is connected, P pole and polar capacitor
Diode D9, the P pole that the positive pole of C12 is connected emitter stage with audion VT7 after resistance R32 is connected, the two of N pole ground connection
Pole pipe D12, and P pole is connected with the emitter stage of audion VT6, N pole with diode D12 after resistance R31, N pole is connected
Diode D11 composition；The negative pole of described polar capacitor C14 be connected with the base stage of audion VT5 after ground connection；Described diode
The N pole of D11 is also connected with the N pole of diode D10；The minus earth of described polar capacitor C13；The N pole of described diode D12
Regulate the outfan of circuit as signal level and be connected with power amplification circuit.
Described second-order filter circuit by amplifier P1, audion VT1, positive pole after resistance R23 with the positive pole of amplifier P1
Be connected, negative pole is connected with the negative pole of polar capacitor C1 as polar capacitor C1, the N pole of the input of second-order filter circuit, P
The diode D2 that pole positive pole with amplifier P1 after resistance R4 is connected, positive pole is connected with the positive pole of polar capacitor C1, negative
Polar capacitor C2, the N pole that pole is connected with the P pole of diode D2 outfan with amplifier P1 after resistance R2 is connected, P pole
The diode D1 that positive pole with amplifier P1 is connected after resistance R1, one end is connected with the N pole of diode D1, the other end with
The inductance L1 that the outfan of amplifier P1 is connected, negative pole negative pole with amplifier P1 after resistance R6 is connected, positive pole is through electricity
After resistance R5, polar capacitor C3, the N pole that is connected with the outfan of amplifier P1 is connected with the negative pole of amplifier P1, P pole is through electricity
The diode D3 being connected with the base stage of audion VT1 after resistance R7, one end is connected with the N pole of diode D3, other end ground connection
Resistance R8, positive pole is connected with the emitter stage of audion VT1, the polar capacitor C4 of minus earth, and one end and polarity electricity
Hold the resistance R9 that positive pole is connected, the other end the is connected composition of C4 with the negative pole of polar capacitor C4；Described amplifier P1 is just
Pole ground connection；The colelctor electrode of described audion VT1 is connected with the positive pole of polar capacitor C3 and the IN pin of process chip U respectively.
Further, described signal output processing circuit is by the positive pole of amplifier P2, amplifier P3, positive pole and amplifier P2
Be connected, polar capacitor C7, N pole that negative pole is connected with the colelctor electrode of audion VT2 defeated with amplifier P2 after resistance R14
Going out the diode D5 that end is connected, P pole positive pole with amplifier P2 after resistance R13 is connected, one end is defeated with amplifier P2's
Go out end be connected, resistance R15 that the other end is connected with the positive pole of amplifier P3, positive pole is connected with the negative pole of amplifier P2,
Polar capacitor C8, the N pole that negative pole outfan with amplifier P2 after resistance R16 is connected is connected with the negative pole of amplifier P3
Connect, the diode D6 of P pole ground connection, and positive pole is connected with the outfan of amplifier P3, negative pole after adjustable resistance R17 with two
The polar capacitor C9 composition that the N pole of pole pipe D6 is connected；The negative pole of described polar capacitor C9 is as signal output processing circuit
Outfan is also connected with power amplification circuit.
Described power amplification circuit is by amplifier P4, and audion VT4, P pole is connected with the positive pole of amplifier P4, N pole warp
The diode D7 that after resistance R18, negative pole with polar capacitor C9 is connected, positive pole is connected with the N pole of diode D12, negative pole warp
Polar capacitor C6, the N pole that after resistance R19, positive pole with amplifier P4 is connected is connected with the colelctor electrode of audion VT3, P pole
The diode D8 that base stage with audion VT4 is connected after resistance R23, one end is connected with the N pole of diode D8, the other end
The adjustable resistance R22 being connected with the negative pole of amplifier P4, positive pole is connected with the emitter stage of audion VT4, negative pole sequentially warp
The polar capacitor C11 being connected with the outfan of amplifier P4 after inductance L2 and resistance R21, and positive pole after resistance R20 with
The outfan of amplifier P4 is connected, negative pole forms as the polar capacitor C10 of the outfan of power amplification circuit；Described three poles
The emitter stage of pipe VT4 is connected with the negative pole of amplifier P4, its grounded collector.
For the practical effect of the present invention, described process chip U the most preferentially uses the integrated chip of AD736 to realize.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the interference signal in sampled audio signal can be eliminated or suppress by the present invention, and the present invention can be to sampling sound
Frequently the interference signal in signal eliminates or suppresses, and the present invention can also make sampled audio signal frequency far above input sound
Frequently signal highest frequency, this sampled audio signal frequency at least can reach 2.5 times of input audio signal highest frequency, thus carry
The high present invention accuracy to Audio Signal Processing, thus appearance when the present invention can effectively prevent audio reception device from playing
Noise, the situation of distortion, it is ensured that the audibility of user.
(2) dutycycle of the square-wave signal of audio signal frequency can be adjusted by the present invention, makes the signal of telecommunication of output
Level keeps stable, thus improves the present invention accuracy to Audio Signal Processing.
(3) present invention can make the frequency range of audio signal be maintained at 10HZ-25HZ, ensure that the present invention to sound
The accuracy of audio signalprocessing, effectively raises the audio quality of audio reception device output.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the signal level regulation circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by processing chip U, audion VT2, audion VT3, resistance R10, resistance R11,
Resistance R12, polar capacitor C5, diode D4, signal level regulation circuit, second-order filter circuit, power amplification circuit, Yi Jixin
Number output processing circuit composition.
During connection, the N pole of diode D4 is connected with the emitter stage of audion VT2, its P pole then after resistance R10 with place
The CC pin of reason chip U is connected.The negative pole of polar capacitor C5 base stage with audion VT3 after resistance R12 is connected, its just
Pole is then connected with the CF pin processing chip U after resistance R11.Second-order filter circuit is connected with the IN pin processing chip U
Connect.Power amplification circuit is connected with the colelctor electrode of audion VT3.Signal level regulation circuit is serially connected in the OUT processing chip U
Between pin and power amplification circuit.Signal output processing circuit is serially connected in the colelctor electrode of power amplification circuit and audion VT2
Between.
The base stage of described audion VT2 is connected with the COM pin processing chip U；The emitter stage of described audion VT3 with
The CM pin processing chip U is connected；The VS pin of described process chip U is connected with power supply.Actual for the present invention makes
By effect, described process chip U the most preferentially uses the integrated chip of AD736 to realize.
Further, described second-order filter circuit is by amplifier P1, audion VT1, resistance R1, resistance R2, resistance R3, electricity
Resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, polar capacitor C1, polar capacitor C2, polar capacitor C3, polarity
Electric capacity C4, inductance L1, diode D1, diode D2, and diode D3 form.
During connection, the positive pole of polar capacitor C1 positive pole with amplifier P1 after resistance R23 is connected, the then conduct of its negative pole
The input of second-order filter circuit is also connected with audio signal sample device.The N pole of diode D2 and the negative pole of polar capacitor C1
Be connected, its P pole then after resistance R4 positive pole with amplifier P1 be connected.The positive pole of polar capacitor C2 is with polar capacitor C1's
Positive pole is connected, its negative pole is then connected with the P pole of diode D2.
Wherein, the N pole of diode D1 outfan with amplifier P1 after resistance R2 is connected, its P pole is then through resistance R1
Positive pole with amplifier P1 is connected afterwards.One end of inductance L1 is connected with the N pole of diode D1, its other end then with amplifier
The outfan of P1 is connected.The negative pole of polar capacitor C3 negative pole with amplifier P1 after resistance R6 is connected, its positive pole then warp
After resistance R5, the outfan with amplifier P1 is connected.The N pole of diode D3 is connected with the negative pole of amplifier P1, its P pole then
After resistance R7, the base stage with audion VT1 is connected.
Meanwhile, one end of resistance R8 be connected with the N pole of diode D3, its other end then ground connection.Polar capacitor C4 is just
Pole is connected with the emitter stage of audion VT1, its negative pole then ground connection.One end of resistance R9 is connected with the positive pole of polar capacitor C4
Connect, its other end then negative pole with polar capacitor C4 is connected.The plus earth of described amplifier P1；Described audion VT1's
Colelctor electrode is connected with the positive pole of polar capacitor C3 and the IN pin of process chip U respectively.
Further, described signal output processing circuit is by amplifier P2, amplifier P3, resistance R13, resistance R14, electricity
Resistance R15, resistance R16, adjustable resistance R17, polar capacitor C7, polar capacitor C8, polar capacitor C9, diode D5, and two poles
Pipe D6 forms.
During connection, the positive pole of polar capacitor C7 is connected with the positive pole of amplifier P2, its negative pole then with the collection of audion VT2
Electrode is connected.The N pole of diode D5 outfan with amplifier P2 after resistance R14 is connected, its P pole is then through resistance R13
Positive pole with amplifier P2 is connected afterwards.One end of resistance R15 is connected with the outfan of amplifier P2, its other end then with put
The positive pole of big device P3 is connected.
Wherein, the positive pole of polar capacitor C8 be connected with the negative pole of amplifier P2, its negative pole then after resistance R16 with amplification
The outfan of device P2 is connected.The N pole of diode D6 is connected with the negative pole of amplifier P3, its P pole then ground connection.Polar capacitor C9
Positive pole be connected with the outfan of amplifier P3, its negative pole then after adjustable resistance R17 N pole with diode D6 be connected.
The negative pole of described polar capacitor C9 as the outfan of signal output processing circuit and is connected with power amplification circuit.
Yet further, described power amplification circuit is by amplifier P4, audion VT4, resistance R18, resistance R19, resistance
R20, resistance R21, adjustable resistance R22, resistance R23, polar capacitor C6, polar capacitor C10, polar capacitor C11, diode D7,
Diode D8, and inductance L2 composition.
During connection, the P pole of diode D7 is connected with the positive pole of amplifier P4, its N pole is then electric with polarity after resistance R18
The negative pole holding C9 is connected.The positive pole of polar capacitor C6 is connected with the N pole of diode D12, its negative pole then after resistance R19 with
The positive pole of amplifier P4 is connected.The N pole of diode D8 is connected with the colelctor electrode of audion VT3, its P pole is then through resistance R23
Base stage with audion VT4 is connected afterwards.
Meanwhile, one end of adjustable resistance R22 be connected with the N pole of diode D8, its other end then negative with amplifier P4
Pole is connected.The positive pole of polar capacitor C11 is connected with the emitter stage of audion VT4, its negative pole is the most sequentially through inductance L2 and electricity
It is connected with the outfan of amplifier P4 after resistance R21.The positive pole of polar capacitor C10 after resistance R20 with the output of amplifier P4
End is connected, its negative pole is then as the outfan of power amplification circuit.The emitter stage of described audion VT4 is negative with amplifier P4's
Pole is connected, its grounded collector.
As in figure 2 it is shown, described signal level regulation circuit is by audion VT5, audion VT6, audion VT7, resistance
R24, resistance R25, resistance R26, resistance R27, resistance R28, adjustable resistance R29, resistance R30, resistance R31, resistance R32, polarity
Electric capacity C12, polar capacitor C13, polar capacitor C14, polar capacitor C15, diode D9, diode D10, diode D11, and
Diode D12 forms.
During connection, the positive pole of polar capacitor C12 is connected with the colelctor electrode of audion VT5, its negative pole then with process chip U
OUT pin be connected.The positive pole of polar capacitor C13 is connected with the emitter stage of audion VT5, its negative pole is then through resistance R24
Positive pole with polar capacitor C12 is connected afterwards.After N electrode resistance R30 of diode D10 the colelctor electrode with audion VT6 be connected,
Its P pole then after resistance R25 emitter stage with audion VT5 be connected.The negative pole of polar capacitor C14 after resistance R26 with three
The base stage of pole pipe VT5 is connected, its positive pole then after resistance R28 colelctor electrode with audion VT7 be connected.
Meanwhile, the positive pole of polar capacitor C15 base stage with audion VT7 after adjustable resistance R29 be connected, its negative pole then
It is connected with the base stage of audion VT6.After N electrode resistance R27 of diode D9 the positive pole with polar capacitor C15 be connected, its P pole
Then the positive pole with polar capacitor C12 is connected.The P pole of diode D12 emitter stage with audion VT7 after resistance R32 is connected
Connect, its N pole then ground connection.The P pole of diode D11 is connected with the emitter stage of audion VT6, its N pole then after resistance R31 with two
The N pole of pole pipe D12 is connected.
The negative pole of described polar capacitor C14 be connected with the base stage of audion VT5 after ground connection；The N pole of described diode D11
Also it is connected with the N pole of diode D10；The minus earth of described polar capacitor C13；The N pole of described diode D12 is as signal
The outfan of level adjustment circuit is also connected with power amplification circuit.
During operation, the interference signal in sampled audio signal can be eliminated or suppress by the present invention, and the present invention can be to adopting
Interference signal in sample audio signal eliminates or suppresses, and the present invention can also make sampled audio signal frequency far above defeated
Entering audio signal highest frequency, this sampled audio signal frequency at least can reach 2.5 times of input audio signal highest frequency, from
And improve the present invention accuracy to Audio Signal Processing, thus when the present invention can effectively prevent audio reception device from playing
Noise, the situation of distortion there is, it is ensured that the audibility of user.
Meanwhile, the dutycycle of the square-wave signal of audio signal frequency can be adjusted by the present invention, makes the telecommunications of output
Number level keeps stable, thus improves the present invention accuracy to Audio Signal Processing.The present invention can make the frequency of audio signal
Rate scope is maintained at 10HZ-25HZ, ensures that the accuracy to Audio Signal Processing of the present invention, effectively raises sound
Frequency receives the audio quality of equipment output.
According to above-described embodiment, can well realize the present invention.
Claims (6)
1. an audio signal processing based on signal level regulation circuit, it is characterised in that mainly by processing chip U,
Audion VT2, audion VT3, N pole is connected with the emitter stage of audion VT2, P pole after resistance R10 with process chip U
The diode D4 that CC pin is connected, negative pole base stage with audion VT3 after resistance R12 is connected, positive pole is after resistance R11
The polar capacitor C5 being connected with the CF pin processing chip U, the second-order filter electricity being connected with the IN pin processing chip U
Road, the power amplification circuit being connected with the colelctor electrode of audion VT3, it is serially connected in OUT pin and the power amplification processing chip U
Signal level regulation circuit between circuit, and it is serially connected in the letter between the colelctor electrode of power amplification circuit and audion VT2
Number output processing circuit composition；The base stage of described audion VT2 is connected with the COM pin processing chip U；Described audion
The emitter stage of VT3 is connected with the CM pin processing chip U；The VS pin of described process chip U is connected with power supply.
A kind of audio signal processing based on signal level regulation circuit the most according to claim 1, its feature exists
In, described signal level regulation circuit is by the current collection of audion VT5, audion VT6, audion VT7, positive pole and audion VT5
The emitter stage of the polar capacitor C12 that pole is connected, negative pole is connected with the OUT pin of process chip U, positive pole and audion VT5
Be connected, after polar capacitor C13, N electrode resistance R30 that negative pole positive pole with polar capacitor C12 after resistance R24 is connected with three
The diode D10 that the colelctor electrode of pole pipe VT6 is connected, P pole emitter stage with audion VT5 after resistance R25 is connected, negative pole
After resistance R26, the base stage with audion VT5 is connected, positive pole colelctor electrode with audion VT7 after resistance R28 is connected
Polar capacitor C14, positive pole base stage with audion VT7 after adjustable resistance R29 is connected, the base stage of negative pole and audion VT6
Be connected with the positive pole of polar capacitor C15 after polar capacitor C15, N electrode resistance R27 being connected, P pole and polar capacitor C12
Diode D9, the P pole that positive pole is connected emitter stage with audion VT7 after resistance R32 is connected, the diode of N pole ground connection
D12, and P pole is connected with the emitter stage of audion VT6, N pole is connected with the N pole of diode D12 after resistance R31 two
Pole pipe D11 forms；The negative pole of described polar capacitor C14 be connected with the base stage of audion VT5 after ground connection；Described diode D11
N pole be also connected with the N pole of diode D10；The minus earth of described polar capacitor C13；The N pole of described diode D12 is made
Regulate the outfan of circuit for signal level and be connected with power amplification circuit.
A kind of audio signal processing based on signal level regulation circuit the most according to claim 2, its feature exists
In, described second-order filter circuit by amplifier P1, audion VT1, positive pole positive pole with amplifier P1 after resistance R23 is connected
Connect, negative pole is connected with the negative pole of polar capacitor C1 as polar capacitor C1, the N pole of the input of second-order filter circuit, P pole warp
The diode D2 that after resistance R4, positive pole with amplifier P1 is connected, positive pole is connected with the positive pole of polar capacitor C1, negative pole with
Polar capacitor C2, the N pole that the P pole of diode D2 is connected outfan with amplifier P1 after resistance R2 is connected, P pole is through electricity
The diode D1 that is connected with the positive pole of amplifier P1 after resistance R1, one end is connected with the N pole of diode D1, the other end and amplification
The inductance L1 that the outfan of device P1 is connected, negative pole negative pole with amplifier P1 after resistance R6 is connected, positive pole is through resistance R5
Polar capacitor C3, the N pole that outfan with amplifier P1 is connected afterwards is connected with the negative pole of amplifier P1, P pole is through resistance R7
The diode D3 that base stage with audion VT1 is connected afterwards, one end is connected with the N pole of diode D3, the electricity of other end ground connection
Resistance R8, positive pole is connected with the emitter stage of audion VT1, the polar capacitor C4 of minus earth, and one end and polar capacitor C4
The resistance R9 that positive pole is connected, the other end is connected with the negative pole of polar capacitor C4 composition；The positive pole of described amplifier P1 connects
Ground；The colelctor electrode of described audion VT1 is connected with the positive pole of polar capacitor C3 and the IN pin of process chip U respectively.
A kind of audio signal processing based on signal level regulation circuit the most according to claim 3, its feature exists
In, described signal output processing circuit by amplifier P2, amplifier P3, positive pole is connected with the positive pole of amplifier P2, negative pole with
Polar capacitor C7, the N pole that the colelctor electrode of audion VT2 is connected outfan with amplifier P2 after resistance R14 is connected, P
The diode D5 that pole positive pole with amplifier P2 after resistance R13 is connected, one end is connected with the outfan of amplifier P2, separately
The resistance R15 that one end is connected with the positive pole of amplifier P3, positive pole is connected with the negative pole of amplifier P2, negative pole is through resistance R16
Polar capacitor C8, the N pole that outfan with amplifier P2 is connected afterwards is connected with the negative pole of amplifier P3, the two of P pole ground connection
Pole pipe D6, and positive pole is connected with the outfan of amplifier P3, negative pole after adjustable resistance R17 with the N pole phase of diode D6
The polar capacitor C9 composition connected；The negative pole of described polar capacitor C9 as signal output processing circuit outfan and and power
Amplifying circuit is connected.
A kind of audio signal processing based on signal level regulation circuit the most according to claim 4, its feature exists
In, described power amplification circuit by amplifier P4, audion VT4, P pole is connected with the positive pole of amplifier P4, N pole is through resistance
The diode D7 that after R18, negative pole with polar capacitor C9 is connected, positive pole is connected with the N pole of diode D12, negative pole is through resistance
Polar capacitor C6, the N pole that after R19, positive pole with amplifier P4 is connected is connected with the colelctor electrode of audion VT3, P pole is through electricity
The diode D8 that is connected with the base stage of audion VT4 after resistance R23, one end is connected with the N pole of diode D8, the other end with put
The adjustable resistance R22 that the negative pole of big device P4 is connected, positive pole is connected with the emitter stage of audion VT4, negative pole is sequentially through inductance
The polar capacitor C11 being connected with the outfan of amplifier P4 after L2 and resistance R21, and positive pole after resistance R20 with amplification
The outfan of device P4 is connected, negative pole forms as the polar capacitor C10 of the outfan of power amplification circuit；Described audion
The emitter stage of VT4 is connected with the negative pole of amplifier P4, its grounded collector.
A kind of audio signal processing based on signal level regulation circuit the most according to claim 5, its feature exists
In, described process chip U is the integrated chip of AD736.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610550762.8A CN106210984A (en) | 2016-07-13 | 2016-07-13 | A kind of audio signal processing based on signal level regulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610550762.8A CN106210984A (en) | 2016-07-13 | 2016-07-13 | A kind of audio signal processing based on signal level regulation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106210984A true CN106210984A (en) | 2016-12-07 |
Family
ID=57477229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610550762.8A Pending CN106210984A (en) | 2016-07-13 | 2016-07-13 | A kind of audio signal processing based on signal level regulation circuit |
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| Country | Link |
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2016
- 2016-07-13 CN CN201610550762.8A patent/CN106210984A/en active Pending
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Application publication date: 20161207 |