CN106210985A - A kind of audio signal processing based on equalization amplifying circuit - Google Patents
A kind of audio signal processing based on equalization amplifying circuit Download PDFInfo
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- CN106210985A CN106210985A CN201610550779.3A CN201610550779A CN106210985A CN 106210985 A CN106210985 A CN 106210985A CN 201610550779 A CN201610550779 A CN 201610550779A CN 106210985 A CN106210985 A CN 106210985A
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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
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
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Abstract
The invention discloses a kind of audio signal processing based on equalization amplifying circuit, it is characterized in that, mainly by processing chip U, audion VT2, audion VT3, diode D4, polar capacitor C5, equalization amplifying circuit, second-order filter circuit, it is serially connected in the power amplification circuit between the colelctor electrode of audion VT3 and the OUT pin processing 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 equalization amplifying circuit.
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 equalization amplifying circuit audio signal processing.
The present invention is achieved through the following technical solutions: a kind of audio signal processing based on equalization amplifying circuit,
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 R10
Afterwards with the diode D4 that is connected of CC pin processing chip U, negative pole base stage with audion VT3 after resistance R12 is connected,
The polar capacitor C5 that positive pole is connected with the CF pin processing chip U after resistance R11, is connected with the IN pin processing chip U
The equalization amplifying circuit connect, the second-order filter circuit being connected with equalization amplifying circuit, be serially connected in the colelctor electrode of audion VT3 with
Process the power amplification circuit between the OUT pin of chip U, and be serially connected in the current collection of power amplification circuit and audion VT2
Signal output processing circuit composition between pole；The base stage of described audion VT2 is connected with the COM pin processing chip U；Institute
The emitter stage stating audion VT3 is connected with the CM pin processing chip U；The VS pin of described process chip U is connected with power supply
Connect.
Described equalization amplifying circuit is by audion VT5, audion VT6, and audion VT7, P pole is sequentially through resistance R29 and electricity
Resistance R30 after be connected with the emitter stage of audion VT6, the diode D10 of N pole ground connection, positive pole after resistance R24 with audion
The polar capacitor C12 that the emitter stage of VT5 is connected, negative pole is connected with the N pole of diode D10 after adjustable resistance R26, positive pole
Be connected with the base stage of audion VT6 after resistance R27, polar capacitor that negative pole is connected with the adjustable end of adjustable resistance R26
C13, the resistance R28 that one end is connected with the positive pole of polar capacitor C13, the other end is connected with the N pole of diode D10, one end
Be connected with the colelctor electrode of audion VT7, adjustable resistance that the other end is connected with the junction point of resistance R29 with resistance R30
Two poles that base stage is connected, N pole is connected with the emitter stage of audion VT6 with audion VT7 after resistance R32, R31, P pole
Pipe D11, positive pole emitter stage with audion VT7 after resistance R34 is connected, the polar capacitor C16 of minus earth, negative pole and three
The polar capacitor C15 that the emitter stage of pole pipe VT7 is connected, positive pole colelctor electrode with audion VT6 after resistance R33 is connected,
The inductance L3 that one end is connected with the positive pole of polar capacitor C15, the other end is connected with the emitter stage of audion VT7, negative pole with
The polar capacitor C14 that the colelctor electrode of audion VT6 is connected, positive pole is connected with the base stage of audion VT5, and P pole and three
The diode D9 composition that the emitter stage of pole pipe VT5 is connected, N pole colelctor electrode with audion VT6 after resistance R25 is connected；
The colelctor electrode of described audion VT5 is connected with the positive pole of polar capacitor C13；The emitter stage of described audion VT7 also with process
The IN pin of chip U is connected；The positive pole of described polar capacitor C12 as equalization amplifying circuit input and and second-order filter
Circuit is connected.
Further, described second-order filter circuit by amplifier P1, audion VT1, positive pole after resistance R23 with amplifier
The positive pole of P1 is connected, the negative pole of negative pole polar capacitor C1, the N pole as the input of second-order filter circuit and polar capacitor C1
Be connected, diode D2 that P pole positive pole with amplifier P1 after resistance R4 is connected, the positive pole phase of positive pole and polar capacitor C1
Connect, polar capacitor C2, the N pole that is connected with the P pole of diode D2 of negative pole after resistance R2 with the outfan phase of amplifier P1
Connect, diode D1 that P pole positive pole with amplifier P1 after resistance R1 is connected, one end is connected with the N pole of diode D1,
The inductance L1 that the other end is connected with the outfan of amplifier P1, negative pole negative pole with amplifier P1 after resistance R6 is connected,
Polar capacitor C3, the N pole that positive pole outfan with amplifier P1 after resistance R5 is connected is connected with the negative pole of amplifier P1,
The diode D3 that P pole base stage with audion VT1 after resistance R7 is connected, one end is connected with the N pole of diode D3, another
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
The resistance R9 composition that the positive pole of polar capacitor C4 is connected, the other end is connected with the negative pole of polar capacitor C4；Described amplifier
The plus earth of P1；The colelctor electrode of described audion VT1 respectively with positive pole and the positive pole phase of polar capacitor C12 of polar capacitor C3
Connect.
Described signal output processing circuit is connected with the positive pole of amplifier P2 by amplifier P2, amplifier P3, positive pole, is born
Polar capacitor C7, the N pole that pole is connected with the colelctor electrode of audion VT2 outfan with amplifier P2 after resistance R14 is connected
Connect, diode D5 that P pole positive pole with amplifier P2 after resistance R13 is connected, one end is connected with the outfan of amplifier P2
Connect, 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, negative pole is through electricity
Polar capacitor C8, the N pole being connected with the outfan of amplifier P2 after resistance R16 is connected with the negative pole of amplifier P3, P pole ground connection
Diode D6, and positive pole is connected with the outfan of amplifier P3, negative pole after adjustable resistance R17 with the N of diode D6
The polar capacitor C9 composition that pole is connected；The negative pole of described polar capacitor C9 as signal output processing circuit outfan and with
Power amplification circuit is connected.
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 with process chip U OUT pin be connected,
Polar capacitor C6, the N pole that negative pole positive pole with amplifier P4 after resistance R19 is connected is connected with the colelctor electrode of audion VT3
Connect, diode D8 that P pole base stage with audion VT4 after resistance R23 is connected, one end is connected with the N pole of diode D8,
The adjustable resistance R22 that the other end is connected with the negative pole of amplifier P4, positive pole is connected with the emitter stage of audion VT4, negative pole
The polar capacitor C11 being sequentially connected through inductance L2 outfan with amplifier P4 after resistance R21, and positive pole is through resistance
After R20, the outfan with amplifier P4 is connected, negative pole forms as the polar capacitor C10 of the outfan of power amplification circuit；
The emitter stage of described audion 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) frequency distortion of audio signal can be eliminated by the present invention, and in energy audio frequency mesh signal, the frequency of shortcoming becomes
Divide and compensate, overweight frequency content is suppressed, thus improves the present invention accuracy to Audio Signal Processing, have
The tonequality that improve audio-frequence player device of effect and acoustics.
(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 equalization amplifying 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, equalization amplifying circuit, second-order filter circuit, power amplification circuit, and signal is defeated
Go out to process 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.Equalization amplifying circuit is connected with the IN pin processing chip U
Connect.Second-order filter circuit is connected with equalization amplifying circuit.Power amplification circuit is serially connected in colelctor electrode and the process of audion VT3
Between the OUT pin of chip U.Signal output processing circuit is serially connected between the colelctor electrode of power amplification circuit and audion VT2.
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 positive pole of polar capacitor C12 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 with process chip U OUT pin be connected, its negative pole is then through resistance
After R19, the positive pole with amplifier P4 is connected.The N pole of diode D8 is connected with the colelctor electrode of audion VT3, its P pole then warp
After resistance R23, the base stage with audion VT4 is connected.
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 equalization amplifying circuit is by audion VT5, audion VT6, audion VT7, resistance R24, electricity
Resistance R25, adjustable resistance R26, resistance R27, resistance R28, resistance R29, resistance R30, adjustable resistance R31, resistance R32, resistance
R33, resistance R34, polar capacitor C12, polar capacitor C13, polar capacitor C14, polar capacitor C15, polar capacitor C16, two poles
Pipe D9, diode D10, diode D11, and inductance L3 form.
During connection, the P pole of diode D10 is sequentially connected through resistance R29 emitter stage with audion VT6 after resistance R30
Connect, its N pole then ground connection.The positive pole of polar capacitor C12 emitter stage with audion VT5 after resistance R24 is connected, its negative pole then
After adjustable resistance R26, the N pole with diode D10 is connected.The positive pole of polar capacitor C13 after resistance R27 with audion VT6
Base stage be connected, its negative pole is then connected with the adjustable end of adjustable resistance R26.
Wherein, one end of resistance R28 be connected with the positive pole of polar capacitor C13, its other end then with the N of diode D10
Pole is connected.One end of adjustable resistance R31 is connected with the colelctor electrode of audion VT7, its other end then with resistance R29 and resistance
The junction point of R30 is connected.The P pole of diode D11 base stage with audion VT7 after resistance R32 is connected, its N pole then with
The emitter stage of audion VT6 is connected.The positive pole of polar capacitor C16 emitter stage with audion VT7 after resistance R34 is connected
Connect, its negative pole then ground connection.
Meanwhile, the negative pole of polar capacitor C15 be connected with the emitter stage of audion VT7, its positive pole after resistance R33 with three
The colelctor electrode of pole pipe VT6 is connected.One end of inductance L3 is connected with the positive pole of polar capacitor C15, its other end then with three poles
The emitter stage of pipe VT7 is connected.The negative pole of polar capacitor C14 is connected with the colelctor electrode of audion VT6, its positive pole then with three poles
The base stage of pipe VT5 is connected.The P pole of diode D9 is connected with the emitter stage of audion VT5, its N pole then after resistance R25 with
The colelctor electrode of audion VT6 is connected.
The colelctor electrode of described audion VT5 is connected with the positive pole of polar capacitor C13；The emitter stage of described audion VT7
Also it is connected with the IN pin processing chip U；The positive pole of described polar capacitor C12 as equalization amplifying circuit input and with
Second-order filter circuit is connected.
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 frequency distortion of audio signal can be eliminated by the present invention, and the frequency of shortcoming in energy audio frequency mesh signal
Composition compensates, and suppresses overweight frequency content, thus improves the present invention accuracy to Audio Signal Processing,
Effectively raise tonequality and the acoustics of audio-frequence player device.The present invention can make the frequency range of audio signal be maintained at
10HZ-25HZ, ensures that the accuracy to Audio Signal Processing of the present invention, effectively raises audio reception device defeated
The audio quality gone out.
According to above-described embodiment, can well realize the present invention.
Claims (6)
1. an audio signal processing based on equalization amplifying circuit, it is characterised in that mainly by processing chip U, three poles
Pipe VT2, audion VT3, N pole is connected with the emitter stage of audion VT2, P pole is managed with the CC processing chip U after resistance R10
The diode D4 that foot is connected, negative pole base stage with audion VT3 after resistance R12 is connected, positive pole after resistance R11 with place
The polar capacitor C5 that the CF pin of reason chip U is connected, the equalization amplifying circuit being connected with the IN pin processing chip U, with
The second-order filter circuit that equalization amplifying circuit is connected, is serially connected in the colelctor electrode of audion VT3 and the OUT pin processing chip U
Between power amplification circuit, and at the signal output being serially connected between the colelctor electrode of power amplification circuit and audion VT2
Reason circuit composition；The base stage of described audion VT2 is connected with the COM pin processing chip U；The transmitting of described audion VT3
Pole 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 equalization amplifying circuit the most according to claim 1, it is characterised in that institute
State equalization amplifying circuit by audion VT5, audion VT6, audion VT7, P pole sequentially after resistance R29 and resistance R30 with three
The emitter stage of pole pipe VT6 is connected, the diode D10 of N pole ground connection, positive pole after resistance R24 with the emitter stage phase of audion VT5
Connect, the polar capacitor C12 that is connected with the N pole of diode D10 after adjustable resistance R26 of negative pole, positive pole after resistance R27 with
The polar capacitor C13 that the base stage of audion VT6 is connected, negative pole is connected with the adjustable end of adjustable resistance R26, one end and polarity
The collection of the resistance R28 that the positive pole of electric capacity C13 is connected, the other end is connected with the N pole of diode D10, one end and audion VT7
Adjustable resistance R31, the P pole that electrode is connected, the other end is connected with the junction point of resistance R29 with resistance R30 is after resistance R32
Be connected with the base stage of audion VT7, diode D11 that N pole is connected with the emitter stage of audion VT6, positive pole is through resistance R34
Afterwards the emitter stage with audion VT7 be connected, the polar capacitor C16 of minus earth, negative pole is connected with the emitter stage of audion VT7
Connect, polar capacitor C15 that positive pole colelctor electrode with audion VT6 after resistance R33 is connected, one end is with polar capacitor C15's
The inductance L3 that positive pole is connected, the other end is connected with the emitter stage of audion VT7, the colelctor electrode phase of negative pole and audion VT6
Connect, the polar capacitor C14 that is connected with the base stage of audion VT5 of positive pole, and P pole is connected with the emitter stage of audion VT5
Connect, diode D9 composition that N pole colelctor electrode with audion VT6 after resistance R25 is connected；The current collection of described audion VT5
Pole is connected with the positive pole of polar capacitor C13；The emitter stage of described audion VT7 is also connected with the IN pin processing chip U；
The positive pole of described polar capacitor C12 as the input of equalization amplifying circuit and is connected with second-order filter circuit.
A kind of audio signal processing based on equalization amplifying circuit the most according to claim 2, it is characterised in that institute
Stating second-order filter circuit by amplifier P1, audion VT1, positive pole positive pole with amplifier P1 after resistance R23 is connected, negative pole
Be 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 is through resistance R4
The diode D2 that positive pole with amplifier P1 is connected afterwards, positive pole is connected with the positive pole of polar capacitor C1, negative pole and diode
Polar capacitor C2, the N pole that the P pole of D2 is connected outfan with amplifier P1 after resistance R2 is connected, P pole is after resistance R1
The diode D1 being connected with the positive pole of amplifier P1, one end is connected with the N pole of diode D1, the other end and amplifier P1
The inductance L1 that outfan is connected, negative pole negative pole with amplifier P1 after resistance R6 is connected, positive pole after resistance R5 with put
Polar capacitor C3, the N pole that the outfan of big device P1 is connected is connected with the negative pole of amplifier P1, P pole after resistance R7 with three
The diode D3 that the base stage of pole pipe VT1 is connected, one end is connected with the N pole of diode D3, the resistance R8 of other end ground connection, just
Pole is connected with the emitter stage of audion VT1, the polar capacitor C4 of minus earth, and the positive pole phase of one end and polar capacitor C4
The resistance R9 composition that connection, the other end are connected with the negative pole of polar capacitor C4；The plus earth of described amplifier P1；Described three
The colelctor electrode of pole pipe VT1 is connected with the positive pole of polar capacitor C3 and the positive pole of polar capacitor C12 respectively.
A kind of audio signal processing based on equalization amplifying circuit the most according to claim 3, it is characterised in that institute
Stating signal output processing circuit by amplifier P2, amplifier P3, positive pole is connected with the positive pole of amplifier P2, negative pole and audion
Polar capacitor C7, the N pole that the colelctor electrode of VT2 is connected outfan with amplifier P2 after resistance R14 is connected, P pole is through electricity
The diode D5 that is connected with the positive pole of amplifier P2 after resistance R13, one end is connected with the outfan of amplifier P2, the other end and
The resistance R15 that the positive pole of amplifier P3 is connected, positive pole is connected with the negative pole of amplifier P2, negative pole after resistance R16 with put
Polar capacitor C8, the N pole that the outfan of big device P2 is connected is connected with the negative pole of amplifier P3, the diode D6 of P pole ground connection,
And the pole that positive pole is connected with the outfan of amplifier P3, negative pole is connected with the N pole of diode D6 after adjustable resistance R17
Property electric capacity C9 composition；The negative pole of described polar capacitor C9 as signal output processing circuit outfan and and power amplification circuit
It is connected.
A kind of audio signal processing based on equalization amplifying circuit the most according to claim 4, it is characterised in that institute
State power amplification circuit by amplifier P4, audion VT4, P pole is connected with the positive pole of amplifier P4, N pole after resistance R18 with
The diode D7 that the negative pole of polar capacitor C9 is connected, positive pole with process chip U OUT pin be connected, 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 equalization amplifying circuit the most according to claim 5, it is characterised in that institute
Stating process chip U is the integrated chip of AD736.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610550779.3A CN106210985A (en) | 2016-07-13 | 2016-07-13 | A kind of audio signal processing based on equalization amplifying circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610550779.3A CN106210985A (en) | 2016-07-13 | 2016-07-13 | A kind of audio signal processing based on equalization amplifying circuit |
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| CN106210985A true CN106210985A (en) | 2016-12-07 |
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| CN201610550779.3A Pending CN106210985A (en) | 2016-07-13 | 2016-07-13 | A kind of audio signal processing based on equalization amplifying circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120796A (en) * | 2019-05-22 | 2019-08-13 | 昆明理工大学津桥学院 | Voice signal filtering and amplifying circuit |
-
2016
- 2016-07-13 CN CN201610550779.3A patent/CN106210985A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120796A (en) * | 2019-05-22 | 2019-08-13 | 昆明理工大学津桥学院 | Voice signal filtering and amplifying circuit |
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