CN106060718A - Audio signal processing system based on frequency error correction circuit - Google Patents
Audio signal processing system based on frequency error correction circuit Download PDFInfo
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- CN106060718A CN106060718A CN201610550764.7A CN201610550764A CN106060718A CN 106060718 A CN106060718 A CN 106060718A CN 201610550764 A CN201610550764 A CN 201610550764A CN 106060718 A CN106060718 A CN 106060718A
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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Abstract
The invention discloses an audio signal processing system based on a frequency error correction circuit. The system is characterized by being composed of a processing chip U, a triode VT2, a triode VT3, a diode D4, a polar capacitor C5, a second-order filtering circuit, a power amplifier circuit, a signal output processing circuit connected with the collector of the triode VT2, and the frequency error correction circuit connected between the signal output processing circuit and the power amplifier circuit in series. According to the system, interference signals in sample audio signals are eliminated or inhibited; moreover, the frequency of the sample audio signals is enabled to be far higher than the highest frequency of the input audio signals; the frequency of the sample audio signals at least is 2.5 times of the highest frequency of the input audio signals; and the processing accuracy of the audio signals can be improved.
Description
Technical field
The present invention relates to electronic applications, specifically, be a kind of Audio Signal Processing based on correction of frequency errors 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 correction of frequency errors circuit audio signal processing.
The present invention is achieved through the following technical solutions: a kind of Audio Signal Processing system based on correction of frequency errors 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, is serially connected in the power amplification between the colelctor electrode of audion VT3 and the OUT pin processing chip U
Circuit, the signal output processing circuit being connected with the colelctor electrode of audion VT2, and be serially connected in signal output processing circuit with
Correction of frequency errors circuit composition between power amplification circuit；The base stage of described audion VT2 and the COM pipe processing chip U
Foot is connected；The emitter stage of described audion VT3 is connected with the CM pin processing chip U；The VS pin of described process chip U
It is connected with power supply.
Described correction of frequency errors electricity routing amplifier P5, audion VT5, audion VT6, field effect transistor MOS, positive pole warp
The polar capacitor C12 that after resistance R24, the colelctor electrode with audion VT5 is connected, negative pole is connected with signal output processing circuit,
The adjustable resistance R25 that one end is connected with the positive pole of polar capacitor C12, the other end is connected with the base stage of audion VT6, one end
Be connected with the emitter stage of audion VT5, resistance R26, the N pole of other end ground connection is connected with the base stage of audion VT6, P pole
The diode D9 being connected with the base stage of audion VT5, positive pole colelctor electrode with audion VT6 after resistance R27 is connected, negative
The polar capacitor C13 of pole ground connection, positive pole emitter stage with audion VT6 after resistance R28 is connected, negative pole is after resistance R29
Polar capacitor C14, the N pole being connected with the positive pole of amplifier P5 source electrode with field effect transistor MOS after resistance R30 is connected, P
The diode D10 that pole is connected with the positive pole of polar capacitor C14, negative pole is connected with the grid of field effect transistor MOS, positive pole is through electricity
The polar capacitor C15 that is connected with the positive pole of amplifier P5 after resistance R31, and N pole after resistance R33 with the output of amplifier P5
The diode D11 composition that end is connected, P pole negative pole with amplifier P5 after resistance R32 is connected；Described amplifier P5's is negative
Pole also ground connection, its outfan are also connected with the drain electrode of field effect transistor MOS；The outfan of described amplifier P5 is as frequency error
The outfan of correcting circuit is also connected with power amplification circuit.
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 the positive pole of polar capacitor C3 and the IN pin phase that processes chip U
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
The negative pole of polar capacitor C12 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, outfan with amplifier P5 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) phase place in audio signal or frequency error can be adjusted by the present invention, ensure that the present invention is to sound
The accuracy of audio signalprocessing.
(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 correction of frequency errors 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, correction of frequency errors 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 serially connected between the colelctor electrode of audion VT3 and the OUT pin processing chip U.Signal output processes electricity
Road is connected with the colelctor electrode of audion VT2.Correction of frequency errors circuit is serially connected in signal output processing circuit and power amplification
Between circuit.
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 the negative pole of polar capacitor C12.
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 then after resistance R18 with amplifier
The outfan of P5 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 correction of frequency errors electricity routing amplifier P5, audion VT5, audion VT6, field effect transistor
MOS, resistance R24, adjustable resistance R25, resistance R26, resistance R27, resistance R28, resistance R29, resistance R30, resistance R31, resistance
R32, resistance R33, polar capacitor C12, polar capacitor C13, polar capacitor C14, polar capacitor C15, diode D9, diode
D10, and diode D11 composition.
During connection, the positive pole of polar capacitor C12 colelctor electrode with audion VT5 after resistance R24 is connected, its negative pole then
For being connected with signal output processing circuit.One end of adjustable resistance R25 is connected with the positive pole of polar capacitor C12, its another
End then base stage with audion VT6 is connected.One end of resistance R26 is connected with the emitter stage of audion VT5, its other end then
Ground connection.The N pole of diode D9 is connected with the base stage of audion VT6, its P pole is connected with the base stage of audion VT5.
Wherein, the positive pole of polar capacitor C13 colelctor electrode with audion VT6 after resistance R27 is connected, its negative pole then connects
Ground.The positive pole of polar capacitor C14 emitter stage with audion VT6 after resistance R28 is connected, its negative pole is then after resistance R29
It is connected with the positive pole of amplifier P5.The N pole of diode D10 source electrode with field effect transistor MOS after resistance R30 is connected, its P
Pole then positive pole with polar capacitor C14 is connected.
Meanwhile, the negative pole of polar capacitor C15 be connected with the grid of field effect transistor MOS, its positive pole then after resistance R31 with
The positive pole of amplifier P5 is connected.The N pole of diode D11 outfan with amplifier P5 after resistance R33 is connected, its P pole
Then after resistance R32, negative pole with amplifier P5 is connected.The negative pole also ground connection of described amplifier P5, its outfan are also imitated with field
Should the drain electrode of pipe MOS be connected；The outfan of described amplifier P5 as correction of frequency errors circuit outfan and and power
Amplifying 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 phase place in audio signal or frequency error can be adjusted by the present invention, ensure that the present invention couple
The accuracy of Audio Signal Processing.The present invention can make the frequency range of audio signal be maintained at 10HZ-25HZ, ensures that this
The accuracy to Audio Signal Processing of invention, effectively raises the audio quality of audio reception device output.
According to above-described embodiment, can well realize the present invention.
Claims (6)
1. an audio signal processing based on correction of frequency errors 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, is serially connected in the power amplification circuit between the colelctor electrode of audion VT3 and the OUT pin processing chip U, with audion VT2
The signal output processing circuit that is connected of colelctor electrode, and be serially connected between signal output processing circuit and power amplification circuit
Correction of frequency errors circuit composition；The base stage of described audion VT2 is connected with the COM pin processing chip U；Described three poles
The emitter stage of pipe 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 correction of frequency errors circuit the most according to claim 1, its feature exists
In, described correction of frequency errors electricity routing amplifier P5, audion VT5, audion VT6, field effect transistor MOS, positive pole is through resistance
The polar capacitor C12 that after R24, the colelctor electrode with audion VT5 is connected, negative pole is connected with signal output processing circuit, one end
Be connected with the positive pole of polar capacitor C12, adjustable resistance R25 that the other end is connected with the base stage of audion VT6, one end and three
The emitter stage of pole pipe VT5 is connected, resistance R26, the N pole of other end ground connection is connected with the base stage of audion VT6, P pole and three
The diode D9 that the base stage of pole pipe VT5 is connected, positive pole colelctor electrode with audion VT6 after resistance R27 is connected, negative pole connects
The polar capacitor C13 on ground, positive pole emitter stage with audion VT6 after resistance R28 is connected, negative pole after resistance R29 with put
Polar capacitor C14, the N pole that the positive pole of big device P5 is connected source electrode with field effect transistor MOS after resistance R30 is connected, P pole with
The diode D10 that the positive pole of polar capacitor C14 is connected, negative pole is connected with the grid of field effect transistor MOS, positive pole is through resistance
The polar capacitor C15 that after R31, positive pole with amplifier P5 is connected, and N pole after resistance R33 with the outfan of amplifier P5
Be connected, diode D11 composition that P pole negative pole with amplifier P5 after resistance R32 is connected；The negative pole of described amplifier P5
Also ground connection, its outfan is also connected with the drain electrode of field effect transistor MOS；The outfan of described amplifier P5 is as frequency error school
The outfan of positive circuit is also connected with power amplification circuit.
A kind of audio signal processing based on correction of frequency errors 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 correction of frequency errors 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 polarity
The negative pole of electric capacity C12 is connected.
A kind of audio signal processing based on correction of frequency errors 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, outfan with amplifier P5 is connected, positive pole with process chip U OUT pin be connected, negative pole
Polar capacitor C6, the N pole that positive pole with amplifier P4 is connected after resistance R19 is connected with the colelctor electrode of audion VT3, P
The diode D8 that pole base stage with audion VT4 after resistance R23 is connected, one end is connected with the N pole of diode D8, another
The adjustable resistance R22 that is connected with the negative pole of amplifier P4 of end, positive pole is connected with the emitter stage of audion VT4, negative pole sequentially
Through the polar capacitor C11 that inductance L2 outfan with amplifier P4 after resistance R21 is connected, and positive pole is after resistance R20
Be connected with the outfan of amplifier P4, negative pole forms as the polar capacitor C10 of the outfan of power amplification circuit；Described three
The emitter stage of pole pipe VT4 is connected with the negative pole of amplifier P4, its grounded collector.
A kind of audio signal processing based on correction of frequency errors 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 |
|---|---|---|---|
| CN201610550764.7A CN106060718A (en) | 2016-07-13 | 2016-07-13 | Audio signal processing system based on frequency error correction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610550764.7A CN106060718A (en) | 2016-07-13 | 2016-07-13 | Audio signal processing system based on frequency error correction circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106060718A true CN106060718A (en) | 2016-10-26 |
Family
ID=57185482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610550764.7A Pending CN106060718A (en) | 2016-07-13 | 2016-07-13 | Audio signal processing system based on frequency error correction circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106060718A (en) |
-
2016
- 2016-07-13 CN CN201610550764.7A patent/CN106060718A/en active Pending
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