CN105898653A - Audio signal processing system based on dynamic signal adjusting circuit - Google Patents
Audio signal processing system based on dynamic signal adjusting circuit Download PDFInfo
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- CN105898653A CN105898653A CN201610369822.6A CN201610369822A CN105898653A CN 105898653 A CN105898653 A CN 105898653A CN 201610369822 A CN201610369822 A CN 201610369822A CN 105898653 A CN105898653 A CN 105898653A
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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
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- Acoustics & Sound (AREA)
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Abstract
The invention discloses an audio signal processing system based on a dynamic signal adjusting circuit. The audio signal processing system is characterized by mainly comprising a processing chip U, a field-effect tube silent circuit, an audion VT2, an amplifier P2, a polar capacitor C4, a diode D3, a polar capacitor C5, a signal amplification circuit, a linear filter circuit and the dynamic signal adjusting circuit, wherein the signal amplification circuit is respectively connected with the processing chip U and the N pole of the diode D3; the linear filter circuit is respectively connected with the anode input end of the amplifier P2 and the signal amplification circuit; and the dynamic signal adjusting circuit is connected between the emitter of the audion VT2 and the field-effect tube silent circuit in series. According to the audio signal processing system disclosed by the invention, an interference signal in an audio signal can be effectively eliminated; furthermore, the frequency bandwidth of the audio signal can be adjusted; distortion of the audio signal when being output can be effectively prevented; noise of the audio signal when being transmitted is effectively eliminated; and the listening effect of users is ensured.
Description
Technical field
The present invention relates to electronic applications, specifically, be a kind of audio frequency letter adjusting circuit based on signal dynamics
Number processing system.
Background technology
Audio reception device has been daily life, learn, work in indispensable instrument, and audio frequency connects
The working stability of receiving unit be otherwise depending on audio frequency processing system.But existing audio frequency processing system without
Interference signal in audio signal is eliminated by method, it is impossible to be adjusted the bandwidth of audio signal,
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 interference signal that can eliminate in audio signal, again can be to the frequency band of audio signal
The audio frequency processing system that is adjusted of width be the task of top priority.
Summary of the invention
The signal processing system that it is an object of the invention to overcome face identification system of the prior art is anti-interference
Ability, it is impossible to the defect that the bandwidth of audio signal is adjusted, it is provided that one move based on signal
State adjusts the audio signal processing of circuit.
The present invention is achieved through the following technical solutions: a kind of audio signal adjusting circuit based on signal dynamics
Processing system, mainly by processing chip U, audion VT2, amplifier P2, with place after positive electrode resistance R9
The SADN pin of reason chip U is connected, negative pole base stage with audion VT2 after resistance R11 is connected
Polar capacitor C4, N pole be connected with the FB pin processing chip U, the output of P pole and amplifier P2
The diode D3 that end is connected, positive pole is connected with the negative input of amplifier P2, the pole of minus earth
Property electric capacity C5, respectively with the signal amplification circuit that is connected of N pole processing chip U and diode D3, point
The linear filtering circuit not being connected with electrode input end and the signal amplification circuit of amplifier P2, respectively with three
The field effect transistor squelch circuit that the emitter stage of pole pipe VT2 is connected with process chip U, and it is serially connected in three poles
Signal dynamics between emitter stage and the field effect transistor squelch circuit of pipe VT2 adjusts circuit composition；Described three poles
The colelctor electrode of pipe VT2 and the equal ground connection of GND pin processing chip U；The REF pipe of described process chip U
Foot is connected with LBI pin.
Described signal dynamics adjusts circuit by audion VT3, field effect transistor MOS2, amplifier P3, N pole
Be connected with the grid of field effect transistor MOS2, P pole sequentially after resistance R20 and resistance R21 with audion
The diode D6 that the emitter stage of VT3 is connected, negative pole is connected with the junction point of resistance R20 with resistance R21,
The polar capacitor C10 that positive pole electrode input end with amplifier P3 after resistance R23 is connected, negative pole is through electricity
Be connected with the outfan of amplifier P3 after resistance R25, positive pole after resistance R22 with the base of audion VT3
Polar capacitor C11, the P pole that pole is connected emitter stage with audion VT3 after resistance R24 is connected, N
Diode D7, P pole that pole negative pole with polar capacitor C11 after resistance R26 is connected and field effect transistor
The diode D8 that the source electrode of MOS2 is connected, N pole is connected with the colelctor electrode of audion VT3, positive pole warp
After resistance R18 the drain electrode with field effect transistor MOS2 be connected, the polar capacitor C9, Yi Jiyi of minus earth
The resistance that end is connected with the negative pole of polar capacitor C9, the other end is connected with the colelctor electrode of audion VT3
R19 forms；The source electrode of described field effect transistor MOS2 is connected with the emitter stage of audion VT3；Described two
The P pole of pole pipe D6 is connected with the emitter stage of audion VT2；The outfan of described amplifier P3 is as letter
The outfan of number dynamic regulating circuit is also connected with field effect transistor squelch circuit.
Described linear filtering electricity routing amplifier P1, negative pole as the input of linear filtering circuit, positive pole with
Polar capacitor C1, the N pole that the electrode input end of amplifier P1 is connected after resistance R3 with amplifier P1
The diode that outfan is connected, P pole electrode input end with amplifier P1 after resistance R1 is connected
D1, negative pole is connected with the outfan of amplifier P1, positive pole after resistance R4 with the negative pole of amplifier P1
The polar capacitor C2 that input is connected, one end is connected with the negative pole of polar capacitor C2, the other end with put
The inductance L that the negative input of big device P1 is connected, and the negative input phase of one end and amplifier P1
Connect, other end earth resistance R5 forms；The negative pole of described polar capacitor C2 is defeated with the positive pole of amplifier P2
Enter end to be connected；The outfan of described amplifier P1 is connected with signal amplification circuit.
Described signal amplification circuit by audion VT1, P pole with process chip U LBI pin be connected,
The diode D2 that N pole is sequentially connected with the LX pin processing chip U after resistance R8 through resistance R7,
The resistance that one end is connected with the N pole of diode D2, the other end is connected with the colelctor electrode of audion VT1
R6, the pole that negative pole is connected with the base stage of audion VT1, positive pole is connected with the outfan of amplifier P1
Property electric capacity C3, and one end is connected with the emitter stage of audion VT1, the other end and process chip U
The adjustable resistance R10 composition that FB pin is connected；The emitter stage of described audion VT1 is through adjustable resistance R10
It is connected with the N pole of diode D3 afterwards.
Described field effect transistor squelch circuit is by the grid of field effect transistor MOS1, N pole and field effect transistor MOS1
Be connected, diode D4 that P pole outfan with amplifier P3 after resistance R12 is connected, negative pole with
The drain electrode of field effect transistor MOS1 is connected, positive pole after resistance R13 with process chip U GND pin
The polar capacitor C6 of ground connection after being connected, positive pole is connected with the VOUT pin processing chip U, negative pole warp
Polar capacitor C8, the P pole being connected with the source electrode of field effect transistor MOS1 after resistance R14 is after resistance R15
Be connected with the LBO pin processing chip U, N pole is as two poles of the outfan of field effect transistor squelch circuit
Pipe D5, positive pole N pole with diode D5 after resistance R17 is connected, the polar capacitor of minus earth
C7, and one end is connected with the drain electrode of field effect transistor MOS1, the other end is connected with polar capacitor C7's
The resistance R16 composition connect；The negative pole of described polar capacitor C8 is connected with the P pole of diode D5.
For the practical effect of the present invention, described process chip U preferentially have employed as IW1761 integrated
Chip realizes.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) present invention can not only effectively eliminate the interference signal in audio signal, and can effectively reduce
The noise of audio signal, meanwhile, the bandwidth of audio signal can be adjusted by the present invention, effectively prevents
When having stopped audio signal output distortion occurs, thus miscellaneous when the present invention has effectively eliminated audio signal transmission
Sound, it is ensured that the audibility of user.
(2) present invention can effectively improve the dynamic frequency of audio signal, makes the audio signal that the present invention exports
Consistent with the audio signal of input, though the sound play of audio signal that exports of the present invention and sound source phase
With, thus have the tonequality that improve audio reception device output that the present invention imitates, it is ensured that audio signal transmission
Time without noise.
(3) present invention bandwidth increase of audio signal can be led existing audio signal bandwidth 2
More than Bei, thus effectively raise audio signal components, it is ensured that the tonequality of audio reception device output.
(4) present invention can make the frequency range of audio signal be maintained at 10HZ-22HZ, thus effectively improves
The tonequality of audio reception device output, it is ensured that during audio signal transmission without noise.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram that signal dynamics of the present invention adjusts circuit.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is described in further detail, but the enforcement of the present invention
Mode is not limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by processing chip U, audion VT2, amplifier P2, resistance
R9, resistance R11, polar capacitor C4, polar capacitor C5, diode D3, signal dynamics adjusts circuit,
Signal amplification circuit, linear filtering circuit, and field effect transistor squelch circuit composition.
During enforcement, it is connected with the SADN pin processing chip U after positive electrode resistance R9 of polar capacitor C4
Connect, negative pole base stage with audion VT2 after resistance R11 is connected.The N pole of diode D3 and process
The FB pin of chip U is connected, P pole is connected with the outfan of amplifier P2.Polar capacitor C5's
Positive pole is connected with the negative input of amplifier P2, minus earth.Signal amplification circuit respectively with process core
The N pole of sheet U and diode D3 is connected.Linear filtering circuit respectively with the electrode input end of amplifier P2
It is connected with signal amplification circuit.Field effect transistor squelch circuit respectively with emitter stage and the process of audion VT2
Chip U is connected.Signal dynamics adjusts circuit and is serially connected in emitter stage and the field effect transistor noise elimination of audion VT2
Between circuit.The colelctor electrode of described audion VT2 and the equal ground connection of GND pin processing chip U；Described
The REF pin processing chip U is connected with LBI pin.
Wherein, described linear filtering electricity routing amplifier P1, resistance R1, resistance R2, resistance R3, electricity
Resistance R4, resistance R5, polar capacitor C1, polar capacitor C2, inductance L, regulation diode D1 composition.
During connection, the negative pole of polar capacitor C1 as the input of linear filtering circuit and is adopted with audio signal
Storage is connected, its positive pole is connected with the electrode input end of amplifier P1.The N pole of diode D1 is through electricity
Be connected with the outfan of amplifier P1 after resistance R3, its P pole after resistance R1 with the positive pole of amplifier P1
Input is connected.The negative pole of polar capacitor C2 is connected with the outfan of amplifier P1, its positive pole is through electricity
It is connected with the negative input of amplifier P1 after resistance R4.One end of inductance L is negative with polar capacitor C2's
Pole is connected, its other end is connected with the negative input of amplifier P1.One end of resistance R5 and amplification
The negative input of device P1 is connected, its other end ground connection.The negative pole of described polar capacitor C2 and amplifier
The electrode input end of P2 is connected；The outfan of described amplifier P1 is connected with signal amplification circuit.
Further, described signal amplification circuit by audion VT1, resistance R6, resistance R7, resistance R8,
Adjustable resistance R10, polar capacitor C3, and diode D2 form.
During connection, the P pole of diode D2 with process chip U LBI pin be connected, its N pole sequentially
It is connected with the LX pin processing chip U after resistance R8 through resistance R7.One end of resistance R6 and two
The N pole of pole pipe D2 is connected, its other end is connected with the colelctor electrode of audion VT1.Polar capacitor C3
Negative pole be connected with the base stage of audion VT1, its positive pole is connected with the outfan of amplifier P1.Adjustable
One end of resistance R10 is connected with the emitter stage of audion VT1, its other end with process chip U FB
Pin is connected.The emitter stage of described audion VT1 after adjustable resistance R10 with the N pole of diode D3
It is connected.
Further, described field effect transistor squelch circuit is by field effect transistor MOS1, resistance R12, resistance
R13, resistance R14, resistance R15, resistance R16, resistance R17, polar capacitor C6, polar capacitor C7,
Polar capacitor C8, diode D4, and diode D5 form.
During connection, the N pole of diode D4 is connected with the grid of field effect transistor MOS1, its P pole is through electricity
It is connected with the outfan of amplifier P3 after resistance R12.The negative pole of polar capacitor C6 and field effect transistor MOS1
Drain electrode be connected, its positive pole after resistance R13 with process chip U GND pin be connected after ground connection.
The positive pole of polar capacitor C8 is connected with the VOUT pin processing chip U, its negative pole is after resistance R14
It is connected with the source electrode of field effect transistor MOS1.
Wherein, the P pole of diode D5 after resistance R15 with process chip U LBO pin be connected,
Its N pole as the outfan of field effect transistor squelch circuit and is connected with exterior broadcaster.Polar capacitor C7
Positive pole N pole with diode D5 after resistance R17 be connected, its minus earth.The one of resistance R16
End is connected with the drain electrode of field effect transistor MOS1, its other end is connected with polar capacitor C7's.Described
The negative pole of polar capacitor C8 is connected with the P pole of diode D5.
As in figure 2 it is shown, described signal dynamics adjustment circuit is by audion VT3, field effect transistor MOS2, put
Big device P3, resistance R18, resistance R19, resistance R20, resistance R21, resistance R22, resistance R23, electricity
Resistance R24, resistance R25, resistance R26, polar capacitor C9, polar capacitor C10, polar capacitor C11,
Diode D6, diode D7, and diode D8 form.
During connection, the N pole of diode D6 is connected with the grid of field effect transistor MOS2, its P pole sequentially
It is connected through resistance R20 emitter stage with audion VT3 after resistance R21.The negative pole of polar capacitor C10
Be connected with the junction point of resistance R20 with resistance R21, its positive pole after resistance R23 with amplifier P3's
Electrode input end is connected.The negative pole of polar capacitor C11 after resistance R25 with the outfan phase of amplifier P3
Connect, its positive pole base stage with audion VT3 after resistance R22 is connected.
Wherein, the P pole of diode D7 emitter stage with audion VT3 after resistance R24 be connected, its
N pole negative pole with polar capacitor C11 after resistance R26 is connected.The P pole of diode D8 and field effect
The source electrode of pipe MOS2 is connected, its N pole is connected with the colelctor electrode of audion VT3.Polar capacitor C9
Positive pole drain electrode with field effect transistor MOS2 after resistance R18 be connected, its minus earth.Resistance R19
One end be connected with the negative pole of polar capacitor C9, its other end is connected with the colelctor electrode of audion VT3.
The source electrode of described field effect transistor MOS2 is connected with the emitter stage of audion VT3；Described diode
The P pole of D6 is connected with the emitter stage of audion VT2；The outfan of described amplifier P3 moves as signal
State adjusts the outfan of circuit and is connected with field effect transistor squelch circuit.
During operation, the present invention can not only effectively eliminate the interference signal in audio signal, effectively reduces audio frequency
The noise of signal；And the bandwidth of audio signal can be adjusted by the present invention, is effectively prevented sound
During signal output frequently, distortion occurs.Meanwhile, the present invention can effectively improve the dynamic frequency of audio signal, makes
The audio signal of present invention output is consistent with the audio signal of input, though the audio signal institute of present invention output
The sound play is identical with sound source, thus has what the present invention imitated to improve the tonequality that audio reception device exports,
When ensure that audio signal transmission without noise.
The present invention bandwidth increase of audio signal can be led 2 times of the bandwidth of existing audio signal with
On, thus effectively raise audio signal components, it is ensured that the tonequality of audio reception device output.This
The bright frequency range that can make audio signal is maintained at 10HZ-22HZ, thus effectively raises audio frequency reception and set
The tonequality of standby output, it is ensured that during audio signal transmission without noise.For the practical effect of the present invention,
Described process chip U preferentially have employed and realizes for the integrated chip of IW1761.
According to above-described embodiment, can well realize the present invention.
Claims (6)
1. the audio signal processing adjusting circuit based on signal dynamics, it is characterised in that main
By processing chip U, audion VT2, amplifier P2, with the SADN processing chip U after positive electrode resistance R9
The polar capacitor C4, N that pin is connected, negative pole base stage with audion VT2 after resistance R11 is connected
Pole and the diode that FB pin is connected, P pole is connected with the outfan of amplifier P2 processing chip U
D3, positive pole is connected with the negative input of amplifier P2, the polar capacitor C5 of minus earth, respectively with
Process the signal amplification circuit that the N pole of chip U and diode D3 is connected, respectively with amplifier P2 just
The linear filtering circuit that pole input is connected with signal amplification circuit, respectively with the emitter stage of audion VT2
With process the field effect transistor squelch circuit that is connected of chip U, and be serially connected in the emitter stage of audion VT2 with
Signal dynamics between field effect transistor squelch circuit adjusts circuit composition；The colelctor electrode of described audion VT2 with
Process the equal ground connection of GND pin of chip U；The REF pin of described process chip U is connected with LBI pin
Connect.
A kind of Audio Signal Processing system adjusting circuit based on signal dynamics the most according to claim 1
System, it is characterised in that described signal dynamics adjustment circuit, by audion VT3, field effect transistor MOS2, is put
Big device P3, N pole is connected with the grid of field effect transistor MOS2, P pole is sequentially through resistance R20 and resistance R21
The diode D6 that emitter stage with audion VT3 is connected afterwards, negative pole is with resistance R20 and resistance R21's
The polar capacitor that junction point is connected, positive pole electrode input end with amplifier P3 after resistance R23 is connected
C10, negative pole outfan with amplifier P3 after resistance R25 is connected, positive pole after resistance R22 with three
Polar capacitor C11, the P pole that the base stage of pole pipe VT3 is connected after resistance R24 with audion VT3 send out
The diode D7, P that emitter-base bandgap grading is connected, N pole negative pole with polar capacitor C11 after resistance R26 is connected
Two poles that pole is connected with the source electrode of field effect transistor MOS2, N pole is connected with the colelctor electrode of audion VT3
Pipe D8, positive pole drain electrode with field effect transistor MOS2 after resistance R18 is connected, the polarity electricity of minus earth
Hold C9, and one end is connected with the negative pole of polar capacitor C9, the colelctor electrode of the other end and audion VT3
The resistance R19 composition being connected；The emitter stage phase of the source electrode of described field effect transistor MOS2 and audion VT3
Connect；The P pole of described diode D6 is connected with the emitter stage of audion VT2；Described amplifier P3's
Outfan adjusts the outfan of circuit as signal dynamics and is connected with field effect transistor squelch circuit.
A kind of Audio Signal Processing system adjusting circuit based on signal dynamics the most according to claim 2
System, it is characterised in that described linear filtering electricity routing amplifier P1, negative pole is defeated as linear filtering circuit
Enter end, polar capacitor C1, the N pole that is connected with the electrode input end of amplifier P1 of positive pole after resistance R3
Be connected with the outfan of amplifier P1, P pole electrode input end with amplifier P1 after resistance R1 is connected
The diode D1 connect, negative pole is connected with the outfan of amplifier P1, positive pole after resistance R4 with amplifier
The polar capacitor C2 that the negative input of P1 is connected, one end is connected with the negative pole of polar capacitor C2, separately
The inductance L that one end is connected with the negative input of amplifier P1, and the negative pole of one end and amplifier P1
Input is connected, other end earth resistance R5 composition；The negative pole of described polar capacitor C2 and amplifier P2
Electrode input end be connected；The outfan of described amplifier P1 is connected with signal amplification circuit.
A kind of Audio Signal Processing system adjusting circuit based on signal dynamics the most according to claim 3
System, it is characterised in that described signal amplification circuit is by audion VT1, P pole and the LBI processing chip U
Pin is connected, N pole is sequentially connected with the LX pin processing chip U after resistance R8 through resistance R7
Diode D2, one end is connected with the N pole of diode D2, the colelctor electrode of the other end and audion VT1
The resistance R6 being connected, negative pole is connected with the base stage of audion VT1, the output of positive pole and amplifier P1
The polar capacitor C3 that is connected of end, and one end is connected with the emitter stage of audion VT1, the other end and place
The adjustable resistance R10 composition that the FB pin of reason chip U is connected；The emitter stage warp of described audion VT1
After adjustable resistance R10, the N pole with diode D3 is connected.
A kind of Audio Signal Processing system adjusting circuit based on signal dynamics the most according to claim 4
System, it is characterised in that described field effect transistor squelch circuit is by field effect transistor MOS1, N pole and field effect transistor
The diode that the grid of MOS1 is connected, P pole outfan with amplifier P3 after resistance R12 is connected
D4, negative pole is connected with the drain electrode of field effect transistor MOS1, positive pole after resistance R13 with process chip U
GND pin be connected after the polar capacitor C6 of ground connection, positive pole is connected with the VOUT pin processing chip U
Connect, polar capacitor C8, P pole warp that negative pole is connected with the source electrode of field effect transistor MOS1 after resistance R14
After resistance R15 with process chip U LBO pin be connected, N pole defeated as field effect transistor squelch circuit
Going out the diode D5 of end, positive pole N pole with diode D5 after resistance R17 is connected, minus earth
Polar capacitor C7, and one end is connected with the drain electrode of field effect transistor MOS1, the other end and polar capacitor
The resistance R16 the being connected composition of C7；The P pole phase of the negative pole of described polar capacitor C8 and diode D5
Connect.
A kind of Audio Signal Processing system adjusting circuit based on signal dynamics the most according to claim 5
System, it is characterised in that described process chip U is the integrated chip of IW1761.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610369822.6A CN105898653A (en) | 2016-05-28 | 2016-05-28 | Audio signal processing system based on dynamic signal adjusting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610369822.6A CN105898653A (en) | 2016-05-28 | 2016-05-28 | Audio signal processing system based on dynamic signal adjusting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105898653A true CN105898653A (en) | 2016-08-24 |
Family
ID=56709658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610369822.6A Pending CN105898653A (en) | 2016-05-28 | 2016-05-28 | Audio signal processing system based on dynamic signal adjusting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105898653A (en) |
-
2016
- 2016-05-28 CN CN201610369822.6A patent/CN105898653A/en active Pending
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