CN104469612A - Filter frequency adjustable audio processing system based on phase shift processing - Google Patents
Filter frequency adjustable audio processing system based on phase shift processing Download PDFInfo
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- CN104469612A CN104469612A CN201410691802.1A CN201410691802A CN104469612A CN 104469612 A CN104469612 A CN 104469612A CN 201410691802 A CN201410691802 A CN 201410691802A CN 104469612 A CN104469612 A CN 104469612A
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Abstract
The invention discloses a filter frequency adjustable audio processing system based on phase shift processing. The filter frequency adjustable audio processing system is mainly composed of an audio collection module, a frequency selection circuit connected with the audio collection module, a micro processing circuit connected with the frequency selection circuit, an adjustable filter circuit connected with the micro processing circuit and an amplifying circuit. The filter frequency adjustable audio processing system is characterized in that a phase shift processing circuit is further arranged between the amplifying circuit and the micro processing circuit; the phase shift processing circuit is composed of a phase shift chip U1, a triode VT4, a triode VT5, a resistor R6, a polar capacitor C6 and the like, wherein one end of the resistor R6 is connected with the VCC+ pin of the phase shift chip U1, the other end of the resistor R6 is connected with the IN1 pin of the phase shift chip U1, the cathode of the polar capacitor C6 is connected with the IN1 pin of the phase shift chip U1 after passing through a resistor R5, and the anode of the polar capacitor C6 is connected with the IN2 pin of the phase shift chip U1. According to the filter frequency adjustable audio processing system, the phase shift circuit is adopted to make the filtering effect of the audio processing system be better, interference, with the audio processing system, of the unnecessary wave frequency is avoided, and thus the film playing quality is improved.
Description
Technical field
The present invention relates to a kind of electronic system, specifically refer to the adjustable audio frequency processing system of a kind of frequency filtering based on phase shift process.
Background technology
Along with people pursue more and more higher to quality of life, present home theater enters into every household substantially, brings very large enjoyment to people's life.But, often there will be noise when people watch film, thus have influence on film play quality.
Summary of the invention
The object of the invention is to overcome the bad defect of current audio treatment system filter effect, provide a kind of frequency filtering based on phase shift process adjustable audio frequency processing system.
The following technical scheme of object of the present invention realizes: the adjustable audio frequency processing system of a kind of frequency filtering based on phase shift process, primarily of audio collection module, the frequency selection circuit be connected with audio collection module, the micro-processor interface circuit be connected with frequency selection circuit, the tunable filter circuit be connected with micro-processor interface circuit, and amplifying circuit composition, between amplifying circuit and micro-processor interface circuit, be also provided with phase shift treatment circuit, described phase shift treatment circuit is by phase shift chip U1, triode VT4, triode VT5, one end is connected with the VCC+ pin of phase shift chip U1, the resistance R6 that the other end is connected with the IN1 pin of phase shift chip U1, negative pole is connected with the IN1 pin of phase shift chip U1 after resistance R5, the polar capacitor C6 that positive pole is connected with the IN2 pin of phase shift chip U1, positive pole is connected with the NC pin of phase shift chip U1 after resistance R7, the polar capacitor C8 that negative pole is connected with the collector electrode of triode VT4, positive pole is connected with the OUT pin of phase shift chip U1, the polar capacitor C7 of minus earth, one end is connected with the OUT pin of phase shift chip U1, the potentiometer R8 that the other end is connected with amplifying circuit, P pole is connected with the OFF1 pin of phase shift chip U1, the diode D1 that N pole is connected with the base stage of triode VT4, and P pole is connected with the OFF2 pin of phase shift chip U1, the diode D2 that N pole is connected with the emitter of triode VT5 forms, VCC-pin ground connection, the OUT pin of described phase shift chip U1 are connected with the sliding end of potentiometer R8, the emitter of triode VT4 is connected with the base stage of triode VT5, the collector electrode of triode VT5 is connected with amplifying circuit, and the negative pole of electric capacity C6 is connected with micro-processor interface circuit.
Described frequency selection circuit is by electric capacity C1, and electric capacity C2, electric capacity C3, electric capacity C4, resistance R1, resistance R2 form; The positive pole of electric capacity C1 is connected with its negative pole in turn after resistance R1, electric capacity C3, electric capacity C4, resistance R2, electric capacity C2, electric capacity C1 is connected with an output of audio collection module with the tie point of resistance R1, electric capacity C2 is connected with another output of audio collection module with the tie point of resistance R2, and tie point and the resistance R2 of resistance R1 and electric capacity C3 are all connected with micro-processor interface circuit with the tie point of electric capacity C4.
Described micro-processor interface circuit is by triode VT1, triode VT2, the resistance R3 that one end is connected with the collector electrode of triode VT2, the other end is connected with the base stage of triode VT1, the electric capacity C5 that positive pole is connected with the base stage of triode VT1, negative pole is connected with the emitter of triode VT1, and the resistance R4 that one end is connected with the base stage of triode VT2, the other end is connected with the collector electrode of triode VT1 forms; The collector electrode of described triode VT2 is connected with the tie point of electric capacity C3 with resistance R1, its emitter is connected with tunable filter circuit, the emitter of triode VT1 is connected with the negative pole of electric capacity C6, and the negative pole of electric capacity C5 is connected with the tie point of resistance R2 with electric capacity C4.
Described tunable filter circuit is by operational amplifier T1, operational amplifier T2, triode VT3, positive pole is connected with the emitter of triode VT2, the electric capacity C11 that negative pole is connected with the output of operational amplifier T1 after potentiometer R16 through resistance R15, positive pole is connected with the normal phase input end of operational amplifier T1, the electric capacity C13 that negative pole is connected with the collector electrode of triode VT3, negative pole is connected with the output of operational amplifier T1, the electric capacity C12 that positive pole is connected with the positive pole of electric capacity C11 after resistance R14, positive pole is connected with the emitter of triode VT3, the electric capacity C14 that negative pole enters to be connected with the anti-phase defeated end of amplifier T2, one end is connected with the positive pole of electric capacity C14, the resistance R17 that the other end is then connected with the inverting input of operational amplifier T2 after potentiometer R18 forms, the inverting input of institute operational amplifier T1 is connected with the normal phase input end of operational amplifier T2, and the base stage of triode VT3 is connected with the negative pole of electric capacity C11, its emitter is also connected with the positive pole of electric capacity C12.
Described amplifying circuit is by operational amplifier T3, the electric capacity C9 that positive pole is connected with potentiometer R8, negative pole is connected with the collector electrode of triode VT5 after resistance R9, the electric capacity C10 that negative pole is connected with the negative pole of electric capacity C9, positive pole is connected with the positive pole of operational amplifier T3 after resistance R11, the resistance R10 that one end is connected with the positive pole of electric capacity C10, the other end is connected with the inverting input of operational amplifier T3 after resistance R12, and the resistance R13 be serially connected between the inverting input of operational amplifier T3 and output forms; The tie point ground connection of resistance R10 and resistance R12.
Described phase shift chip U1 is LM741 integrated chip.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the present invention adopts phase-shift circuit to make the filter effect of audio frequency processing system better, avoids audio frequency processing system to be subject to not needing ripple interference frequently, thus improves film play quality.
(2) phase shift chip of the present invention uses LM741 integrated chip, and its reaction speed is fast, cheap.
(3) as long as the present invention's adjustment potentiometer R16 and potentiometer R18, then can adjust the frequency filtering of audio frequency processing system, thus better can filter out noise.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the adjustable audio frequency processing system of frequency filtering based on phase shift process of the present invention, primarily of audio collection module, the frequency selection circuit be connected with audio collection module, the micro-processor interface circuit be connected with frequency selection circuit, the tunable filter circuit be connected with micro-processor interface circuit, and amplifying circuit composition, be also provided with phase shift treatment circuit between amplifying circuit and micro-processor interface circuit.
Wherein, phase shift treatment circuit is by phase shift chip U1, triode VT4, triode VT5, one end is connected with the VCC+ pin of phase shift chip U1, the resistance R6 that the other end is connected with the IN1 pin of phase shift chip U1, negative pole is connected with the IN1 pin of phase shift chip U1 after resistance R5, the polar capacitor C6 that positive pole is connected with the IN2 pin of phase shift chip U1, positive pole is connected with the NC pin of phase shift chip U1 after resistance R7, the polar capacitor C8 that negative pole is connected with the collector electrode of triode VT4, positive pole is connected with the OUT pin of phase shift chip U1, the polar capacitor C7 of minus earth, one end is connected with the OUT pin of phase shift chip U1, the potentiometer R8 that the other end is connected with amplifying circuit, P pole is connected with the OFF1 pin of phase shift chip U1, the diode D1 that N pole is connected with the base stage of triode VT4, and P pole is connected with the OFF2 pin of phase shift chip U1, the diode D2 that N pole is connected with the emitter of triode VT5 forms, VCC-pin ground connection, the OUT pin of described phase shift chip U1 are connected with the sliding end of potentiometer R8, the emitter of triode VT4 is connected with the base stage of triode VT5, the collector electrode of triode VT5 is connected with amplifying circuit, and the negative pole of electric capacity C6 is connected with micro-processor interface circuit.Phase shift treatment circuit can make the filter effect of audio frequency processing system better, improves film play quality.In order to ensure implementation result, described phase shift chip U1 elects LM741 integrated chip as.
Frequency selection circuit can screen signal, picks out useful signal.It is by electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, resistance R1, and resistance R2 forms; The positive pole of electric capacity C1 is connected with its negative pole in turn after resistance R1, electric capacity C3, electric capacity C4, resistance R2, electric capacity C2, electric capacity C1 is connected with an output of audio collection module with the tie point of resistance R1, electric capacity C2 is connected with another output of audio collection module with the tie point of resistance R2, and tie point and the resistance R2 of resistance R1 and electric capacity C3 are all connected with micro-processor interface circuit with the tie point of electric capacity C4.
Described micro-processor interface circuit is by triode VT1, triode VT2, the resistance R3 that one end is connected with the collector electrode of triode VT2, the other end is connected with the base stage of triode VT1, the electric capacity C5 that positive pole is connected with the base stage of triode VT1, negative pole is connected with the emitter of triode VT1, and the resistance R4 that one end is connected with the base stage of triode VT2, the other end is connected with the collector electrode of triode VT1 forms; The collector electrode of described triode VT2 is connected with the tie point of electric capacity C3 with resistance R1, its emitter is connected with tunable filter circuit, the emitter of triode VT1 is connected with the negative pole of electric capacity C6, and the negative pole of electric capacity C5 is connected with the tie point of resistance R2 with electric capacity C4.
Described tunable filter circuit is by operational amplifier T1, operational amplifier T2, triode VT3, positive pole is connected with the emitter of triode VT2, the electric capacity C11 that negative pole is connected with the output of operational amplifier T1 after potentiometer R16 through resistance R15, positive pole is connected with the normal phase input end of operational amplifier T1, the electric capacity C13 that negative pole is connected with the collector electrode of triode VT3, negative pole is connected with the output of operational amplifier T1, the electric capacity C12 that positive pole is connected with the positive pole of electric capacity C11 after resistance R14, positive pole is connected with the emitter of triode VT3, the electric capacity C14 that negative pole enters to be connected with the anti-phase defeated end of amplifier T2, one end is connected with the positive pole of electric capacity C14, the resistance R17 that the other end is then connected with the inverting input of operational amplifier T2 after potentiometer R18 forms, the inverting input of institute operational amplifier T1 is connected with the normal phase input end of operational amplifier T2, and the base stage of triode VT3 is connected with the negative pole of electric capacity C11, its emitter is also connected with the positive pole of electric capacity C12.As long as people adjust potentiometer R16 and potentiometer R18, then can adjust the frequency filtering of audio frequency processing system, thus better can filter out noise.
Described amplifying circuit is by operational amplifier T3, the electric capacity C9 that positive pole is connected with potentiometer R8, negative pole is connected with the collector electrode of triode VT5 after resistance R9, the electric capacity C10 that negative pole is connected with the negative pole of electric capacity C9, positive pole is connected with the positive pole of operational amplifier T3 after resistance R11, the resistance R10 that one end is connected with the positive pole of electric capacity C10, the other end is connected with the inverting input of operational amplifier T3 after resistance R12, and the resistance R13 be serially connected between the inverting input of operational amplifier T3 and output forms; The tie point ground connection of resistance R10 and resistance R12.
As mentioned above, just well the present invention can be realized.
Claims (6)
1. the adjustable audio frequency processing system of the frequency filtering based on phase shift process, primarily of audio collection module, the frequency selection circuit be connected with audio collection module, the micro-processor interface circuit be connected with frequency selection circuit, the tunable filter circuit be connected with micro-processor interface circuit, and amplifying circuit composition, it is characterized in that: between amplifying circuit and micro-processor interface circuit, be also provided with phase shift treatment circuit, described phase shift treatment circuit is by phase shift chip U1, triode VT4, triode VT5, one end is connected with the VCC+ pin of phase shift chip U1, the resistance R6 that the other end is connected with the IN1 pin of phase shift chip U1, negative pole is connected with the IN1 pin of phase shift chip U1 after resistance R5, the polar capacitor C6 that positive pole is connected with the IN2 pin of phase shift chip U1, positive pole is connected with the NC pin of phase shift chip U1 after resistance R7, the polar capacitor C8 that negative pole is connected with the collector electrode of triode VT4, positive pole is connected with the OUT pin of phase shift chip U1, the polar capacitor C7 of minus earth, one end is connected with the OUT pin of phase shift chip U1, the potentiometer R8 that the other end is connected with amplifying circuit, P pole is connected with the OFF1 pin of phase shift chip U1, the diode D1 that N pole is connected with the base stage of triode VT4, and P pole is connected with the OFF2 pin of phase shift chip U1, the diode D2 that N pole is connected with the emitter of triode VT5 forms, VCC-pin ground connection, the OUT pin of described phase shift chip U1 are connected with the sliding end of potentiometer R8, the emitter of triode VT4 is connected with the base stage of triode VT5, the collector electrode of triode VT5 is connected with amplifying circuit, and the negative pole of electric capacity C6 is connected with micro-processor interface circuit.
2. the adjustable audio frequency processing system of a kind of frequency filtering based on phase shift process according to claim 1, is characterized in that: described frequency selection circuit is by electric capacity C1, and electric capacity C2, electric capacity C3, electric capacity C4, resistance R1, resistance R2 form; The positive pole of electric capacity C1 is connected with its negative pole in turn after resistance R1, electric capacity C3, electric capacity C4, resistance R2, electric capacity C2, electric capacity C1 is connected with an output of audio collection module with the tie point of resistance R1, electric capacity C2 is connected with another output of audio collection module with the tie point of resistance R2, and tie point and the resistance R2 of resistance R1 and electric capacity C3 are all connected with micro-processor interface circuit with the tie point of electric capacity C4.
3. the adjustable audio frequency processing system of a kind of frequency filtering based on phase shift process according to claim 2, it is characterized in that: described micro-processor interface circuit is by triode VT1, triode VT2, the resistance R3 that one end is connected with the collector electrode of triode VT2, the other end is connected with the base stage of triode VT1, the electric capacity C5 that positive pole is connected with the base stage of triode VT1, negative pole is connected with the emitter of triode VT1, and the resistance R4 that one end is connected with the base stage of triode VT2, the other end is connected with the collector electrode of triode VT1 forms; The collector electrode of described triode VT2 is connected with the tie point of electric capacity C3 with resistance R1, its emitter is connected with tunable filter circuit, the emitter of triode VT1 is connected with the negative pole of electric capacity C6, and the negative pole of electric capacity C5 is connected with the tie point of resistance R2 with electric capacity C4.
4. the adjustable audio frequency processing system of a kind of frequency filtering based on phase shift process according to claim 3, it is characterized in that: described tunable filter circuit is by operational amplifier T1, operational amplifier T2, triode VT3, positive pole is connected with the emitter of triode VT2, the electric capacity C11 that negative pole is connected with the output of operational amplifier T1 after potentiometer R16 through resistance R15, positive pole is connected with the normal phase input end of operational amplifier T1, the electric capacity C13 that negative pole is connected with the collector electrode of triode VT3, negative pole is connected with the output of operational amplifier T1, the electric capacity C12 that positive pole is connected with the positive pole of electric capacity C11 after resistance R14, positive pole is connected with the emitter of triode VT3, the electric capacity C14 that negative pole enters to be connected with the anti-phase defeated end of amplifier T2, one end is connected with the positive pole of electric capacity C14, the resistance R17 that the other end is then connected with the inverting input of operational amplifier T2 after potentiometer R18 forms, the inverting input of institute operational amplifier T1 is connected with the normal phase input end of operational amplifier T2, and the base stage of triode VT3 is connected with the negative pole of electric capacity C11, its emitter is also connected with the positive pole of electric capacity C12.
5. the adjustable audio frequency processing system of a kind of frequency filtering based on phase shift process according to claim 4, it is characterized in that: described amplifying circuit is by operational amplifier T3, positive pole is connected with potentiometer R8, the electric capacity C9 that negative pole is connected with the collector electrode of triode VT5 after resistance R9, negative pole is connected with the negative pole of electric capacity C9, the electric capacity C10 that positive pole is connected with the positive pole of operational amplifier T3 after resistance R11, one end is connected with the positive pole of electric capacity C10, the resistance R10 that the other end is connected with the inverting input of operational amplifier T3 after resistance R12, and the resistance R13 be serially connected between the inverting input of operational amplifier T3 and output forms, the tie point ground connection of resistance R10 and resistance R12.
6. the adjustable audio frequency processing system of a kind of frequency filtering based on phase shift process according to any one of Claims 1 to 5, is characterized in that: described phase shift chip U1 is LM741 integrated chip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410691802.1A CN104469612A (en) | 2014-11-26 | 2014-11-26 | Filter frequency adjustable audio processing system based on phase shift processing |
| CN201510321129.7A CN104954945A (en) | 2014-11-26 | 2015-06-07 | Wide pulse trigger type adjustable audio processing system based on phase shifting processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410691802.1A CN104469612A (en) | 2014-11-26 | 2014-11-26 | Filter frequency adjustable audio processing system based on phase shift processing |
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| CN104469612A true CN104469612A (en) | 2015-03-25 |
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| CN201410691802.1A Pending CN104469612A (en) | 2014-11-26 | 2014-11-26 | Filter frequency adjustable audio processing system based on phase shift processing |
| CN201510321129.7A Withdrawn CN104954945A (en) | 2014-11-26 | 2015-06-07 | Wide pulse trigger type adjustable audio processing system based on phase shifting processing |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510321129.7A Withdrawn CN104954945A (en) | 2014-11-26 | 2015-06-07 | Wide pulse trigger type adjustable audio processing system based on phase shifting processing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104954945A (en) * | 2014-11-26 | 2015-09-30 | 成都冠深科技有限公司 | Wide pulse trigger type adjustable audio processing system based on phase shifting processing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104469612A (en) * | 2014-11-26 | 2015-03-25 | 成都创图科技有限公司 | Filter frequency adjustable audio processing system based on phase shift processing |
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2014
- 2014-11-26 CN CN201410691802.1A patent/CN104469612A/en active Pending
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- 2015-06-07 CN CN201510321129.7A patent/CN104954945A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104954945A (en) * | 2014-11-26 | 2015-09-30 | 成都冠深科技有限公司 | Wide pulse trigger type adjustable audio processing system based on phase shifting processing |
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| CN104954945A (en) | 2015-09-30 |
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Application publication date: 20150325 |