CN104469610A - Filtering-frequency-adjustable high definition audio processing system - Google Patents
Filtering-frequency-adjustable high definition audio processing system Download PDFInfo
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- CN104469610A CN104469610A CN201410664861.XA CN201410664861A CN104469610A CN 104469610 A CN104469610 A CN 104469610A CN 201410664861 A CN201410664861 A CN 201410664861A CN 104469610 A CN104469610 A CN 104469610A
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Abstract
The invention discloses a filtering-frequency-adjustable high definition audio processing system. The filtering-frequency-adjustable high definition audio processing system is mainly formed by an audio acquisition module, a frequency selection circuit connected with the audio acquisition module, a microprocessing circuit connected with the frequency selection circuit and an amplification circuit connected with the microprocessing circuit, and is characterized in that a tunable filter circuit is further arranged at the output end of the microprocessing circuit and is formed by an operational amplifier T1, an operational amplifier T2, a triode VT3, a capacitor C8 and the like, the positive electrode of the capacitor C8 is connected with the microprocessing circuit, and the negative electrode of the capacitor C8 is connected with the output end of the operational amplifier T1 through a resistor R11 and a potentiometer R12. The filtering-frequency-adjustable high definition audio processing system is provided with the tunable filter circuit, so unwanted wave frequency can be filtered out, the audio processing system can be protected against interference of the unwanted wave frequency, and film play quality is improved accordingly. Meanwhile, the filtering frequency of the audio processing system can be adjusted only by adjusting the potentiometer R12 and a potentiometer R14, and therefore noise can be better filtered out.
Description
Technical field
The present invention relates to a kind of electronic system, specifically refer to the high definition audio treatment system that a kind of frequency filtering is adjustable.
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, the high definition audio treatment system that a kind of frequency filtering is adjustable is provided.
The following technical scheme of object of the present invention realizes: the high definition audio treatment system that a kind of frequency filtering is adjustable, 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, and the amplifying circuit to be connected with micro-processor interface circuit forms, and is also provided with tunable filter circuit at the output of micro-processor interface circuit, described tunable filter circuit is by operational amplifier T1, operational amplifier T2, triode VT3, positive pole is connected with micro-processor interface circuit, the electric capacity C8 that negative pole is connected with the output of operational amplifier T1 after potentiometer R12 through resistance R11, positive pole is connected with the normal phase input end of operational amplifier T1, the electric capacity C10 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 C9 that positive pole is connected with the positive pole of electric capacity C8 after resistance R10, positive pole is connected with the emitter of triode VT3, the electric capacity C11 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 C11, the resistance R13 that the other end is then connected with the inverting input of operational amplifier T2 after potentiometer R14 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 C8, its emitter is also connected with the positive pole of electric capacity C9.
Further, 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 the positive pole of electric capacity C8, the emitter of triode VT1 is connected with amplifying circuit, and the negative pole of electric capacity C5 is connected with the tie point of resistance R2 with electric capacity C4.
Described amplifying circuit is by operational amplifier T3, positive pole is connected with the normal phase input end of operational amplifier T3 after resistance R7, the negative pole then electric capacity C7 of ground connection after resistance R5, the electric capacity C6 that positive pole is connected with the emitter of triode VT1, negative pole is connected with the negative pole of electric capacity C7, the resistance R6 that one end is connected with the positive pole of electric capacity C7, the other end is connected with the inverting input of operational amplifier T3 after resistance R8, and the resistance R9 be serially connected between the inverting input of operational amplifier T3 and output forms; The tie point ground connection of resistance R6 and resistance R8.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the present invention is provided with tunable filter circuit, and it can filter out unwanted ripple frequently, avoids audio frequency processing system to be subject to not needing ripple interference frequently, thus improves film play quality.
(2) as long as the present invention's adjustment potentiometer R12 and potentiometer R14, 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 high definition audio treatment system that frequency filtering of the present invention is adjustable, 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, and the amplifying circuit be connected with micro-processor interface circuit forms.In order to object of the present invention can be realized, be also provided with tunable filter circuit at the output of micro-processor interface circuit.
This tunable filter circuit can filter out unwanted ripple frequently, avoids audio frequency processing system to be subject to not needing ripple interference frequently, thus improves film play quality.It is by operational amplifier T1, operational amplifier T2, triode VT3, positive pole is connected with micro-processor interface circuit, the electric capacity C8 that negative pole is connected with the output of operational amplifier T1 after potentiometer R12 through resistance R11, positive pole is connected with the normal phase input end of operational amplifier T1, the electric capacity C10 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 C9 that positive pole is connected with the positive pole of electric capacity C8 after resistance R10, positive pole is connected with the emitter of triode VT3, the electric capacity C11 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 C11, the resistance R13 that the other end is then connected with the inverting input of operational amplifier T2 after potentiometer R14 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 C8, its emitter is also connected with the positive pole of electric capacity C9.As long as people adjust potentiometer R12 and potentiometer R14, then can adjust the frequency filtering of audio frequency processing system, thus better can filter out noise.
Frequency selection circuit can screen signal, picks out useful signal.This 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 the positive pole of electric capacity C8, the emitter of triode VT1 is connected with amplifying circuit, and the negative pole of electric capacity C5 is connected with the tie point of resistance R2 with electric capacity C4.
Finally, signal exports after amplifying circuit amplifies.This amplifying circuit is by operational amplifier T3, positive pole is connected with the normal phase input end of operational amplifier T3 after resistance R7, the negative pole then electric capacity C7 of ground connection after resistance R5, the electric capacity C6 that positive pole is connected with the emitter of triode VT1, negative pole is connected with the negative pole of electric capacity C7, the resistance R6 that one end is connected with the positive pole of electric capacity C7, the other end is connected with the inverting input of operational amplifier T3 after resistance R8, and the resistance R9 be serially connected between the inverting input of operational amplifier T3 and output forms; The tie point ground connection of resistance R6 and resistance R8.
As mentioned above, just well the present invention can be realized.
Claims (4)
1. the high definition audio treatment system that a frequency filtering is adjustable, 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, and the amplifying circuit to be connected with micro-processor interface circuit forms, and it is characterized in that: be also provided with tunable filter circuit at the output of micro-processor interface circuit, described tunable filter circuit is by operational amplifier T1, operational amplifier T2, triode VT3, positive pole is connected with micro-processor interface circuit, the electric capacity C8 that negative pole is connected with the output of operational amplifier T1 after potentiometer R12 through resistance R11, positive pole is connected with the normal phase input end of operational amplifier T1, the electric capacity C10 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 C9 that positive pole is connected with the positive pole of electric capacity C8 after resistance R10, positive pole is connected with the emitter of triode VT3, the electric capacity C11 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 C11, the resistance R13 that the other end is then connected with the inverting input of operational amplifier T2 after potentiometer R14 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 C8, its emitter is also connected with the positive pole of electric capacity C9.
2. the high definition audio treatment system that a kind of frequency filtering according to claim 1 is adjustable, 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 high definition audio treatment system that a kind of frequency filtering according to claim 2 is adjustable, 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 the positive pole of electric capacity C8, the emitter of triode VT1 is connected with amplifying circuit, and the negative pole of electric capacity C5 is connected with the tie point of resistance R2 with electric capacity C4.
4. the high definition audio treatment system that a kind of frequency filtering according to claim 3 is adjustable, it is characterized in that: described amplifying circuit is by operational amplifier T3, positive pole is connected with the normal phase input end of operational amplifier T3 after resistance R7, negative pole is the electric capacity C7 of ground connection after resistance R5 then, positive pole is connected with the emitter of triode VT1, the electric capacity C6 that negative pole is connected with the negative pole of electric capacity C7, one end is connected with the positive pole of electric capacity C7, the resistance R6 that the other end is connected with the inverting input of operational amplifier T3 after resistance R8, and the resistance R9 be serially connected between the inverting input of operational amplifier T3 and output forms, the tie point ground connection of resistance R6 and resistance R8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410664861.XA CN104469610A (en) | 2014-11-18 | 2014-11-18 | Filtering-frequency-adjustable high definition audio processing system |
| CN201510310177.6A CN105049996A (en) | 2014-11-18 | 2015-06-08 | Mirror type voltage-stabilizing oscillation type high-definition audio processing system with adjustable filtering frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410664861.XA CN104469610A (en) | 2014-11-18 | 2014-11-18 | Filtering-frequency-adjustable high definition audio processing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104469610A true CN104469610A (en) | 2015-03-25 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410664861.XA Pending CN104469610A (en) | 2014-11-18 | 2014-11-18 | Filtering-frequency-adjustable high definition audio processing system |
| CN201510310177.6A Withdrawn CN105049996A (en) | 2014-11-18 | 2015-06-08 | Mirror type voltage-stabilizing oscillation type high-definition audio processing system with adjustable filtering frequency |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510310177.6A Withdrawn CN105049996A (en) | 2014-11-18 | 2015-06-08 | Mirror type voltage-stabilizing oscillation type high-definition audio processing system with adjustable filtering frequency |
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| CN (2) | CN104469610A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258957A (en) * | 2015-11-21 | 2016-01-20 | 成都科瑞信科技有限责任公司 | Eddy current retarder test system on the basis of filtering adjustment and emitter-coupled amplification |
-
2014
- 2014-11-18 CN CN201410664861.XA patent/CN104469610A/en active Pending
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2015
- 2015-06-08 CN CN201510310177.6A patent/CN105049996A/en not_active Withdrawn
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| CN105049996A (en) | 2015-11-11 |
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Application publication date: 20150325 |