CN104936095A - Audio processing system based on triode common-emitter symmetric amplification circuit - Google Patents
Audio processing system based on triode common-emitter symmetric amplification circuit Download PDFInfo
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Abstract
The invention discloses an audio processing system based on a triode common-emitter symmetric amplification circuit. The audio processing system is formed by an audio collector, a low frequency enhancing circuit connected with the audio collector, a frequency selection circuit connected with the low frequency enhancing circuit, a micro-processing circuit and a current source circuit connected with the frequency selection circuit, and an output circuit connected with the micro-processing circuit and the current source circuit. The audio processing system is characterized in that the triode common-emitter symmetric amplification circuit is also connected in series between the low frequency enhancing circuit, the frequency selection circuit, and the output circuit. According to the audio processing system, undistorted amplification processing of audio signals can be realized via the effect of the triode common-emitter symmetric amplification circuit, and the phenomenon of noises due to the turn-up of the sound in a film-watching process is avoided.
Description
Technical field
The present invention relates to a kind of audio frequency processing system, specifically refer to a kind of audio frequency processing system based on triode common emitter symmetrical expression amplifying circuit.
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.The tonequality of high definition can improve the effect of viewing, and therefore, the audio frequency processing system used in home theater then seems particularly important.But, in the viewing process of reality, after people tune up sound, always there will be a lot of noise, affect viewing effect.Therefore, provide a kind of stable audio frequency processing system to solve the problem, seem particularly important.
Summary of the invention
The object of the invention is to overcome the defect easily occurring jitter after current audio treatment system is amplified audio signal, a kind of audio frequency processing system based on triode common emitter symmetrical expression amplifying circuit is provided.
The following technical scheme of object of the present invention realizes: a kind of audio frequency processing system based on triode common emitter symmetrical expression amplifying circuit, it comprises audio collection device, the low frequency intensifier circuit be connected with audio collection device, the frequency selection circuit be connected with low frequency intensifier circuit, the micro-processor interface circuit be connected with frequency selection circuit and current source circuit, the output circuit be simultaneously connected with current source circuit with micro-processor interface circuit, in order to reach object of the present invention, the present invention is at low frequency intensifier circuit, triode common emitter symmetrical expression amplifying circuit is also serially connected with between frequency selection circuit and output circuit.
Further, described triode common emitter symmetrical expression amplifying circuit is by triode VT5, triode VT6, N pole is connected with the base stage of triode VT5 after diode D5, the diode D2 that P pole is then connected with low frequency intensifier circuit, N pole is connected with the emitter of triode VT5 after resistance R19, the diode D6 that P pole is then connected with the N pole of diode D2 after resistance R17, positive pole is connected with the N pole of diode D6, the polar capacitor C10 that negative pole is then connected with the base stage of triode VT5, N pole is connected with the collector electrode of triode VT6 after diode D4, the diode D3 that P pole is then connected with low frequency intensifier circuit, be serially connected in the resistance R18 between the N pole of diode D3 and P pole, be serially connected in the polar capacitor C11 between the collector electrode of triode VT6 and base stage, and one end is connected with the collector electrode of triode VT6, the resistance R20 that the other end is then connected with output circuit forms, the collector electrode of described triode VT5 is connected with the collector electrode of triode VT6, its emitter is then connected with output circuit, grounded emitter, its base stage of described triode VT6 are then connected with the P pole of diode D3, the P pole of described diode D6 is also connected with frequency selection circuit.
Described low frequency intensifier circuit is by resistance R1, and potentiometer R2, resistance R3, resistance R4, resistance R5, potentiometer R6, polar capacitor C1, polar capacitor C2, polar capacitor C3, polar capacitor C4 form, be connected with an output stage of audio collection device and frequency selection circuit while that the positive pole of polar capacitor C4 being after resistance R5, its minus earth, one end of potentiometer R6 is connected with the positive pole of polar capacitor C4, the other end is then connected with the P pole of diode D3, be connected with another output stage of audio collection device and frequency selection circuit while that the positive pole of polar capacitor C1 being after resistance R1, minus earth, one end of potentiometer R2 is connected with the positive pole of polar capacitor C1, other end ground connection, positive pole ground connection after resistance R3 of polar capacitor C2, negative pole is connected with frequency selection circuit, the positive pole of polar capacitor C3 is connected with the P pole of diode D2 after resistance R4, its negative pole is connected with frequency selection circuit.
Described frequency selection circuit is by triode VT1, triode VT2, positive pole is connected with the base stage of triode VT1 after resistance R7, negative pole is then through polar capacitor C5 that polar capacitor C6 is connected with the positive pole of polar capacitor C4 after resistance R5, the polar capacitor C7 that positive pole is connected with the base stage of triode VT1, negative pole is then connected with the negative pole of polar capacitor C6, and the resistance R8 that one end is connected with the base stage of triode VT2, the other end is then connected with the collector electrode of triode VT1 forms; The collector electrode of described triode VT2 is connected with the positive pole of polar capacitor C5, its emitter is then connected with current source circuit, the emitter of triode VT1 is then connected with the negative pole of polar capacitor C6 and micro-processor interface circuit simultaneously, the negative pole of polar capacitor C6 is also connected with the positive pole of polar capacitor C4 after resistance R5, and the positive pole of polar capacitor C5 is then connected with the positive pole of polar capacitor C1 after resistance R1; The negative pole of described polar capacitor C7 is also connected with the P pole of diode D6.
Described current source circuit is by triode VT3, triode VT4, the voltage stabilizing didoe D1 that N pole is connected with the base stage of triode VT3, P pole is connected with the emitter of triode VT3 after resistance R10, one end is connected with the base stage of triode VT3, the resistance R9 of other end ground connection, and the resistance R11 that one end is connected with triode VT4 emitter, the other end is connected with micro-processor interface circuit and output circuit respectively forms; The collector electrode of described triode VT3 is connected with micro-processor interface circuit, the grounded collector of triode VT4, while the P pole of voltage stabilizing didoe D1 is then connected mutually with the emitter of triode VT2 and external power source.
Described micro-processor interface circuit comprises polar capacitor C8, polar capacitor C9, resistance R12, and field effect transistor Q1; The positive pole of polar capacitor C8 is connected with the emitter of triode VT1, its negative pole is connected with the grid of field effect transistor Q1, one end of resistance R12 is connected with the grid of field effect transistor Q1, other end ground connection, the negative pole of polar capacitor C9 is connected with the drain electrode of field effect transistor Q1, its positive pole is then connected with the emitter of triode VT4 after resistance R11, and the source electrode of described field effect transistor Q1 is connected with the collector electrode of triode VT3; The positive pole of described polar capacitor C9 is also connected with output circuit
Described output circuit comprises amplifier P, resistance R13, resistance R14, resistance R15, resistance R16; The positive input of amplifier P is connected with its reverse input end, between the reverse input end that resistance R16 is then serially connected in amplifier P and output through resistance R14 after resistance R13 and resistance R15; Resistance R13 is connected with the positive pole of polar capacitor C9 with the tie point of resistance R14, and resistance R13 is then connected with the emitter of triode VT5 with the tie point of resistance R15; The negative pole of described amplifier P is connected with the collector electrode of triode VT6 after resistance R20.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the present invention is provided with low frequency intensifier circuit, and it can obtain powerful bass and broadening range in wider scope, makes home theater bass effect when film playback better.
(2) the present invention is by the effect of triode common emitter symmetrical expression amplifying circuit, can carrying out distortionless amplification process, avoiding the existing picture revealing noise in viewing process because tuning up sound to audio signal.
(3) structure of the present invention is simple, and can energy efficient.
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 present invention includes audio collection device, the low frequency intensifier circuit be connected with audio collection device, the frequency selection circuit be connected with low frequency intensifier circuit, the micro-processor interface circuit be connected with frequency selection circuit and current source circuit, the output circuit be simultaneously connected with current source circuit with micro-processor interface circuit, in order to reach object of the present invention, the present invention is also serially connected with triode common emitter symmetrical expression amplifying circuit between low frequency intensifier circuit, frequency selection circuit and output circuit.
Wherein, triode common emitter symmetrical expression amplifying circuit is emphasis place of the present invention, and it is by triode VT5, triode VT6, diode D2, diode D3, diode D4, diode D5, diode D6, polar capacitor C10, polar capacitor C11, resistance R17, resistance R18, resistance R19 and resistance R20 form.
During connection, the N pole of diode D2 is connected with the base stage of triode VT5 after diode D5, its P pole is then connected with low frequency intensifier circuit, the N pole of diode D6 is connected with the emitter of triode VT5 after resistance R19, its P pole is then connected with the N pole of diode D2 after resistance R17, the positive pole of polar capacitor C10 is connected with the N pole of diode D6, its negative pole is then connected with the base stage of triode VT5, the N pole of diode D3 is connected with the collector electrode of triode VT6 after diode D4, its P pole is then connected with low frequency intensifier circuit, resistance R18 is serially connected between the N pole of diode D3 and P pole, between the collector electrode that polar capacitor C11 is then serially connected in triode VT6 and base stage, one end of resistance R20 is connected with the collector electrode of triode VT6, its other end is then connected with output circuit.The collector electrode of described triode VT5 is connected with the collector electrode of triode VT6, its emitter is then connected with output circuit.Grounded emitter, its base stage of described triode VT6 are then connected with the P pole of diode D3.The P pole of described diode D6 is also connected with frequency selection circuit.
Wherein, diode D2, resistance R17, diode D3 and resistance R18 form potential-divider network, voltage after dividing potential drop is transported to the base stage of triode VT5 and triode VT6 after diode D5 and diode D4 step-down, the common emitter amplifier be made up of triode VT5 and triode VT6 again amplifies, and then can distortionlessly amplify audio signal thus.This triode VT5 and triode VT6 preferentially can adopt PNP transistor, so then can reach better implementation result.
In addition, this low frequency intensifier circuit is by resistance R1, and potentiometer R2, resistance R3, resistance R4, resistance R5, potentiometer R6, polar capacitor C1, polar capacitor C2, polar capacitor C3 and polar capacitor C4 form.During connection, be connected with an output stage of audio collection device and frequency selection circuit while that the positive pole of polar capacitor C4 being after resistance R5, its minus earth, one end of potentiometer R6 is connected with the positive pole of polar capacitor C4, the other end is then connected with the P pole of diode D3, be connected with another output stage of audio collection device and frequency selection circuit while that the positive pole of polar capacitor C1 being after resistance R1, minus earth, one end of potentiometer R2 is connected with the positive pole of polar capacitor C1, other end ground connection, positive pole ground connection after resistance R3 of polar capacitor C2, negative pole is connected with frequency selection circuit, the positive pole of polar capacitor C3 is connected with the P pole of diode D2 after resistance R4, its negative pole is connected with frequency selection circuit.By the effect of low frequency intensifier circuit, the audio signal after process can obtain powerful bass and broadening range in wider scope, makes home theater bass effect when film playback better.This audio collection device adopts prior art to realize.
Meanwhile, in order to screen audio signal, in system, frequency selection circuit is provided with.It is by triode VT1, triode VT2, positive pole is connected with the base stage of triode VT1 after resistance R7, negative pole is then through polar capacitor C5 that polar capacitor C6 is connected with the positive pole of polar capacitor C4 after resistance R5, the polar capacitor C7 that positive pole is connected with the base stage of triode VT1, negative pole is then connected with the negative pole of polar capacitor C6, and the resistance R8 that one end is connected with the base stage of triode VT2, the other end is then connected with the collector electrode of triode VT1 forms.The collector electrode of described triode VT2 is connected with the positive pole of polar capacitor C5, its emitter is then connected with current source circuit, the emitter of triode VT1 is then connected with the negative pole of polar capacitor C6 and micro-processor interface circuit simultaneously, the negative pole of polar capacitor C6 is also connected with the positive pole of polar capacitor C4 after resistance R5, and the positive pole of polar capacitor C5 is then connected with the positive pole of polar capacitor C1 after resistance R1.The negative pole of described polar capacitor C7 is also connected with the P pole of diode D6.
In order to make sound more clear, Operation system setting has current source circuit.Described current source circuit is by triode VT3, and triode VT4, resistance R9, resistance R10 and voltage stabilizing didoe D1 form.
During connection, the N pole of voltage stabilizing didoe D1 is connected with the base stage of triode VT3, its P pole is connected with the emitter of triode VT3 after resistance R10, one end of resistance R9 is connected with the base stage of triode VT3, its other end ground connection, and one end of resistance R11 is connected with triode VT4 emitter, its other end is connected with micro-processor interface circuit and output circuit respectively.The collector electrode of described triode VT3 is connected with micro-processor interface circuit, the grounded collector of triode VT4.While the P pole of voltage stabilizing didoe D1 is then connected mutually with the emitter of triode VT2 and external power source.
Described micro-processor interface circuit comprises polar capacitor C8, polar capacitor C9, resistance R12, and field effect transistor Q1; The positive pole of polar capacitor C8 is connected with the emitter of triode VT1, its negative pole is connected with the grid of field effect transistor Q1, one end of resistance R12 is connected with the grid of field effect transistor Q1, other end ground connection, the negative pole of polar capacitor C9 is connected with the drain electrode of field effect transistor Q1, its positive pole is then connected with the emitter of triode VT4 after resistance R11, and the source electrode of described field effect transistor Q1 is connected with the collector electrode of triode VT3; The positive pole of described polar capacitor C9 is also connected with output circuit
Described output circuit comprises amplifier P, resistance R13, resistance R14, resistance R15 and resistance R16.The positive input of this amplifier P is connected with its reverse input end, between the reverse input end that resistance R16 is then serially connected in amplifier P and output through resistance R14 after resistance R13 and resistance R15.Resistance R13 is connected with the positive pole of polar capacitor C9 with the tie point of resistance R14, and resistance R13 is then connected with the emitter of triode VT5 with the tie point of resistance R15.The negative pole of described amplifier P is connected with the collector electrode of triode VT6 after resistance R20.
As mentioned above, just well the present invention can be realized.
Claims (5)
1. the audio frequency processing system based on triode common emitter symmetrical expression amplifying circuit, it is by audio collection device, the low frequency intensifier circuit be connected with audio collection device, the frequency selection circuit be connected with low frequency intensifier circuit, the micro-processor interface circuit be connected with frequency selection circuit and current source circuit, and form with the output circuit that micro-processor interface circuit is connected with current source circuit simultaneously, it is characterized in that: between low frequency intensifier circuit, frequency selection circuit and output circuit, be also serially connected with triode common emitter symmetrical expression amplifying circuit, described triode common emitter symmetrical expression amplifying circuit is by triode VT5, triode VT6, N pole is connected with the base stage of triode VT5 after diode D5, the diode D2 that P pole is then connected with low frequency intensifier circuit, N pole is connected with the emitter of triode VT5 after resistance R19, the diode D6 that P pole is then connected with the N pole of diode D2 after resistance R17, positive pole is connected with the N pole of diode D6, the polar capacitor C10 that negative pole is then connected with the base stage of triode VT5, N pole is connected with the collector electrode of triode VT6 after diode D4, the diode D3 that P pole is then connected with low frequency intensifier circuit, be serially connected in the resistance R18 between the N pole of diode D3 and P pole, be serially connected in the polar capacitor C11 between the collector electrode of triode VT6 and base stage, and one end is connected with the collector electrode of triode VT6, the resistance R20 that the other end is then connected with output circuit forms, the collector electrode of described triode VT5 is connected with the collector electrode of triode VT6, its emitter is then connected with output circuit, grounded emitter, its base stage of described triode VT6 are then connected with the P pole of diode D3, the P pole of described diode D6 is also connected with frequency selection circuit.
2. a kind of audio frequency processing system based on triode common emitter symmetrical expression amplifying circuit according to claim 1, it is characterized in that: described low frequency intensifier circuit is by resistance R1, potentiometer R2, resistance R3, resistance R4, resistance R5, potentiometer R6, polar capacitor C1, polar capacitor C2, polar capacitor C3, polar capacitor C4 form, be connected with an output stage of audio collection device and frequency selection circuit while that the positive pole of polar capacitor C4 being after resistance R5, its minus earth, one end of potentiometer R6 is connected with the positive pole of polar capacitor C4, the other end is then connected with the P pole of diode D3, be connected with another output stage of audio collection device and frequency selection circuit while that the positive pole of polar capacitor C1 being after resistance R1, minus earth, one end of potentiometer R2 is connected with the positive pole of polar capacitor C1, other end ground connection, positive pole ground connection after resistance R3 of polar capacitor C2, negative pole is connected with frequency selection circuit, the positive pole of polar capacitor C3 is connected with the P pole of diode D2 after resistance R4, its negative pole is connected with frequency selection circuit.
3. a kind of audio frequency processing system based on triode common emitter symmetrical expression amplifying circuit according to claim 2, it is characterized in that: described frequency selection circuit is by triode VT1, triode VT2, positive pole is connected with the base stage of triode VT1 after resistance R7, negative pole is then through polar capacitor C5 that polar capacitor C6 is connected with the positive pole of polar capacitor C4 after resistance R5, positive pole is connected with the base stage of triode VT1, the polar capacitor C7 that negative pole is then connected with the negative pole of polar capacitor C6, and one end is connected with the base stage of triode VT2, the resistance R8 that the other end is then connected with the collector electrode of triode VT1 forms, the collector electrode of described triode VT2 is connected with the positive pole of polar capacitor C5, its emitter is then connected with current source circuit, the emitter of triode VT1 is then connected with the negative pole of polar capacitor C6 and micro-processor interface circuit simultaneously, the negative pole of polar capacitor C6 is also connected with the positive pole of polar capacitor C4 after resistance R5, and the positive pole of polar capacitor C5 is then connected with the positive pole of polar capacitor C1 after resistance R1, the negative pole of described polar capacitor C7 is also connected with the P pole of diode D6.
4. a kind of audio frequency processing system based on triode common emitter symmetrical expression amplifying circuit according to claim 3, it is characterized in that: described current source circuit is by triode VT3, triode VT4, the voltage stabilizing didoe D1 that N pole is connected with the base stage of triode VT3, P pole is connected with the emitter of triode VT3 after resistance R10, one end is connected with the base stage of triode VT3, the resistance R9 of other end ground connection, and the resistance R11 that one end is connected with triode VT4 emitter, the other end is connected with micro-processor interface circuit and output circuit respectively forms; The collector electrode of described triode VT3 is connected with micro-processor interface circuit, the grounded collector of triode VT4, while the P pole of voltage stabilizing didoe D1 is then connected mutually with the emitter of triode VT2 and external power source.
5. a kind of audio frequency processing system based on triode common emitter symmetrical expression amplifying circuit according to claim 4, is characterized in that: described micro-processor interface circuit comprises polar capacitor C8, polar capacitor C9, resistance R12, and field effect transistor Q1; The positive pole of polar capacitor C8 is connected with the emitter of triode VT1, its negative pole is connected with the grid of field effect transistor Q1, one end of resistance R12 is connected with the grid of field effect transistor Q1, other end ground connection, the negative pole of polar capacitor C9 is connected with the drain electrode of field effect transistor Q1, its positive pole is then connected with the emitter of triode VT4 after resistance R11, and the source electrode of described field effect transistor Q1 is connected with the collector electrode of triode VT3; The positive pole of described polar capacitor C9 is also connected with output circuit.
6. a kind of audio frequency processing system based on triode common emitter symmetrical expression amplifying circuit according to claim 5, is characterized in that: described output circuit comprises amplifier P, resistance R13, resistance R14, resistance R15, resistance R16; The positive input of amplifier P is connected with its reverse input end, between the reverse input end that resistance R16 is then serially connected in amplifier P and output through resistance R14 after resistance R13 and resistance R15; Resistance R13 is connected with the positive pole of polar capacitor C9 with the tie point of resistance R14, and resistance R13 is then connected with the emitter of triode VT5 with the tie point of resistance R15; The negative pole of described amplifier P is connected with the collector electrode of triode VT6 after resistance R20.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510282709.XA CN104936095A (en) | 2014-11-19 | 2015-05-28 | Audio processing system based on triode common-emitter symmetric amplification circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410665145.3A CN104469611A (en) | 2014-11-19 | 2014-11-19 | Audio processing system for widening range |
| CN2014106651453 | 2014-11-19 | ||
| CN201510282709.XA CN104936095A (en) | 2014-11-19 | 2015-05-28 | Audio processing system based on triode common-emitter symmetric amplification circuit |
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| CN104936095A true CN104936095A (en) | 2015-09-23 |
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| CN201410665145.3A Pending CN104469611A (en) | 2014-11-19 | 2014-11-19 | Audio processing system for widening range |
| CN201510282709.XA Withdrawn CN104936095A (en) | 2014-11-19 | 2015-05-28 | Audio processing system based on triode common-emitter symmetric amplification circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107396242A (en) * | 2017-08-08 | 2017-11-24 | 广东长虹电子有限公司 | A kind of audio gain circuit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104469611A (en) * | 2014-11-19 | 2015-03-25 | 成都创图科技有限公司 | Audio processing system for widening range |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2214715Y (en) * | 1994-11-12 | 1995-12-06 | 梁强 | Electron tube positive grid voltage audiofrequency power amplifier |
| CN2257105Y (en) * | 1995-12-18 | 1997-06-25 | 江智新 | Voice frequency power amplifier without capacitor |
| CN2817213Y (en) * | 2005-08-12 | 2006-09-13 | 陈剑荣 | Audio frequency power amplifier |
| CN104469611A (en) * | 2014-11-19 | 2015-03-25 | 成都创图科技有限公司 | Audio processing system for widening range |
-
2014
- 2014-11-19 CN CN201410665145.3A patent/CN104469611A/en active Pending
-
2015
- 2015-05-28 CN CN201510282709.XA patent/CN104936095A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2214715Y (en) * | 1994-11-12 | 1995-12-06 | 梁强 | Electron tube positive grid voltage audiofrequency power amplifier |
| CN2257105Y (en) * | 1995-12-18 | 1997-06-25 | 江智新 | Voice frequency power amplifier without capacitor |
| CN2817213Y (en) * | 2005-08-12 | 2006-09-13 | 陈剑荣 | Audio frequency power amplifier |
| CN104469611A (en) * | 2014-11-19 | 2015-03-25 | 成都创图科技有限公司 | Audio processing system for widening range |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107396242A (en) * | 2017-08-08 | 2017-11-24 | 广东长虹电子有限公司 | A kind of audio gain circuit |
| CN107396242B (en) * | 2017-08-08 | 2024-02-06 | 广东长虹电子有限公司 | Audio gain circuit |
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| CN104469611A (en) | 2015-03-25 |
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