CN2817213Y - Audio frequency power amplifier - Google Patents
Audio frequency power amplifier Download PDFInfo
- Publication number
- CN2817213Y CN2817213Y CN 200520062818 CN200520062818U CN2817213Y CN 2817213 Y CN2817213 Y CN 2817213Y CN 200520062818 CN200520062818 CN 200520062818 CN 200520062818 U CN200520062818 U CN 200520062818U CN 2817213 Y CN2817213 Y CN 2817213Y
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- circuit
- common emitter
- triode
- symmetrical expression
- frequency power
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Abstract
The utility model discloses an audio frequency power amplifier which is composed of a symmetry type input circuit, a symmetry type composite common emitter voltage amplifying circuit, an inversion type Darlington current amplifying circuit and an OUT output end zero potential automatic regulation circuit. The utility model is characterized in that the symmetry type composite common emitter voltage amplifying circuit adopts two groups of common emitter circuits with different structures for compositely forming a gain stage of a main voltage of an audio frequency power amplification circuit. In addition, the utility model has the advantages of wide band, high fidelity and strong audio frequency analysis.
Description
Technical field
The utility model relates to a kind of power amplifier, particularly a kind of audio-frequency power amplifier.
Background technology
The existing audio-frequency power amplifier in present market, its passband is wide inadequately, and signal is caused distortion.During the playback music, its sound partially secretly hardens, and high pitch is ear-piercing, bass is beaten the heart, makes us producing fidgety sense, and directly hearer's physical and mental health is listened in influence.
Summary of the invention
It is not enough and a kind of audio-frequency power amplifier of function admirable is provided that the utility model purpose is to overcome prior art.Its pass band, the fidelity height; During the playback music, its sound is penetrating bright, and high pitch is clear melodious, and bass weighs and do not thump in mind, and spatial impression is extremely strong.
The purpose of this utility model is achieved in that a kind of audio-frequency power amplifier, by the symmetrical expression input circuit, the compound common emitter voltage amplifier circuit of symmetrical expression, the inverted Darlington current amplification circuit, OUT output zero potential auto-adjusting circuit, temperature-compensation circuit is formed, wherein the compound common emitter voltage amplifier circuit of symmetrical expression is by two groups of compound principal voltage gain stages that constitute audio power amplifying circuit of common emitter circuit that structure is different, promptly one group is by triode BG3, the collector electrode of BG4 is through the common emitter circuit of a voltage-stabiliser tube D1 docking structure, triode BG3, the collector electrode of BG4 is respectively through resistance R 15, R16 and triode BG5, the base stage of BG6 is joined; Another group is by the emitter of triode BG5, the BG6 common emitter circuit through resistance R 19, R20 docking structure, the union end of resistance R 19, R20 connects with power take-off OUT, and the collector electrode of triode BG5, BG6 joins through the input of an electrochemical capacitor and inverted Darlington current amplification circuit respectively; The compound common emitter voltage amplifier circuit of symmetrical expression has two input A and B, two output C connect load with D and one common port E.
The utlity model has following advantage: pass band, the fidelity height is strong to audio frequency parsing power.
Description of drawings
Fig. 1 is an electrical schematic diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done further detailed being described as follows:
As shown in Figure 1: a kind of audio-frequency power amplifier, by symmetrical expression input circuit 1, the compound common emitter voltage amplifier circuit 2 of symmetrical expression, inverted Darlington current amplification circuit 3, OUT output zero potential auto-adjusting circuit 4, temperature-compensation circuit 5 is formed, the compound common emitter voltage amplifier circuit 2 of symmetrical expression is by two groups of compound principal voltage gain stages that constitute audio power amplifying circuit of common emitter circuit that structure is different, promptly one group is by triode BG3, the collector electrode of BG4 is through the common emitter circuit of a voltage-stabiliser tube D1 docking structure, triode BG3, the collector electrode of BG4 is respectively through resistance R 15, R16 and triode BG5, the base stage of BG6 is joined; Another group is by the emitter of triode BG5, the BG6 common emitter circuit through resistance R 19, R20 docking structure, the union end of resistance R 19, R20 connects with power take-off OUT, and the collector electrode of triode BG5, BG6 joins through the input of an electrochemical capacitor and inverted Darlington current amplification circuit 3 respectively; The compound common emitter voltage amplifier circuit 2 of symmetrical expression has two input A and B, two output C connect load with D and one common port E.
Operation principle of the present utility model is such, constitutes the compound common emitter voltage amplifier circuit of symmetrical expression by triode BG3, BG4, BG5, BG6 etc., and signal voltage is amplified to needed amplitude; Constitute the inverted Darlington current amplification circuit by BG7, BG8, BG9, BG10 etc., signal power is amplified to needed amplitude; Constitute OUT output zero potential auto-adjusting circuit by ICD1, ICD2, R01, R02, R03, R04 etc., make the OUT output when static state, remain the zero potential state; Constitute temperature-compensation circuit by BG11, BG12 and negative temperature resistance R TO etc., the quiescent current that makes BG7, BG8, BG9, BG10 is temperature influence not; The collector electrode quiescent current that the resistance value of elder generation's adjusting RT1 makes BG5, BG6 during work is at 1.5 to 2 milliamperes, and the resistance value of regulating RT2, RT3 more respectively makes the collector electrode quiescent current of BG9, BG10 get final product between 15 to 20 milliamperes respectively.In addition, other circuit need not be debugged.The utlity model has following advantage: its pass band, fidelity height; During the playback music, its sound is penetrating bright, and high pitch is clear melodious, and bass weighs and do not thump in mind, and spatial impression is extremely strong, can make the heart rate of listening the hearer reduce about 10%, helps physical and mental health.
Claims (1)
- A kind of audio-frequency power amplifier, by symmetrical expression input circuit (1), the compound common emitter voltage amplifier circuit of symmetrical expression (2), inverted Darlington current amplification circuit (3), OUT output zero potential auto-adjusting circuit (4), temperature-compensation circuit (5) is formed, it is characterized in that: the compound common emitter voltage amplifier circuit of symmetrical expression (2) is by two groups of compound principal voltage gain stages that constitute audio power amplifying circuit of common emitter circuit that structure is different, promptly one group is by triode BG3, the collector electrode of BG4 is through the common emitter circuit of a voltage-stabiliser tube D1 docking structure, triode BG3, the collector electrode of BG4 is respectively through resistance R 15, R16 and triode BG5, the base stage of BG6 is joined; Another group is by the emitter of triode BG5, the BG6 common emitter circuit through resistance R 19, R20 docking structure, the union end of resistance R 19, R20 connects with power take-off OUT, and the collector electrode of triode BG5, BG6 joins through the input of an electrochemical capacitor and inverted Darlington current amplification circuit (3) respectively; The compound common emitter voltage amplifier circuit of symmetrical expression (2) has two input A and B, two output C connect load with D and one common port E.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520062818 CN2817213Y (en) | 2005-08-12 | 2005-08-12 | Audio frequency power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520062818 CN2817213Y (en) | 2005-08-12 | 2005-08-12 | Audio frequency power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2817213Y true CN2817213Y (en) | 2006-09-13 |
Family
ID=36997023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520062818 Expired - Lifetime CN2817213Y (en) | 2005-08-12 | 2005-08-12 | Audio frequency power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2817213Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102806770A (en) * | 2011-06-01 | 2012-12-05 | 株式会社理光 | Image forming apparatus and drive-voltage generating circuit |
| CN104852705A (en) * | 2014-11-19 | 2015-08-19 | 成都冠深科技有限公司 | Frequency-stabilizing filter based on triode common emitter symmetric amplifying circuit |
| CN104852618A (en) * | 2014-11-19 | 2015-08-19 | 成都冠深科技有限公司 | Fast transformation system based on triode common-emitter symmetric amplifying circuit |
| CN104869509A (en) * | 2014-11-19 | 2015-08-26 | 成都冠深科技有限公司 | Phase locking type audio processing system based on triode common-emitter symmetric amplification circuit |
| CN104881649A (en) * | 2014-11-19 | 2015-09-02 | 成都冠深科技有限公司 | Image display system based on triode common emitter symmetrical amplification circuit |
| CN104936095A (en) * | 2014-11-19 | 2015-09-23 | 成都冠深科技有限公司 | Audio processing system based on triode common-emitter symmetric amplification circuit |
| CN109495079A (en) * | 2018-12-29 | 2019-03-19 | 苏州英诺迅科技股份有限公司 | A kind of Darlington circuit compensating high-frequency gain |
-
2005
- 2005-08-12 CN CN 200520062818 patent/CN2817213Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102806770A (en) * | 2011-06-01 | 2012-12-05 | 株式会社理光 | Image forming apparatus and drive-voltage generating circuit |
| US8764143B2 (en) | 2011-06-01 | 2014-07-01 | Ricoh Company, Limited | Image forming apparatus and drive-voltage generating circuit |
| CN102806770B (en) * | 2011-06-01 | 2015-04-08 | 株式会社理光 | Image forming apparatus and drive-voltage generating circuit |
| CN104852705A (en) * | 2014-11-19 | 2015-08-19 | 成都冠深科技有限公司 | Frequency-stabilizing filter based on triode common emitter symmetric amplifying circuit |
| CN104852618A (en) * | 2014-11-19 | 2015-08-19 | 成都冠深科技有限公司 | Fast transformation system based on triode common-emitter symmetric amplifying circuit |
| CN104869509A (en) * | 2014-11-19 | 2015-08-26 | 成都冠深科技有限公司 | Phase locking type audio processing system based on triode common-emitter symmetric amplification circuit |
| CN104881649A (en) * | 2014-11-19 | 2015-09-02 | 成都冠深科技有限公司 | Image display system based on triode common emitter symmetrical amplification circuit |
| CN104936095A (en) * | 2014-11-19 | 2015-09-23 | 成都冠深科技有限公司 | Audio processing system based on triode common-emitter symmetric amplification circuit |
| CN109495079A (en) * | 2018-12-29 | 2019-03-19 | 苏州英诺迅科技股份有限公司 | A kind of Darlington circuit compensating high-frequency gain |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150812 Granted publication date: 20060913 |
|
| EXPY | Termination of patent right or utility model |