CN104581523A - Single-end pure A-class audio amplifier circuit - Google Patents
Single-end pure A-class audio amplifier circuit Download PDFInfo
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- CN104581523A CN104581523A CN201310512029.3A CN201310512029A CN104581523A CN 104581523 A CN104581523 A CN 104581523A CN 201310512029 A CN201310512029 A CN 201310512029A CN 104581523 A CN104581523 A CN 104581523A
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- triode
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Abstract
The invention discloses a single-end pure A-class audio amplifier circuit. The single-end pure A-class audio amplifier circuit comprises a first resistor to a sixteenth resistor, a potentiometer, a first capacitor to a fifth capacitor, a first triode to a tenth triode, a signal input terminal and a signal output terminal, wherein the first triode and the second triode constitute a differential amplification circuit; the emitting electrode of the tenth triode is a common grounding terminal to form a common-emitter amplifying circuit; the sixth resistor, the seventh resistor and the third capacitor constitute a bootstrap circuit. The single-end pure A-class audio amplifier circuit is simple and requires less elements, and products manufactured by the circuit are low in price and have high market competitiveness; the heat value is low, and the service life of the elements is prolonged.
Description
Technical field
The present invention relates to a kind of power amplifier, particularly relate to a kind of single-ended pure Class A sound equipment power amplifier.
Background technology
Power amplifier is a kind of circuit commonly used, and the technology of current power supply reaches its maturity, the current stabilization of input, but current sound equipment power amplifier still carries out the process such as filtering to electric current, which results in element materials too much, the cost of product rises, and is unfavorable for market competition.Too much element is piled up on circuit boards, and the heat distributed is also comparatively large, and too high temperature also makes element accelerated ageing, reduces the life-span.
Summary of the invention
Object of the present invention is just to provide a kind of single-ended pure Class A sound equipment power amplifier to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention single-ended pure Class A sound equipment power amplifier, comprise the first resistance ~ the 16 resistance, potentiometer, first electric capacity ~ the 5th electric capacity, first triode ~ the tenth triode, signal input part and signal output part, the first end of described tenth resistance respectively with the first end of described 9th resistance, the first end of described 8th resistance, the first end of described 6th resistance is connected with the first end of described 3rd resistance and as the electrode input end of described power amplifier, second end of described tenth resistance is connected with the emitter of described 5th triode respectively, second end of described 9th resistance is connected with the emitter of described 4th triode, second end of described 8th resistance respectively with the base stage of described 4th triode, the base stage of described 5th triode is connected with the collector electrode of described 3rd triode, second end of described 6th resistance is connected with the first end of described 7th resistance and the first end of described 3rd electric capacity respectively, second end of described 3rd resistance is connected with the emitter of described first triode and the emitter of described second triode respectively, the collector electrode of described 4th triode respectively with the collector electrode of described 5th triode, the emitter of described 3rd triode, second end of described 3rd electric capacity, the first end of described 5th resistance, the first end of described 12 resistance, the first end of described 13 resistance, the first end of described 14 resistance, the first end of described 15 resistance is connected with described signal output part, second end of described 15 resistance is connected with the first end of described 5th electric capacity, second end ground connection of described 5th electric capacity, described 14 resistance second end is connected with the emitter of described 7th triode, second end of described 13 resistance is connected with the emitter of described 6th triode, second end of described 12 resistance respectively with the base stage of described 6th triode, the base stage of described 7th triode is connected with the collector electrode of described 8th triode, the emitter of described 8th triode respectively with the collector electrode of described 6th triode, the collector electrode of described 7th triode, the base stage of described 9th triode is connected with the first end of described 16 resistance, the base stage of described 8th triode is connected with the collector electrode of described 9th triode and the first end of described 11 triode respectively, second end ground connection of described 11 triode, described 7th resistance respectively with the base stage of described 3rd triode, the first end of described 4th electric capacity is connected with the collector electrode of described tenth triode, described 4th electric capacity the second end respectively with the base stage of described tenth triode, the collector electrode of described first triode, the first end of described potentiometer is connected with the sliding end of described potentiometer, second end of described potentiometer respectively with described second transistor collector, the emitter of described tenth triode, the emitter of described 9th triode, second end of described 16 resistance connects and as the negative input of described power amplifier, the base stage of described second triode is connected with the second end of described 5th resistance and the first end of described 4th resistance respectively, second end of described 4th resistance is connected with described second electric capacity first end respectively, second end ground connection of described second electric capacity, the base stage of described first triode is connected with the first end of described first resistance, second end of described first resistance is connected with the first end of described second resistance and the first end of described first electric capacity respectively, second end ground connection of described second electric capacity, second end of described first electric capacity is connected with described signal input part.
Beneficial effect of the present invention is:
The present invention single-ended pure Class A sound equipment power amplifier, simple, the used element of its circuit is few, and the product price produced is cheap, possesses the market competitiveness; Caloric value is low, and the useful life of element gets a promotion.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the present invention single-ended pure Class A sound equipment power amplifier.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, the present invention single-ended pure Class A sound equipment power amplifier, the first end of described tenth resistance R10 respectively with the first end of described 9th resistance R9, the first end of described 8th resistance R8, the first end of described 6th resistance R6 is connected with the first end of described 3rd resistance R3 and as the positive pole of described power amplifier input Ui, second end of the tenth resistance people R10 is connected with the emitter of the 5th triode VT5 respectively, second end of the 9th resistance R9 is connected with the emitter of the 4th triode VT4, second end of the 8th resistance R8 respectively with the base stage of the 4th triode VT4, the base stage of the 5th triode VT5 is connected with the collector electrode of the 3rd triode VT3, second end of the 6th resistance R6 is connected with the first end of the 7th resistance R7 and the first end of the 3rd electric capacity C3 respectively, second end of the 3rd resistance R3 is connected with the emitter of the first triode VT1 and the emitter of the second triode VT2 respectively, the collector electrode of the 4th triode VT4 respectively with the collector electrode of the 5th triode VT5, the emitter of the 3rd triode VT3, second end of the 3rd electric capacity C3, the first end of the 5th resistance R5, the first end of the 12 resistance R12, the first end of the 13 resistance R13, the first end of the 14 resistance R14, the first end of the 15 resistance R15 is connected with signal output part OUTPUT, second end of the 15 resistance R15 is connected with the first end of the 5th electric capacity C5, the second end ground connection of the 5th electric capacity C5, 14 resistance R14 second end is connected with the emitter of the 7th triode VT7, second end of the 13 resistance R13 is connected with the emitter of the 6th triode VT6, second end of the 12 resistance R12 respectively with the base stage of the 6th triode VT6, the base stage of the 7th triode VT7 is connected with the collector electrode of the 8th triode VT8, the emitter of the 8th triode VT8 respectively with the collector electrode of the 6th triode VT6, the collector electrode of the 7th triode VT7, the base stage of the 9th triode VT9 is connected with the first end of the 16 resistance R16, the base stage of the 8th triode VT8 is connected with the collector electrode of the 9th triode VT9 and the first end of the 11 triode VT11 respectively, the second end ground connection of the 11 triode VT11, 7th resistance R7 respectively with the base stage of the 3rd triode VT3, the first end of the 4th electric capacity C4 is connected with the collector electrode of the tenth triode VT10, 4th electric capacity C4 the second end respectively with the base stage of the tenth triode VT10, the collector electrode of the first triode VT1, the first end of potentiometer RP is connected with the sliding end of potentiometer RP, second end of potentiometer RP respectively with the second triode VT2 collector electrode, the emitter of the tenth triode VT10, the emitter of the 9th triode VT9, second end of the 16 resistance R16 connects and as the negative pole of power amplifier input Ui, the base stage of the second triode VT2 is connected with second end of the 5th resistance R5 and the first end of the 4th resistance R4 respectively, second end of the 4th resistance R4 is connected with the second electric capacity C2 first end, the second end ground connection of the second electric capacity C2, the base stage of the first triode VT1 is connected with the first end of the first resistance R1, second end of the first resistance R1 is connected with the first end of the second resistance R2 and the first end of the first electric capacity C1 respectively, the second end ground connection of the second electric capacity C2, second end of the first electric capacity C1 is connected with signal input part INPUT.
Claims (1)
1. a single-ended pure Class A sound equipment power amplifier, it is characterized in that: comprise the first resistance ~ the 16 resistance, potentiometer, first electric capacity ~ the 5th electric capacity, first triode ~ the tenth triode, signal input part and signal output part, the first end of described tenth resistance respectively with the first end of described 9th resistance, the first end of described 8th resistance, the first end of described 6th resistance is connected with the first end of described 3rd resistance and as the electrode input end of described power amplifier, second end of described tenth resistance is connected with the emitter of described 5th triode respectively, second end of described 9th resistance is connected with the emitter of described 4th triode, second end of described 8th resistance respectively with the base stage of described 4th triode, the base stage of described 5th triode is connected with the collector electrode of described 3rd triode, second end of described 6th resistance is connected with the first end of described 7th resistance and the first end of described 3rd electric capacity respectively, second end of described 3rd resistance is connected with the emitter of described first triode and the emitter of described second triode respectively, the collector electrode of described 4th triode respectively with the collector electrode of described 5th triode, the emitter of described 3rd triode, second end of described 3rd electric capacity, the first end of described 5th resistance, the first end of described 12 resistance, the first end of described 13 resistance, the first end of described 14 resistance, the first end of described 15 resistance is connected with described signal output part, second end of described 15 resistance is connected with the first end of described 5th electric capacity, second end ground connection of described 5th electric capacity, described 14 resistance second end is connected with the emitter of described 7th triode, second end of described 13 resistance is connected with the emitter of described 6th triode, second end of described 12 resistance respectively with the base stage of described 6th triode, the base stage of described 7th triode is connected with the collector electrode of described 8th triode, the emitter of described 8th triode respectively with the collector electrode of described 6th triode, the collector electrode of described 7th triode, the base stage of described 9th triode is connected with the first end of described 16 resistance, the base stage of described 8th triode is connected with the collector electrode of described 9th triode and the first end of described 11 triode respectively, second end ground connection of described 11 triode, described 7th resistance respectively with the base stage of described 3rd triode, the first end of described 4th electric capacity is connected with the collector electrode of described tenth triode, described 4th electric capacity the second end respectively with the base stage of described tenth triode, the collector electrode of described first triode, the first end of described potentiometer is connected with the sliding end of described potentiometer, second end of described potentiometer respectively with described second transistor collector, the emitter of described tenth triode, the emitter of described 9th triode, second end of described 16 resistance connects and as the negative input of described power amplifier, the base stage of described second triode is connected with the second end of described 5th resistance and the first end of described 4th resistance respectively, second end of described 4th resistance is connected with described second electric capacity first end respectively, second end ground connection of described second electric capacity, the base stage of described first triode is connected with the first end of described first resistance, second end of described first resistance is connected with the first end of described second resistance and the first end of described first electric capacity respectively, second end ground connection of described second electric capacity, second end of described first electric capacity is connected with described signal input part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310512029.3A CN104581523A (en) | 2013-10-25 | 2013-10-25 | Single-end pure A-class audio amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310512029.3A CN104581523A (en) | 2013-10-25 | 2013-10-25 | Single-end pure A-class audio amplifier circuit |
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| Publication Number | Publication Date |
|---|---|
| CN104581523A true CN104581523A (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310512029.3A Pending CN104581523A (en) | 2013-10-25 | 2013-10-25 | Single-end pure A-class audio amplifier circuit |
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| CN (1) | CN104581523A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2013
- 2013-10-25 CN CN201310512029.3A patent/CN104581523A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Application publication date: 20150429 |
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| WD01 | Invention patent application deemed withdrawn after publication |