CN103475323A - Power amplifier - Google Patents
Power amplifier Download PDFInfo
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- CN103475323A CN103475323A CN201310415015XA CN201310415015A CN103475323A CN 103475323 A CN103475323 A CN 103475323A CN 201310415015X A CN201310415015X A CN 201310415015XA CN 201310415015 A CN201310415015 A CN 201310415015A CN 103475323 A CN103475323 A CN 103475323A
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- triode
- field effect
- effect transistor
- power amplifier
- base stage
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Abstract
The invention discloses a power amplifier. The power amplifier comprises triodes, field effect pipes and a capacitor; the first triode and a first resistor are formed into a signal input stage; a source electrode of the first field effect pipe and a drain electrode of the second field effect pipe are formed into a signal output stage; the second triode and a third resistor are formed into a voltage follower; the fourth triode transfers bidirectional output signals to unidirectional output signals; the fourth triode and the third triode are formed into a complementary piling circuit; the complementary piling circuit drives the field effect pipes to form into an amplifying circuit and provides appropriate DC (Direct Current) offset, so that the signals are avoided form generating intermodulation distortion to influence the input signal power. The power amplifier is large in output power and convenient to use.
Description
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Technical field
The present invention relates to a kind of amplifier, particularly a kind of power amplifier.
Background technology
The effect of power amplifier is that the load loud speaker to audifier provides certain power output.When load is increased to one regularly, the power reduction of output, the signal of output is nonlinear distortion, its inefficiency.
Therefore need a kind of new technical scheme to solve the problems referred to above.
Summary of the invention
Goal of the invention: the problem and shortage existed for above-mentioned prior art, the purpose of this invention is to provide a kind of power amplifier, its power output is large, stable performance.
Technical scheme: the technical solution used in the present invention is a kind of power amplifier, comprise triode, field effect transistor and electric capacity, the first triode and the first resistance form the signal input stage, and its collector electrode is by the second resistance access positive voltage, and its emitter accesses negative voltage; The collector electrode of the first triode is connected with the base stage of the 4th triode, the collector electrode of the 4th triode is connected with the collector electrode of the 3rd triode, its emitter is connected with the emitter of the second triode, and the base stage of the second triode is by the 3rd resistance access positive voltage, and its collector electrode all connects positive voltage; The emitter access negative voltage of the 3rd triode, its base stage is connected with the base stage of the 7th triode by the first electric capacity, the base stage of the 7th triode is connected with the base stage of the 4th triode by the 4th resistance, its emitter is connected with the grid of the first field effect transistor, and by the 5th resistance, with the grid of the second field effect transistor, be connected, the drain electrode of the source electrode of the first field effect transistor and the second field effect transistor forms the signal output stage.
Preferably, the grid of the second field effect transistor connects negative voltage, and its source electrode is by the second electric capacity access negative voltage.
Preferably, the drain electrode of the collector electrode of the 7th triode and the first field effect transistor all accesses positive voltage.
Beneficial effect: the present invention compared with prior art, its advantage is that the second triode and the 3rd resistance form voltage follower, the 4th triode is converted to unidirectional output signal by two-way output signal,, the 4th triode and the 3rd triode form complementation and pile circuit, drive field effect transistor to form and enlarge circuit, and suitable direct current biasing is provided, and anti-stop signal produces intermodulation distortion, affects output signal power, power output of the present invention is large, and application is convenient.
The accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
As shown in Figure 1, triode of the present invention, field effect transistor and electric capacity, the first triode Q1 and the first resistance R 1 form the signal input stage, and its collector electrode is by the second resistance R 2 access positive voltage VCC, its emitter access negative voltage VSS; The collector electrode of described the first triode Q1 is connected with the base stage of the 4th triode Q4, the collector electrode of the 4th triode Q4 is connected with the collector electrode of the 3rd triode Q3, its emitter is connected with the emitter of the second triode Q2, the base stage of the second triode Q2 is by the 3rd resistance R 3 access positive voltage VCC, and its collector electrode all meets positive voltage VCC; The emitter access negative voltage VSS of described the 3rd triode, its base stage is connected with the base stage of the 7th triode Q7 by the first capacitor C 1, the base stage of the 7th triode Q7 is connected with the base stage of the 4th triode Q4 by the 4th resistance R 4, its emitter is connected with the grid of the first field effect transistor Q5, and by the 5th resistance R 5, with the grid of the second field effect transistor Q6, be connected, the drain electrode of the source electrode of the first field effect transistor Q5 and the second field effect transistor Q6 forms the signal output stage.
The grid of the second field effect transistor Q6 meets negative voltage VSS, and its source electrode is by the second capacitor C 2 access negative voltage VSS, and the drain electrode of the collector electrode of the 7th triode Q7 and the first field effect transistor Q5 all accesses positive voltage VCC.
The second triode and the 3rd resistance form voltage follower, the 4th triode is converted to unidirectional output signal by two-way output signal,, the 4th triode and the 3rd triode form complementation and pile circuit, drive field effect transistor to form and enlarge circuit, and provide suitable direct current biasing,, anti-stop signal produces intermodulation distortion, affects output signal power, power output of the present invention is large, and application is convenient.
Claims (3)
1. power amplifier, it is characterized in that: comprise triode, field effect transistor and electric capacity, described the first triode (Q1) forms the signal input stage with the first resistance (R1), and its collector electrode is by the second resistance (R2) access positive voltage (VCC), and its emitter accesses negative voltage (VSS); The collector electrode of described the first triode (Q1) is connected with the base stage of the 4th triode (Q4), the collector electrode of described the 4th triode (Q4) is connected with the collector electrode of the 3rd triode (Q3), its emitter is connected with the emitter of the second triode (Q2), the base stage of described the second triode (Q2) is by the 3rd resistance (R3) access positive voltage (VCC), and its collector electrode all connects positive voltage (VCC); The emitter access negative voltage (VSS) of described the 3rd triode, its base stage is connected with the base stage of the 7th triode (Q7) by the first electric capacity (C1), the base stage of described the 7th triode (Q7) is connected with the base stage of the 4th triode (Q4) by the 4th resistance (R4), its emitter is connected with the grid of the first field effect transistor (Q5), and by the 5th resistance (R5), with the grid of the second field effect transistor (Q6), be connected, the drain electrode of the source electrode of described the first field effect transistor (Q5) and the second field effect transistor (Q6) forms the signal output stage.
2. power amplifier according to claim 1, it is characterized in that: the grid of described the second field effect transistor (Q6) connects negative voltage (VSS), and its source electrode is by the second electric capacity (C2) access negative voltage (VSS).
3. power amplifier according to claim 1, it is characterized in that: the drain electrode of the collector electrode of described the 7th triode (Q7) and the first field effect transistor (Q5) all accesses positive voltage (VCC).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310415015XA CN103475323A (en) | 2013-09-13 | 2013-09-13 | Power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310415015XA CN103475323A (en) | 2013-09-13 | 2013-09-13 | Power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103475323A true CN103475323A (en) | 2013-12-25 |
Family
ID=49800054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310415015XA Pending CN103475323A (en) | 2013-09-13 | 2013-09-13 | Power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103475323A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106936400A (en) * | 2017-05-17 | 2017-07-07 | 安徽久能信息科技有限公司 | A kind of FET and triode mixed signal amplifier |
| CN112906875A (en) * | 2021-04-29 | 2021-06-04 | 常州高凯电子有限公司 | Control system and method for precise gas flow valve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1122970A (en) * | 1995-07-07 | 1996-05-22 | 沙占起 | Power amplifier circuit |
| GB2374220A (en) * | 2001-01-17 | 2002-10-09 | Jeffrey Peter Macaulay | Simple and efficient class A amplifier output stage |
| CN101951227A (en) * | 2010-09-30 | 2011-01-19 | 上海贝岭股份有限公司 | Amplifier circuit |
-
2013
- 2013-09-13 CN CN201310415015XA patent/CN103475323A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1122970A (en) * | 1995-07-07 | 1996-05-22 | 沙占起 | Power amplifier circuit |
| GB2374220A (en) * | 2001-01-17 | 2002-10-09 | Jeffrey Peter Macaulay | Simple and efficient class A amplifier output stage |
| CN101951227A (en) * | 2010-09-30 | 2011-01-19 | 上海贝岭股份有限公司 | Amplifier circuit |
Non-Patent Citations (3)
| Title |
|---|
| R.SORACE ETC: "《Vehicular Technology Conference,2004.VTC2004-Fall》", 29 September 2004 * |
| 刘凡: "《CMOS集成音频功率放大器的研究》", 《万方学位论文全文数据库》 * |
| 廖小玲: "《OTL互补对称功率放大器的性能分析》", 《内蒙古科技与经济》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106936400A (en) * | 2017-05-17 | 2017-07-07 | 安徽久能信息科技有限公司 | A kind of FET and triode mixed signal amplifier |
| CN112906875A (en) * | 2021-04-29 | 2021-06-04 | 常州高凯电子有限公司 | Control system and method for precise gas flow valve |
| CN112906875B (en) * | 2021-04-29 | 2021-07-27 | 常州高凯电子有限公司 | Control system and method for precise gas flow valve |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131225 |