CN101247110B - Push-pull power amplifier without matching amplifier tube - Google Patents
Push-pull power amplifier without matching amplifier tube Download PDFInfo
- Publication number
- CN101247110B CN101247110B CN2007101910659A CN200710191065A CN101247110B CN 101247110 B CN101247110 B CN 101247110B CN 2007101910659 A CN2007101910659 A CN 2007101910659A CN 200710191065 A CN200710191065 A CN 200710191065A CN 101247110 B CN101247110 B CN 101247110B
- Authority
- CN
- China
- Prior art keywords
- power
- tube
- power tube
- connects
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003381 stabilizer Substances 0.000 claims description 17
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Landscapes
- Amplifiers (AREA)
Abstract
A pull-pull power amplifier which needs not to be matched the power tube relates to an amplifier circuit, especially to a low distortion factor and low quiescent dissipation and high-power amplifier which amplifies the signal in the condition of large power and high tension. The power amplifier comprises a first power tube (Q2), a second power tube (Q17) and a feedback network (30). The transmitting electrode of the first power tube (Q2) is connected to the negative electric power source (21). The base electrode is connected to the signal input end (1), and the collecting electrode is connected to the signal output end (18). The transmitting electrode of the second power tube (Q17) is connected to the signal output end (18). The base electrode is connected to the feedback signal output end of the feedback network (30). The collecting electrode is connected to the positive electric power source (20). The feedback signal input end of the feedback network (30) is connected to the signal output end (18), and the feedback signal output end is connected to the base electrode of the second power tube (Q17).
Description
Technical field
The present invention relates to a kind of amplifier circuit, especially for the low distortion of amplifying signal under high-power, high voltage situation, the high power amplifier of low speed paper tape reader static power disspation.
Background technology
Class A and B power amplifier all have a wide range of applications in power amplification circuit.Though wherein the class A power amplifier distortion factor is little, its quiescent dissipation is very big, and efficient is lower; Though and classical class B push-pull power amplifier has the little characteristics of quiescent dissipation, exist the shortcoming of intermodulation distortion, and, constitute the necessary characteristic unanimity of power tube of two type complementations of push-pull configuration in order to guarantee the quality of power output, be commonly called as pairing.In the practice, the power capacity of power tube is big more, and pairing is just difficult more, and this actual use has brought difficulty.And because the restriction of semiconductor fabrication process, the above P type power tube of withstand voltage 400V rarely has the product of practicability, and therefore, the pairing of high-voltage power pipe just is difficult to realize more.
Summary of the invention
Technical problem: the objective of the invention is to propose a kind of push-pull power amplifier of realizing need not the power tube pairing, its intermodulation distortion is minimum, the distortion of signal near the level of class A power amplifier.Its quiescent dissipation is little, and efficient is near classical class B push-pull power amplifier.Of paramount importance is that its push-pull configuration uses two power tubes of same type to realize, has solved the power tube marriage problem dexterously, and is in the application of high power amplifier, significant.
Technical scheme: the push-pull power amplifier that need not the power tube pairing of the present invention is characterized in that this power amplifier comprises first power tube, second power tube, feedback network; The emitter of first power tube connects negative supply, and base stage connects signal input part, and collector electrode connects signal output part; The emitter of second power tube connects signal output part, and base stage connects the feedback signal output of feedback network, and collector electrode connects positive supply; The feedback signal input termination signal output part of feedback network, the base stage of feedback signal output termination second power tube.First power tube, identical two power tubes of the second power tube type of service are as amplifier element, second power tube is connected into the active load of first power tube by feedback network, when a power tube was in big current work state, the electric current in the another pipe was minimum.
Treat that amplifying signal enters circuit from signal input part, signal input part connects the base stage of first power tube, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance and the 3rd voltage-stabiliser tube, the 8th voltage-stabiliser tube take out the current information of output output, feedback signal input as feedback network connects the operational amplifier negative terminal by the 13 resistance; The 9th voltage-stabiliser tube series limiting resistor connects the low tension potential source, and a reference voltage is provided; Potentiometer connects the operational amplifier anode to the reference voltage dividing potential drop by the 12 resistance; The 15 resistance cross-over connection operational amplifier negative terminal and output constitutes negative feedback; Operational amplifier output terminal connects the base stage of second power tube by the 16 current-limiting resistance; The collector electrode of second power tube connects positive supply, and the emitter of first power tube connects negative supply, and amplifying signal takes out between the 4th resistance, the 6th resistance, exports by signal output part.The 3rd steadily pressure pipe, the 8th steadily pressure pipe, the 9th steadily pressure pipe choose should satisfy the 9th steadily the reverse pressure drop of pressure pipe greater than the 3rd steadily one times of the reverse pressure drop of pressure pipe and of pressure pipe, the 8th steadily less than the 3rd pressure pipe, the 8th twice of the reverse pressure drop of pressure pipe steadily steadily.
The present invention is a kind of New Scheme that is applied in the high power amplifier design.Use two identical power tubes of type to constitute push-pull configuration.Wherein a pipe is the active load of another pipe by the feedback network equivalence.In this structure, active load can be regarded the load resistance in the class a audio power amplifier as, and the another pipe is regarded the power tube of class a audio power amplifier as.Therefore the amplification performance of this circuit structure is near class a audio power amplifier, and intermodulation distortion is minimum.
When power tube is opened in the class a audio power amplifier, very big by the electric current of load resistance, so the efficient of class a audio power amplifier is very low, quiescent dissipation is very big.Different with class a audio power amplifier is, the circuit among the present invention has used active load, and when power tube (Q2) when opening, the electric current that passes through in the active load is less.
Classical quiescent push-pull amplifier is made of two power tubes.Current characteristics by power tube is shown in 28.And among the design the current characteristics by power tube shown in 29.Therefore quiescent dissipation is little, and the design is at the push-pull amplifier of the very approaching classics of efficient.
Simultaneously, Jing Dian quiescent push-pull amplifier need be asked type complementation, the characteristic unanimity of two power tubes.When the power capacity of power tube is very big, the pairing of pipe is very difficult, sometimes or even can't realize.The type of two power tubes is identical among the design, and therefore leeway is very big when selecting.
By above-mentioned feedback network, characteristic below two power tubes among the present invention have had when work: when the electric current in first power tube changes from small to large, electric current by second power tube reduces rapidly by the curve of approximate index earlier, after being reduced to a very little value, approximate constant.When the same electric current when second power tube changes from small to large, reduce rapidly by curve near line style by the electric current of first power tube is first, after being reduced to a very little value, approximate constant.
Beneficial effect: the present invention be a kind of distortion factor near class a audio power amplifier, quiescent dissipation is near classical quiescent push-pull amplifier.Its structure still is the form of recommending, but does not need power tube is done pairing, therefore is more convenient for realizing.This invention is especially significant to the design of high power amplifier.
Description of drawings
Fig. 1 is for diverted via type push-pull amplifier schematic diagram.
Fig. 2 is a modified model push-pull amplifier circuit diagram.
Fig. 3 is classical push-pull power amplifier power tube current performance plot.
Fig. 4 is a modified model push-pull amplifier power tube current performance plot.
Embodiment
Explain concrete enforcement with reference to figure.Treat that amplifying signal enters circuit from signal input part 1, signal input part 1 connects the base stage of the first power tube Q2, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and the 3rd voltage-stabiliser tube W3, the 8th voltage-stabiliser tube W8 take out the current information of output 18 outputs, feedback signal input as feedback network 30 connects operational amplifier U14 negative terminal by the 13 resistance R 13; The 9th voltage-stabiliser tube W9 series limiting resistor R11 connects low tension potential source 19, and a reference voltage is provided; Potentiometer R10 connects operational amplifier U14 anode to the reference voltage dividing potential drop by the 12 resistance R 12; The 15 resistance R 15 cross-over connection operational amplifier U14 negative terminal and outputs constitute negative feedback; Operational amplifier U14 output connects the base stage of the second power tube Q17 by the 16 current-limiting resistance R16; The emitter that the collector electrode of the second power tube Q17 meets positive supply 20, the first power tube Q2 connects negative supply 21, and amplifying signal is from taking out between the 4th resistance R 4, the 6th resistance R 6, by signal output part 18 outputs.The 3rd steadily pressure pipe W3, the 8th steadily pressure pipe W8, the 9th steadily pressure pipe W9 choose should satisfy the 9th steadily the reverse pressure drop of pressure pipe W9 greater than the 3rd steadily one times of the reverse pressure drop of pressure pipe W8 and of pressure pipe W3, the 8th steadily less than the 3rd pressure pipe W3, the 8th twice of the reverse pressure drop of pressure pipe W8 steadily steadily.
In the present embodiment, the first power tube Q2, the second power tube Q17 are IGBT pipe 11N120CND, and the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 are used high-power resistance, and all the other resistance use common carbon resistance film.The 3rd steadily pressure pipe W3, the 8th steadily pressure pipe W8 be 1N5257, use its forward characteristic.The 9th steadily pressure pipe W9 be TL431.Operational amplifier 14 is OP27.Positive supply is+1000V that negative supply is-1000V.The relation of two power tube currents can be roughly by curve 29 expressions.Electric current changes to the transition position that remains unchanged rapidly and has a flex point, and the position of this flex point is regulated by potentiometer, and it has determined the distortion performance of amplifier, and the user should do suitably according to concrete applicable cases and regulate.
Claims (1)
1. a push-pull power amplifier that need not the power tube pairing is characterized in that this power amplifier comprises first power tube (Q2), second power tube (Q17), feedback network (30); The emitter of first power tube (Q2) connects negative supply (21), and base stage connects signal input part (1), and collector electrode connects signal output part (18); The emitter of second power tube (Q17) connects signal output part (18), and base stage connects the feedback signal output of feedback network (30), and collector electrode connects positive supply (20); The feedback signal input termination signal output part (18) of feedback network (30), the base stage of feedback signal output termination second power tube (Q17);
First power tube (Q2), identical two power tubes of second power tube (Q17) type of service are as amplifier element, second power tube (Q17) is connected into the active load of first power tube (Q2) by feedback network (30), when a power tube was in big current work state, the electric current in the another pipe was minimum;
Treat that amplifying signal enters circuit from signal input part (1), signal input part (1) connects the base stage of first power tube (Q2), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7) take out the current information of output (18) output with the 3rd voltage-stabiliser tube (W3), the 8th voltage-stabiliser tube (W8), feedback signal input as feedback network (30) connects operational amplifier (U14) negative terminal by the 13 resistance (R13); The 9th voltage-stabiliser tube (W9) series limiting resistor (R11) connects low tension potential source (19), and a reference voltage is provided; Potentiometer (R10) connects operational amplifier (U14) anode to the reference voltage dividing potential drop by the 12 resistance (R12); The 15 resistance (R15) cross-over connection operational amplifier (U14) negative terminal and output constitute negative feedback; Operational amplifier (U14) output connects the base stage of second power tube (Q17) by the 16 current-limiting resistance (R16); The collector electrode of second power tube (Q17) connects positive supply (20), and the emitter of first power tube (Q2) connects negative supply (21), and amplifying signal is exported by signal output part (18) from taking out between the 4th resistance (R4), the 6th resistance (R6);
The reverse pressure drop that the choosing of the 3rd voltage-stabiliser tube (W3), the 8th voltage-stabiliser tube (W8), the 9th voltage-stabiliser tube (W9) should be satisfied the 9th voltage-stabiliser tube (W9) is greater than oppositely one times of pressure drop and less than the reverse twice of pressure drop of the 3rd voltage-stabiliser tube (W3), the 8th voltage-stabiliser tube (W8) of the 3rd voltage-stabiliser tube (W3), the 8th voltage-stabiliser tube (W8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101910659A CN101247110B (en) | 2007-12-07 | 2007-12-07 | Push-pull power amplifier without matching amplifier tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101910659A CN101247110B (en) | 2007-12-07 | 2007-12-07 | Push-pull power amplifier without matching amplifier tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101247110A CN101247110A (en) | 2008-08-20 |
| CN101247110B true CN101247110B (en) | 2010-04-21 |
Family
ID=39947374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101910659A Expired - Fee Related CN101247110B (en) | 2007-12-07 | 2007-12-07 | Push-pull power amplifier without matching amplifier tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101247110B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101771384B (en) * | 2009-12-31 | 2011-11-09 | 成都成电硅海科技股份有限公司 | Non-dead time power amplifier output-stage circuit |
| WO2015000156A1 (en) * | 2013-07-04 | 2015-01-08 | Nokia Corporation | Apparatus and method in apparatus |
| CN103905001B (en) * | 2014-04-01 | 2016-06-22 | 成都信息工程学院 | A kind of amplifier |
| CN113396536A (en) * | 2019-03-26 | 2021-09-14 | 华为技术有限公司 | Push-pull type driving circuit |
| CN113514761B (en) * | 2021-04-22 | 2024-02-27 | 常熟理工学院 | Detection circuit for constant current source output circuit breaking |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4520323A (en) * | 1982-08-20 | 1985-05-28 | Pioneer Electronic Corporation | Emitter follower type SEPP circuit |
| CN2167504Y (en) * | 1992-10-10 | 1994-06-01 | 赵夕保 | High reliable high efficiency and energy-saving electronic ballast for fluorescent lamp |
| CN1913345A (en) * | 2005-08-12 | 2007-02-14 | 西门子公司 | Push-pull amplifier with transformational negative feedback |
-
2007
- 2007-12-07 CN CN2007101910659A patent/CN101247110B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4520323A (en) * | 1982-08-20 | 1985-05-28 | Pioneer Electronic Corporation | Emitter follower type SEPP circuit |
| CN2167504Y (en) * | 1992-10-10 | 1994-06-01 | 赵夕保 | High reliable high efficiency and energy-saving electronic ballast for fluorescent lamp |
| CN1913345A (en) * | 2005-08-12 | 2007-02-14 | 西门子公司 | Push-pull amplifier with transformational negative feedback |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101247110A (en) | 2008-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101247110B (en) | Push-pull power amplifier without matching amplifier tube | |
| US2730576A (en) | Miniaturized transistor amplifier circuit | |
| WO2002047252A2 (en) | Self-boosting circuit for a power amplifier | |
| CN102265504A (en) | Power amplification device | |
| CN115567005B (en) | Power self-adaptive Doherty power amplifier structure and design method | |
| TW201024748A (en) | Current sensing circuit | |
| CN107623493A (en) | A kind of high efficiency high fidelity envelop modulator | |
| US4439742A (en) | Circuit for simulating vacuum tube compression in transistor amplifiers | |
| CN105743444B (en) | Power amplifier | |
| JP2002290158A (en) | Self-oscillating power amplifier | |
| CN214409119U (en) | Current sampling circuit and electronic equipment | |
| CN214507011U (en) | Linear bias circuit and radio frequency power amplifier | |
| CN2708563Y (en) | Class H audio power amplifier | |
| CN207504827U (en) | A kind of super class A bias circuit | |
| Berkhout | Integrated class-D amplifier | |
| CN101677209A (en) | DC/DC converter and current induction circuit thereof | |
| KR100370498B1 (en) | Class d acoustic amplifier applied dual negative feedback | |
| CN202940777U (en) | Power amplification system used for intelligent converting station test system | |
| JP2004179998A (en) | Preamplifier | |
| CN219577012U (en) | Ultrahigh voltage amplifier circuit based on open-loop transformer | |
| CN221531298U (en) | Power supply circuit | |
| CN103023439B (en) | A kind of power amplifying system for intelligent substation test system | |
| CN107171552A (en) | Serial regulating circuit | |
| CN114625044B (en) | Voltage-variable drive control circuit for adjusting parallel current sharing of power tubes | |
| CN103248326B (en) | A kind of output-stage circuit of power amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100421 Termination date: 20131207 |