CN105978514B - A kind of discrete power amplifying circuit and signal generator based on amplifier - Google Patents
A kind of discrete power amplifying circuit and signal generator based on amplifier Download PDFInfo
- Publication number
- CN105978514B CN105978514B CN201610280028.4A CN201610280028A CN105978514B CN 105978514 B CN105978514 B CN 105978514B CN 201610280028 A CN201610280028 A CN 201610280028A CN 105978514 B CN105978514 B CN 105978514B
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- Prior art keywords
- circuit
- signal
- push
- pull
- amplifier
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/213—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only in integrated circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/26—Push-pull amplifiers; Phase-splitters therefor
Abstract
The present invention relates to a kind of discrete power amplifying circuit and signal generator based on amplifier.The circuit includes: operational amplifier, first order push-pull circuit, second level push-pull circuit, final stage push-pull circuit, gain setting and feed circuit, constant current source module, biasing circuit and loop compensation circuit.The signal of operational amplifier is reversely amplified by first order push-pull circuit and is carried out signal condition, second level push-pull circuit carries out signal buffer, final stage push-pull circuit carries out ultimate current amplification or power amplification and carries out signal condition, and the indices of output signal is made to meet user demand.And the suitable operating current of first order push-pull circuit is provided by constant current source module, provides push-pull circuits at different levels suitable operating voltage by biasing circuit.Power amplification circuit and signal generator of the invention can be according to application demand, the indices of design power amplifying circuit output signal, to meet customer need.It is provided simultaneously with the characteristics of hardware cost is low, performance is stable, flexible design.
Description
Technical field
The present invention relates to power amplification circuit design field and signal generator design field (the including but not limited to faces Cell
Plate detects signal generator) more particularly to a kind of discrete power amplifying circuit and signal generator based on amplifier.
Background technique
In the manufacturing process of CELL panel, in order to reduce the fraction defective of final finished, need to pass through inspection early period in production
Measurement equipment is detected, to screen out the CELL panel with the bad performance such as bright spot, dim spot, bright line, screen flash be bright.Detection device
A variety of different waveform signals are applied to tested CELL panel, by each pixel circuit charge to can luminance, to reach inspection
Survey purpose.
Current CELL panel detection signal generator, including sequentially connected FPGA (Field-Programmable
Gate Array, field programmable gate array), digital analog converter (DAC, Digital to analog converter)
Group and power amplifier.Wherein FPGA and digital analog converter group are used to realize digital-to-analogue conversion, provide detection waveform, then
Power amplification is carried out by power amplifier, output is to tested CELL panel.
With the continuous progress of science and technology, the size of Cell panel is increasing, and resolution ratio is higher and higher, correspondingly, right
The hardware index request of Cell panel detection signal generator is also higher and higher, such as the slew rate SR of signal, load capacity, output
Range, capacitance load capability.
From the above, it is seen that every hardware index request of Cell panel detection signal generator is all higher and higher, but
It is that the power amplifier (abbreviation power amplifier) of existing IC in the market usually meets SR requirement, but is not able to satisfy output area or band
Loading capability requirement；Or output area even load capacity requirement is met, SR is again not high enough, and being unable to satisfy final application needs
It asks.
In view of this, it is necessary to provide a kind of discrete power amplifying circuit and signal generator based on amplifier, to solve
The above problem.
Summary of the invention
For problem and the shortcomings of the prior art pointed in background technique, the purpose of the present invention is to provide one
Kind of discrete power amplifying circuit and signal generator based on amplifier, can according to application demand, design power amplifying circuit
Indices (slew rate SR, output electric current I, output voltage U range etc.), to meet customer need.
To achieve the goals above, the technical scheme adopted by the invention is that: it is a kind of based on amplifier discrete power amplification
Circuit characterized by comprising
Operational amplifier: simulation small-signal is input to operational amplifier noninverting input, operational amplifier by resistance R1
Reverse input end ground connection, operational amplifier output terminal are connected to first order push-pull circuit；
First order push-pull circuit: for reversely amplifying the output signal progress signal voltage of operational amplifier and carrying out letter
Number conditioning, wherein signal condition includes adjustment signal up and down along waveform and adjustment signal slew rate SR；And export letter
Number to second level push-pull circuit；
Second level push-pull circuit: for the output signal of first order push-pull circuit to be carried out signal buffer；And output signal
To final stage push-pull circuit；
Final stage push-pull circuit: for the output signal progress Current amplifier of second level push-pull circuit or power amplification to be gone forward side by side
Row signal condition, wherein signal condition includes adjustment signal up and down along waveform and adjustment signal slew rate SR；
Gain setting and feed circuit: it is inputted in the same direction for final stage push-pull circuit output signal to be fed back to operational amplifier
Entire power amplification circuit loop stability and voltage gain setting are realized in end；
Constant current source module: output end is connected to first order push-pull circuit, suitable for providing to first order push-pull circuit
Operating current；
Biasing circuit: output end is connected to push-pull circuits at different levels, recommends electricity at different levels for generating suitable bias voltage
Road provides suitable quiescent point.
Further, the power amplification circuit further includes loop compensation circuit, for believing the output of operational amplifier
The reverse input end of operational amplifier number is fed back to, operational amplifier loop stability is maintained.
Further, the power amplification circuit further includes the first low noise power supply module and the second low noise power supply mould
Block, the first low noise power supply module and the second low noise power supply module are respectively that the operational amplifier provides positive negative electricity
Source.
Further, the first low noise power supply module is connect with power amplification circuit power supply "+Vcc ", and described second
Low noise power supply module is connect with power amplification circuit power supply "-Vee ".
Further, the first order push-pull circuit includes the first signal conditioning circuit, recommends electricity for realizing the first order
The signal condition function on road.
Further, the final stage push-pull circuit includes second signal conditioning circuit, for realizing final stage push-pull circuit
Signal condition function.
Further, the power amplification circuit further includes resistance R2, and operational amplifier reverse input end passes through resistance R2
Ground connection.
The present invention also provides a kind of signal generator, including power amplification circuit and it is supplied to the power amplification circuit signal
The input signal generation module in source, which is characterized in that the power amplification circuit is that power as described in the above technical scheme is put
Big circuit.
Compared with prior art, the present invention is with following the utility model has the advantages that the present invention is based on the amplifications of the discrete power of amplifier
Circuit and signal generator can according to application demand, the indices of design power amplifying circuit output signal (slew rate SR,
Export electric current I, output voltage U range etc.), to meet customer need.The correlation properties that amplifier can be made full use of again, make power amplifier
Circuit design is simple with respect to IC design.Meanwhile having the characteristics of hardware cost is low, performance is stable, flexible design.
Detailed description of the invention
Fig. 1 is the general frame of the discrete power amplifying circuit of the invention based on amplifier.
Symbol description in attached drawing: 1-operational amplifier；2-the first low noise power supply module；3-the second low noise acoustic-electric
Source module；4-first order push-pull circuits；5-second level push-pull circuits；6-final stage push-pull circuits；7-gains setting and feedback
Circuit；8-constant current source modules；9-biasing circuits；10-loop compensation circuits；11-the first signal conditioning circuit；12-the second
Signal conditioning circuit；R1, R2-resistance.
Specific embodiment
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but it is of the invention
Content is not limited solely to the following examples.Those skilled in the art can make various modifications or changes to the present invention, these
Within the scope of equivalent form equally claims listed by the application limit.
As shown in Figure 1, a kind of discrete power amplifying circuit based on amplifier of the embodiment of the present invention, comprising: operation amplifier
Device 1, the first low noise power supply module 2, the second low noise power supply module 3, first order push-pull circuit 4(are containing the first signal condition electricity
Road 11), second level push-pull circuit 5, final stage push-pull circuit 6(conditioning circuit containing second signal 12), gain setting and feed circuit
7, constant current source module 8, biasing circuit 9 and loop compensation circuit 10.
Simulation small-signal is input to 1 "+" noninverting input of operational amplifier by resistance R1, and operational amplifier "-" is reversed
Input terminal is grounded by resistance R2, and the first low noise power supply module 2 is connect with power amplification circuit power supply "+Vcc ", the second low noise
Acoustic-electric source module 3 is connect with power amplification circuit power supply "-Vee ".First low noise power supply module 2 and the second low noise power supply mould
Block 3 is respectively that operational amplifier 1 provides positive-negative power.Herein, the first low noise power supply module 2 and the second low noise power supply module
3 inessential elements.Can also being powered using circuit power directly to operational amplifier 1, (circuit power here can be above
VCC and VEE, but nonessential be！The power supply only powered to amplifier).The benefit designed in this way is: using the first low noise
Power module 2 and the second low noise power supply module 3 give the offer positive-negative power of operational amplifier 1, can reduce amplifier power supply noise,
The corresponding noise for reducing output signal.Resistance R2 nor necessary component, it is convenient to omit.
1 output end of operational amplifier outputs signals to first order push-pull circuit 4, carries out signal voltage and reversely amplifies, and leads to
It crosses the first signal conditioning circuit 11 and carries out signal condition, the signal condition includes adjusting output signal up and down along waveform,
And adjust slew rate SR；That is: the function of first order push-pull circuit 4 is to carry out signal voltage reversely to amplify and signal condition,
It can amplify voltage reversal and signal condition is incorporated into a circuit, is also possible to separated voltage reversal amplifying circuit
And first signal conditioning circuit 11.
First order push-pull circuit 4 outputs signals to second level push-pull circuit 5, carries out signal buffer.
Second level push-pull circuit 5 outputs signals to final stage push-pull circuit 6, realizes Current amplifier or power amplification, and pass through
Second signal conditioning circuit 12 carries out signal condition, and the signal condition includes adjusting output signal up and down along waveform, with
And adjust slew rate SR；That is: the function of final stage push-pull circuit 6 is to realize ultimate current amplification or power amplification and signal tune
Reason, Current amplifier or power amplification and signal condition can be incorporated into a circuit, be also possible to separated electric current and put
Big or power amplification circuit and second signal conditioning circuit 12.
It is in the same direction that 6 output signal of final stage push-pull circuit by gain setting and feed circuit 7 feeds back to 1 "+" of operational amplifier
Input terminal.
The output of biasing circuit 9 is connected to push-pull circuits 4,5,6 at different levels, and the output of constant current source module 8 is connected to the first order
Push-pull circuit 4.Biasing circuit 9 generates suitable bias voltage and provides suitable quiescent point, constant current to push-pull circuits at different levels
Source module 8 is supplied to the operating current that first order push-pull circuit is suitable, stable, it is ensured that push-pull circuits at different levels are working properly.I.e.
Level-one push-pull circuit 4 needs biasing circuit 9 to provide operating voltage, it is also desirable to which constant current source module 8 provides stable operating current；But
The second level and final stage push-pull circuit 5,6 only need biasing circuit 9 to provide operating voltage.
The "-" that the output signal of operational amplifier 1 feeds back to operational amplifier 1 through loop compensation circuit 10 reversely inputs
End, it is ensured that operational amplifier 1 will not shake self-excitation, can work normally, and maintain 1 loop stability of operational amplifier.Loop compensation
The output end of circuit 10 is connected to the reverse input end of operational amplifier 1, is grounded simultaneously also by resistance R2.Loop compensation circuit
10 can be omitted in some cases.
The course of work of discrete power amplifying circuit based on amplifier of the invention is:
(1) after circuit powers on, circuit positive-negative power+VCC/-VEE gives the first low noise power supply module 2, the second low noise acoustic-electric
Source module 3, first order push-pull circuit 4, second level push-pull circuit 5,7 constant current of final stage push-pull circuit 6, gain setting and feed circuit
Source module 8, biasing circuit 9 and loop compensation circuit 10 are powered, and operational amplifier 1 is low by the first low noise power supply module 2, second
Noisy power module 3 provides positive-negative power；
(2) biasing circuit 9 is that push-pull circuits 4,5,6 at different levels provide suitable bias voltage, it is ensured that push-pull circuit energy at different levels
It is enough to work normally；Constant current source module 8 is that first order push-pull circuit 4 provides suitable static working current；
(3) simulation small-signal is input to the positive input of operational amplifier 1 by resistance R1, operational amplifier 1 it is anti-
It is grounded to input terminal by resistance R2；The output signal of operational amplifier 1 is supplied to first order push-pull circuit 4, and via loop
Compensation circuit 10 feeds back to the reverse input end of operational amplifier 1, maintains 1 loop stability of operational amplifier；
(4) first order push-pull circuit 4 is reverse amplification circuit, and the output signal of operational amplifier 1 is recommended via the first order
After the reversed amplification of circuit 4 and signal condition, export to second level push-pull circuit 5；
(5) second level push-pull circuit 5 is emitter following circuit, and the output signal of first order push-pull circuit 4 is recommended via the second level
After 5 emitter following of circuit buffering, export to final stage push-pull circuit 6；
(6) final stage push-pull circuit 6 is also emitter following circuit, using large power triode or metal-oxide-semiconductor, realizes ultimate current amplification
Or power amplification, and carry out signal condition；
(7) 6 final output signal of final stage push-pull circuit feeds back to operational amplifier 1 via gain setting and feed circuit 7
Noninverting input, realize entire power amplification circuit loop stability and voltage gain setting.
The present invention also provides a kind of signal generators, including power amplification circuit described in above-described embodiment and are supplied to this
The input signal generation module of power amplification circuit signal source.The signal generator can pass through design according to application demand
The indices (slew rate SR, output electric current I, output voltage U range etc.) of power amplification circuit output signal, make the signal
The output of generator is met customer need.
Power amplification circuit of the present invention can select different amplifiers and other discrete element devices according to customer demand, come
Realize different hardware indexs.For example, to design a high pressure Slew Rate SR, high output voltage range, High-current output ability
Power amplification circuit then needing to provide suitable supply voltage "+Vcc(positive supply) ", "-Vee(negative supply) ", and chooses conjunction
Suitable high speed operation amplifier 1 and discrete component gives push-pull circuits at different levels by adjusting biasing circuit 9 and constant current source module 8
4,5, the 6 suitable quiescent point of setting, then by adjusting loop compensation circuit 10, the first signal conditioning circuit 11, second
Signal conditioning circuit 12, gain setting and feed circuit 7 meet index request to adjust the slew rate SR of final output signal.
Claims (8)
1. a kind of discrete power amplifying circuit based on amplifier characterized by comprising
Operational amplifier (1): simulation small-signal is input to operational amplifier (1) noninverting input, operation amplifier by resistance R1
Device (1) reverse input end ground connection, operational amplifier (1) output end are connected to first order push-pull circuit (4)；
First order push-pull circuit (4): for reversely amplifying and carrying out the output signal progress signal voltage of operational amplifier (1)
Signal condition, wherein signal condition includes adjustment signal up and down along waveform and adjustment signal slew rate SR；And it exports
Signal is to second level push-pull circuit (5)；
Second level push-pull circuit (5): for the output signal of first order push-pull circuit (4) to be carried out signal buffer；And export letter
Number to final stage push-pull circuit (6)；
Final stage push-pull circuit (6): for the output signal of second level push-pull circuit (5) to be carried out Current amplifier or power amplification simultaneously
Signal condition is carried out, wherein signal condition includes adjustment signal up and down along waveform and adjustment signal slew rate SR；
Gain setting and feed circuit (7): same for final stage push-pull circuit (6) output signal to be fed back to operational amplifier (1)
To input terminal, entire power amplification circuit loop stability and voltage gain setting are realized；
Constant current source module (8): output end is connected to first order push-pull circuit (4), for providing conjunction to first order push-pull circuit (4)
Suitable operating current；
Biasing circuit (9): output end is connected to push-pull circuits at different levels (4), (5), (6), for generate suitable bias voltage to
Push-pull circuit (4) at different levels, (5), (6) provide suitable quiescent point.
2. the discrete power amplifying circuit according to claim 1 based on amplifier, which is characterized in that the power amplification electricity
Road further includes loop compensation circuit (10), for the output signal of operational amplifier (1) to be fed back to the anti-of operational amplifier (1)
To input terminal, operational amplifier (1) loop stability is maintained.
3. the discrete power amplifying circuit according to claim 1 based on amplifier, which is characterized in that the power amplification electricity
Road further includes the first low noise power supply module (2) and the second low noise power supply module (3), the first low noise power supply module
(2) and the second low noise power supply module (3) is respectively that the operational amplifier (1) provides positive-negative power.
4. the discrete power amplifying circuit according to claim 3 based on amplifier, which is characterized in that first low noise
Power module (2) is connect with power amplification circuit power supply "+Vcc ", the second low noise power supply module (3) and power amplification electricity
Road power supply "-Vee " connection.
5. the discrete power amplifying circuit according to claim 1 or 2 based on amplifier, which is characterized in that the first order
Push-pull circuit (4) includes the first signal conditioning circuit (11), for realizing the signal condition function of first order push-pull circuit (4).
6. the discrete power amplifying circuit according to claim 1 or 2 based on amplifier, which is characterized in that the final stage pushes away
Drawing circuit (6) includes second signal conditioning circuit (12), for realizing the signal condition function of final stage push-pull circuit (6).
7. the discrete power amplifying circuit according to claim 1 or 2 based on amplifier, which is characterized in that the power is put
Big circuit further includes resistance R2, and operational amplifier (1) reverse input end is grounded by resistance R2.
8. a kind of signal generator is produced including power amplification circuit and the input signal for being supplied to the power amplification circuit signal source
Raw module, which is characterized in that the power amplification circuit is power amplification circuit as claimed in claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610280028.4A CN105978514B (en) | 2016-05-03 | 2016-05-03 | A kind of discrete power amplifying circuit and signal generator based on amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610280028.4A CN105978514B (en) | 2016-05-03 | 2016-05-03 | A kind of discrete power amplifying circuit and signal generator based on amplifier |
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| Publication Number | Publication Date |
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| CN105978514A CN105978514A (en) | 2016-09-28 |
| CN105978514B true CN105978514B (en) | 2019-06-07 |
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| CN201610280028.4A Active CN105978514B (en) | 2016-05-03 | 2016-05-03 | A kind of discrete power amplifying circuit and signal generator based on amplifier |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109406879A (en) * | 2018-12-11 | 2019-03-01 | 上海华宿电气股份有限公司 | Insulation detection device and system |
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2016
- 2016-05-03 CN CN201610280028.4A patent/CN105978514B/en active Active
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| EP0597828A3 (en) * | 1987-12-29 | 1994-08-24 | Sharp Kk | Video signal field for discriminating device, e.g. for a liquid crystal display. |
| CN203981772U (en) * | 2014-08-01 | 2014-12-03 | 武汉精测电子技术股份有限公司 | The marking current pick-up unit of OLED CELL checkout equipment |
| CN104865493A (en) * | 2015-06-11 | 2015-08-26 | 武汉精测电子技术股份有限公司 | CELL panel open-short circuit detection device and method |
| CN104968119A (en) * | 2015-07-14 | 2015-10-07 | 常州顶芯半导体技术有限公司 | LED drive module with detuning compensation, drive circuit and working method |
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Address after: 430070 Hubei City, Hongshan Province, South Lake Road, No. 53, Hongshan Venture Center, building on the 4 floor, No. Applicant after: Wuhan fine test electronics group Limited by Share Ltd Address before: 430070 Hubei City, Hongshan Province, South Lake Road, No. 53, Hongshan Venture Center, building on the 4 floor, No. Applicant before: Wuhan Jingce Electronic Technology Co., Ltd. |
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