CN103684280A - 0-10M broadband amplifier - Google Patents
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- CN103684280A CN103684280A CN201310673331.7A CN201310673331A CN103684280A CN 103684280 A CN103684280 A CN 103684280A CN 201310673331 A CN201310673331 A CN 201310673331A CN 103684280 A CN103684280 A CN 103684280A
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Abstract
本发明属于电子技术领域，具体为一种0-10M宽频带放大器。本发明由第一级双端差分放大电路，第二级共基对称电压放大电路，第三级单管推动电路，第四级推挽电流放大电路组成。该放大器能够线性放大频率范围为0～10MHZ、幅度为0.25V的信号，其输出电压幅度可达到15V，负载能力50欧。本发明不需要切换输入信号就可以实现全频段放大；利用共射－共基－共射电路提高高频增益，和全频带线性度。本发明可用于电子、通信、语音、图像信号的放大，可用作具有强负载能力的信号发生器和具有一定负载能力的电力系统宽带、高频暂态行波信号发生器。
The invention belongs to the field of electronic technology, in particular to a 0-10M broadband amplifier. The invention consists of a first-stage double-terminal differential amplifying circuit, a second-stage common-base symmetrical voltage amplifying circuit, a third-stage single-tube driving circuit, and a fourth-stage push-pull current amplifying circuit. The amplifier can linearly amplify signals with a frequency range of 0-10MHZ and an amplitude of 0.25V. The output voltage amplitude can reach 15V and the load capacity is 50 ohms. The invention can realize full-band amplification without switching input signals; the high-frequency gain and the full-band linearity are improved by using a common-emitter-common-base-common-emitter circuit. The invention can be used for amplifying electronic, communication, voice and image signals, and can be used as a signal generator with strong load capacity and a broadband and high-frequency transient traveling wave signal generator with certain load capacity for power systems.
Description
Technical field
The invention belongs to electronic technology field, be specifically related to a kind of wide-band amplifier.
Background technology
In a lot of electronic experiments and application thereof, need amplification video signal and each full range signal with signal or noise, its frequency spectrum is very wide, from tens hertz to several megahertzes hundreds of megahertz even.Because this amplifier band is very wide, be called for short wide-band amplifier.This amplifier has following features: have enough large gain and output amplitude; There is enough wide passband; There is higher stability; Power is generally little.Conventional amplifier circuit directly adopts operational amplifier, and as AD829, the THS6012 that semiconductor company of Texas Instruments produces etc. that ADI produces, its bandwidth can reach 600M.But actual measured results shows, the type amplifier cannot be accomplished the linearity amplification of 0 ~ 10MHz, even if operational amplifier adds, recommend the also difficult wide-band that reaches 0-10M of broadband amplifiers that pipe forms, its difficult point is that general amplifier is difficult to take into account low frequency and high frequency characteristics.Selectable solution only has the method that adopts frequency-division section to amplify, and evades the full range frequency response of all-band amplifier.
Summary of the invention
The object of the invention is to propose a kind of 0-10M wide-band amplifier that can take into account low frequency and high frequency characteristics.
The 0-10MHz wide-band amplifier of the present invention's design, takes direct coupling system, by first order both-end differential amplifier circuit, and second level cobasis symmetrical voltage amplifying circuit, third level single tube promotes circuit, and fourth stage push-pull current amplifying circuit forms.Particular circuit configurations comprises the differential amplifier circuit for signal input, mirror-image constant flow source circuit for stable operating point, the voltage amplifier circuit of the cobasis symmetrical amplifying circuit amplifying for signal and common collector output, for increasing the final stage voltage follow current amplification circuit etc. of load driving force, can realize the linearity of broadband signal and amplify.Specifically as shown in Figure 1.Wherein:
Described differential amplifier circuit, is connected to form by the first triode Q1 and the second triode Q2 circuit.Input signal is inputted from the differential amplifier circuit of the first triode Q1 and the second triode Q2 formation.In side circuit, the first triode Q1 and the second triode Q2 are strictly matched, because the symmetry of circuit parameter and degenerative introducing have guaranteed stable quiescent point; In the ideal case, the first triode Q1 and the second triode Q2 characteristic and resistance parameter are in full accord, and the temperature drift of the collector voltage of two triodes is cancelled each other, and therefore suppress warm float very capable.In real work, signal is inputted through the first triode Q1 base stage, by the second triode Q2 and ratio the 9th resistance R 9, forms loop, through the voltage signal amplifying, by the collector electrode of the first triode Q1 and the collector electrode of the second triode Q2, is exported.
Described mirror-image constant flow source circuit is by the 9th triode Q9 and the tenth triode Q10, and the 3rd triode Q3 and the 4th triode Q4 form.Wherein, the 9th triode Q9 and the tenth triode Q10 strictly match symmetry, by the first diode D1, provide consistent base current with the tenth triode Q10 for the 9th triode Q9, their base current equates respectively with collector current, so flow through, the electric current of the 19 resistance R 19 and the 18 resistance R 18 equates, the 9th triode Q9 also equates with the collector current of the tenth triode Q10, and the differential amplifier circuit so just forming for the first triode Q1 and the second triode Q2 provides stable bias current; The 3rd triode Q3 and the 4th triode Q4 are equally as mirror-image constant flow source circuit, for the first triode Q1 and the second triode Q2 provide an active electric current load, by regulating the 8th left and right, biasing resistor R8(50K Europe) can make differential amplifier stage circuit working in stable linear amplification region.
The first diode D1 selects 1N4148 pipe, and the first diode D1 positive pole connects 36V positive source, and negative pole connects the 9th triode Q9 base stage.The 19 resistance R 19 1 utmost points connect 36V positive source, and a utmost point connects the tenth triode Q10 emitter.The 18 resistance R 18 1 utmost points connect 36V positive source, and a utmost point connects the 9th triode Q9 emitter.The 8th resistance R 8 one utmost points are extremely connected with the 9th resistance R 9 one, and another utmost point is connected with the 3rd triode Q3 base stage.The 9th triode Q9 base stage is connected with the tenth triode Q10 base stage, and emitter is extremely connected with the 18 resistance R 18 1, and collector electrode is connected with the first triode Q1 collector electrode.The tenth triode Q10 base stage is connected with the 9th triode Q9 base stage, and emitter is extremely connected with the 19 resistance R 19 1, and collector electrode is connected with the 11 triode Q11 emitter.The 3rd triode Q3 base stage is connected with the 4th triode Q4 base stage, and emitter is extremely connected with the 7th resistance R 7 one, and collector electrode is extremely connected with the first resistance R 1 one.The 4th triode Q4 base stage is connected with the 3rd triode Q3 base stage, and emitter is extremely connected with the 17 resistance R 17 1, and collector electrode is connected with the 5th diode D5 negative pole.
Described cobasis symmetrical amplifying circuit is comprised of the 11 triode Q11 and the 12 triode Q12, and the 5th triode Q5 is as its active load, and the 11 resistance R 11 is as the LOCAL FEEDBACK resistance of the 5th triode Q5.Voltage signal by the output of first order differential amplifier circuit both-end is inputted by the emitter of the 11 triode Q11 and the 12 triode Q12, and the voltage signal of amplification is exported through the 12 triode Q12 collector electrode.By the voltage-regulation window circuit of the 8th triode Q8 and the 6th resistance R 6 and the 5th resistance R 5 formations.
The 5th triode Q5 base stage is connected with the 6th triode Q6 emitter, and emitter is extremely connected with the 11 resistance R 11 1, and collector electrode is connected with the 12 triode Q12 collector electrode.The 8th triode Q8 base stage is extremely connected with the 6th resistance R 6 one, and emitter is extremely connected with the 14 resistance R 14 1, and another is extremely connected collector electrode and the 6th resistance R 6.The 6th resistance R 6 the two poles of the earth are connected with collector electrode with the base stage of the 8th triode Q8 respectively.The 5th resistance R 5 the two poles of the earth are connected with emitter with the base stage of the 8th triode Q8 respectively.The 11 triode Q11 base stage is connected with the 12 triode Q12 base stage, and emitter is connected with the tenth triode Q19 collector electrode, and collector electrode is connected with the 7th triode Q7 base stage.The 12 triode Q12 base stage is connected with the 11 triode Q11 base stage, and emitter is connected with the 9th triode Q9 collector electrode, and collector electrode is connected with the 5th triode Q5 collector electrode.
The voltage amplifier circuit of described common collector output consists of the 6th triode Q6, the voltage signal amplifying through upper level cobasis symmetrical amplifying circuit enters the 6th triode Q6 base stage, by the 6th triode Q6 collector electrode, exported, by the final stage bias set circuti being formed by the 8th triode Q8 and the 6th resistance R 6 and the 5th resistance R 5, through the 11 triode Q11 collector electrode, return and form loop.This circuit further amplifies and expands electric current rear drive final stage to pipe by the voltage signal after differential amplifier circuit and grounded base amplification circuit amplification.
Final stage voltage follow current amplification circuit is comprised of the 7th triode Q7 and the 13 triode Q13.Voltage and current signal after the 6th triode Q6 amplifies, the final stage biasing circuit forming through the 8th triode Q8 and the 6th resistance R 6, the 5th resistance R 5 again, be adjusted to the voltage and current signal of positive-negative half-cycle, by the base stage of the 7th triode Q7 and the 13 triode Q13, inputted respectively, emitter by the 7th triode Q7 and the 13 triode Q13 is exported, the electric current amplifying stage that forms voltage follow, makes whole circuit output signal have certain load capacity load is driven.
Feature of the present invention:
Broadband, linearity, load capacity are strong;
Not needing switched input signal just can realize full frequency band amplifies;
Utilize common-emitter common-base-grounded emitter circuit to improve high-frequency gain, and the Whole frequency band linearity.
Range of application of the present invention:
(1) amplification of electronics, communication, voice, picture signal;
(2) there is the signal generator of strong load capacity;
(3) there is electric power system broadband, the high frequency transient travelling wave signal generator of certain load capacity.
Accompanying drawing explanation
Fig. 1 is 0-10M wide-band amplifier circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, further describe the present invention.
Fig. 1 is that enforcement hardware circuit of the present invention is always schemed.In conjunction with actual, be described in detail as follows:
The main part of the present invention comprises:
For the both-end input of signal input, the differential amplifier circuit (being formed by the first triode Q1 and the second triode Q2) of both-end output;
Be used for the mirror-image constant flow source circuit of stable operating point (by the 9th triode Q9 and the tenth triode Q10; The 3rd triode Q3 and the 4th triode Q4 form mirror current source provides suitable bias current for improving its stability as the active load of differential amplifier stage and for the first triode Q1 and the second triode Q2);
Cobasis symmetrical amplifying circuit (be comprised of the 11 triode Q11 and the 12 triode Q12, the 5th triode Q5 is as its active load, and the 11 resistance R 11 is as the LOCAL FEEDBACK resistance of the 5th triode Q5) for voltage amplification;
The 6th triode Q6 is as the voltage amplifier circuit that promotes the output of level common collector; For increasing the final stage current amplification circuit (being formed by the 7th triode Q7 and the 13 triode Q13) of load driving force, as shown in Figure 1.
The auxiliary part of the present invention circuit has: by the second diode D2, the 3rd diode D3 and the first diode D1, provide reference voltage for mirror current source; By the 5th diode D5 and the 4th diode D4, form bias direct current path; By the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 7th resistance R 7, the tenth resistance R the 10, the 11 resistance R the 11, the 17 resistance R the 17, the 18 resistance R the 18, the 19 resistance R 19, formed the local negative feedback resistor of each amplifying stage, the 12 resistance R 12 is large loop negative feedback resistor, and the ratio of adjusting the 9th resistance R 9 and the 12 resistance R 12 can change the closed loop synergy of whole circuit; The 8th resistance R 8 is voltage amplifier stage biasing resistor; The 5th resistance R 5 and the 6th resistance R 6 form final stage biasing adjusting resistance, by adjusting the resistance of the 5th resistance R 5 and the 6th resistance R 6, can make final stage stabilization of operating point be operated in Class A state; The 14 resistance R 14 and the 6th diode D6, the 15 resistance R 15 and the 7th diode D7 provide direct current negative bias to improve its high frequency response for final stage; The 16 resistance R 16 and the 4th capacitor C 4 are adjusted loop for time constant, can change a promotion level amplitude-frequency characteristic, thereby change the frequency response curve of whole circuit; The first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3 are high frequency compensation electric capacity.
The base stage of the first triode Q1 is extremely connected with one of signal source V3, and collector electrode is connected with the collector electrode of the 9th triode Q9, and emitter is extremely connected with one of the first resistance R 1.The base stage of the second triode Q2 is extremely connected with one of the 9th resistance R 9, and collector electrode is connected with the collector electrode of the tenth triode Q10, and emitter is extremely connected with one of the second resistance R 2.The base stage of the 3rd triode Q3 is connected with the base stage of the 4th triode Q4, and collector electrode is extremely connected with one of the first resistance R 1, and emitter is extremely connected with one of the 7th resistance R 7.The base stage of the 4th triode Q4 is connected with the base stage of the 3rd triode Q3, and collector electrode is connected with the negative pole of the 5th diode D5, and emitter is extremely connected with one of the 17 resistance R 17.The base stage of the 5th triode Q5 is connected with the emitter of the 6th triode Q6, and collector electrode is connected with the collector electrode of the 12 triode Q12, and emitter is extremely connected with one of the 11 resistance R 11.The base stage of the 6th triode Q6 is connected with the collector electrode of the 5th triode Q5, and collector electrode is connected with the base stage of the 13 triode Q13, and emitter is connected with the base stage of the 5th triode Q5.The base stage of the 7th triode Q7 is connected with the collector electrode of the 11 triode Q11, and collector electrode is connected with the positive pole of power supply V1, and emitter is extremely connected with one of the 3rd resistance R 3.The 8th triode Q8 base stage is extremely connected with the 6th resistance R 6 one, and emitter is extremely connected with the 14 resistance R 14 1, and another is extremely connected collector electrode and the 6th resistance R 6.The 9th triode Q9 base stage is connected with the tenth triode Q10 base stage, and emitter is extremely connected with the 18 resistance R 18 1, and collector electrode is connected with the first triode Q1 collector electrode.The tenth triode Q10 base stage is connected with the 9th triode Q9 base stage, and emitter is extremely connected with the 19 resistance R 19 1, and collector electrode is connected with the 11 triode Q11 emitter.The 11 triode Q11 base stage is connected with the 12 triode Q12 base stage, and emitter is connected with the tenth triode Q19 collector electrode, and collector electrode is connected with the 7th triode Q7 base stage.The 12 triode Q12 base stage is connected with the 11 triode Q11 base stage, and emitter is connected with the 9th triode Q9 collector electrode, and collector electrode is connected with the 5th triode Q5 collector electrode.
The first diode D1 selects 1N4148 pipe, and the first diode D1 positive pole connects 36V positive source, and negative pole connects the 9th triode Q9 base stage.The second diode D2 selects 1N4148 pipe, and positive pole connects the 3rd triode Q3 base stage, and negative pole connects the 3rd diode cathode.The 3rd diode D3 selects 1N4148 pipe, and positive pole connects the second diode D2 negative pole, and negative pole connects 36v power supply V2 negative pole.The 4th diode D4 selects 1N4148 pipe, and positive pole connects the emitter of the 6th triode Q6, and negative pole connects a utmost point of the tenth resistance R 10.The 5th diode D5 selects 1N4148 pipe, and positive pole connects the first diode D1 negative pole, and negative pole connects the base stage of the 11 triode Q11.The 6th diode D6 selects 1N4148 pipe, and it is anodal that positive pole meets 36V power supply V1, and negative pole connects a utmost point of the 14 resistance R 14.The 7th diode D7 selects 1N4148 pipe, and positive pole connects a utmost point of the 15 resistance R 15, and negative pole connects the negative pole of 36V power supply V2.
First resistance R 1 one utmost points connect the emitter of the first triode Q1, and another utmost point connects the collector electrode of the 3rd triode Q3.Second resistance R 2 one utmost points connect the emitter of the second triode Q2, and another utmost point connects the collector electrode of the 3rd triode Q3.The 3rd resistance R 3 one utmost points connect the emitter of the 7th triode Q7, and another utmost point connects a utmost point of the 13 resistance R 13.The 4th resistance R 4 one utmost points connect the emitter of the 13 triode Q13, and another utmost point connects a utmost point of the 13 resistance R 13.The 5th resistance R 5 the two poles of the earth are connected with emitter with the base stage of the 8th triode Q8 respectively.The 6th resistance R 6 the two poles of the earth are connected with collector electrode with the base stage of the 8th triode Q8 respectively.The 7th resistance R 7 one utmost points connect the emitter of the 3rd triode Q3, and another utmost point connects the negative pole of 36V power supply V2.The 8th resistance R 8 one utmost points are extremely connected with the 9th resistance R 9 one, and another utmost point is connected with the 3rd triode Q3 base stage.The 9th resistance R 9 one utmost points connect the base stage of the second triode Q2, another utmost point ground connection.The tenth resistance R 10 1 utmost points connect the negative pole of the 4th diode D4, and another utmost point connects the negative pole of 36V power supply V2.The 11 resistance R 11 1 utmost points connect the emitter of the 5th triode Q5, and another utmost point connects the negative pole of 36V power supply V2.The 12 resistance R 12 1 utmost points connect the base stage of the second triode Q2, a utmost point of another utmost point the 13 resistance R 13.The 13 resistance R 13 1 utmost point ground connection, another utmost point connects a utmost point of the 12 resistance R 12.The 14 resistance R 14 1 utmost points connect the negative pole of the 6th diode D6, and another utmost point connects the emitter of the 8th triode Q8.One utmost point of the 15 resistance R 15 connects the base stage of the 7th triode Q7, and another utmost point connects the positive pole of the 7th diode D7.One utmost point of the 16 resistance R 16 connects the negative pole of the 4th diode D4, and another utmost point connects a utmost point of the 4th capacitor C 4.One utmost point of the 17 resistance R 17 connects the emitter of the 4th triode Q4, and another utmost point connects the negative pole of 36V power supply V2.The 18 resistance R 18 1 utmost points connect 36V positive source, and a utmost point connects the 9th triode Q9 emitter.The 19 resistance R 19 1 utmost points connect 36V positive source, and a utmost point connects the tenth triode Q10 emitter.
One utmost point of the first capacitor C 1 connects the base stage of the 7th triode Q7, and another utmost point connects the emitter of the 8th triode Q8.One utmost point of the second capacitor C 2 connects a utmost point of the 13 resistance R 13, and another utmost point connects the emitter of the 13 triode Q13.One utmost point of the 3rd capacitor C 3 connects a utmost point of the 13 resistance R 13, and another utmost point connects the emitter of the 7th triode Q7.One utmost point of the 4th capacitor C 4 connects a utmost point of the 16 resistance R 16, and another utmost point connects the negative pole of 36V power supply V2.
The adjusting explanation of circuit major part:
(1) input signal, through the difference see-saw circuit of the first triode Q1 and the second triode Q2 composition, forms simple mirror-image constant flow source circuit by the 9th triode Q9 and the tenth triode Q10 and makes its stable work.The 3rd triode Q3 and the 4th triode Q4 form emitter mirror-image constant flow source, the 7th resistance R 7 and the 17 resistance R 17 can make the 3rd triode Q3 and the 4th triode Q4 working stability, are worth more stablely more greatly, but frequency response is poor, value more small frequency responds, but work is difficult for stablizing.
(2) second level forms grounded base amplification circuit by the 11 triode Q11 and the 12 triode Q12.
(3) third level carries out one-level voltage amplification by the 6th triode Q6, by the 5th triode Q5, forms adjustable constant-flow source, for the 6th triode Q6 provides biasing and quiescent point.
(4) fourth stage forms electric current by the 7th triode Q7 and the 13 triode Q13 and amplifies, by the 11 triode Q11 and the first capacitor C 1, the 5th resistance R 5 and the 6th resistance R 6, provide biasing, form a window voltage, regulate the 6th resistance R 6 can make the 7th triode Q7 and the 13 triode Q13 quiescent point be operated in Class A (base stage and emitter voltage are about 0.65-0.75).
(5) the 15 resistance R 15, the 7th diode D7 and the 14 resistance R 14, the 6th diode D6 are final stage negative bias circuit, can improve because of the final stage power tube frequency response impact on whole circuit not.
Claims (1)
1. a 0-10M wide-band amplifier, is characterized in that taking direct coupling system, comprises first order both-end differential amplifier circuit, second level cobasis symmetrical voltage amplifying circuit, and third level single tube promotes circuit, fourth stage push-pull current amplifying circuit; Circuit structure comprises the differential amplifier circuit for signal input, mirror-image constant flow source circuit for stable operating point, the voltage amplifier circuit of the cobasis symmetrical amplifying circuit amplifying for signal and common collector output, for increasing the compositions such as final stage voltage follow current amplification circuit of load driving force, wherein:
Described differential amplifier circuit, is connected to form by the first triode Q1 and the second triode Q2 circuit; Signal is inputted through the first triode Q1 base stage, and the loop consisting of the second triode Q2 and ratio the 9th resistance R 9, is exported by the collector electrode of the first triode Q1 and the collector electrode of the second triode Q2 through the voltage signal amplifying;
Described mirror-image constant flow source circuit is by the 9th triode Q9 and the tenth triode Q10, and the 3rd triode Q3 and the 4th triode Q4 form; Wherein, the 9th triode Q9 and triode Q10 strictly match symmetry, by the first diode D1, provide consistent base current for the 9th triode Q9 with the tenth triode Q10, and their base current equates respectively with collector current; The 3rd triode Q3 and the 4th triode Q4 be as mirror-image constant flow source circuit, for the first triode Q1 and the second triode Q2 provide an active electric current load, by regulating the 8th biasing resistor R8 to make differential amplifier stage circuit working in stable linear amplification region;
Described cobasis symmetrical amplifying circuit is comprised of the 11 triode Q11 and the 12 triode Q12, and the 5th triode Q5 is as its active load, and the 11 resistance R 11 is as the LOCAL FEEDBACK resistance of the 5th triode Q5; Voltage signal by the output of first order differential amplifier circuit both-end is inputted by the emitter of the 11 triode Q11 and the 12 triode Q12, and the voltage signal of amplification is exported through the 12 triode Q12 collector electrode; By the voltage-regulation window circuit of the 8th triode Q8 and the 6th resistance R 6 and the 5th resistance R 5 formations;
The voltage amplifier circuit of described common collector output consists of the 6th triode Q6, the voltage signal amplifying through upper level cobasis symmetrical amplifying circuit enters the 6th triode Q6 base stage, by the 6th triode Q6 collector electrode, exported, by the final stage bias set circuti being formed by the 8th triode Q8 and the 6th resistance R 6 and the 5th resistance R 5, through the 11 triode Q11 collector electrode, return and form loop; This circuit further amplifies and expands electric current rear drive final stage to pipe by the voltage signal after differential amplifier circuit and grounded base amplification circuit amplification;
Described final stage voltage follow current amplification circuit is comprised of the 7th triode Q7 and the 13 triode Q13; Voltage and current signal after the 6th triode Q6 amplifies, the final stage biasing circuit forming through the 8th triode Q8 and the 6th resistance R 6, the 5th resistance R 5 again, be adjusted to the voltage and current signal of positive-negative half-cycle, by the base stage of the 7th triode Q7 and the 13 triode Q13, inputted respectively, emitter by the 7th triode Q7 and the 13 triode Q13 is exported, and forms the electric current amplifying stage of voltage follow.
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| CN107124143A (en) * | 2017-03-30 | 2017-09-01 | 江苏理工学院 | Two-way high voltage output linearity amplifying circuit |
| CN108336980A (en) * | 2018-02-06 | 2018-07-27 | 深圳先进技术研究院 | a power amplifier |
| WO2019100751A1 (en) * | 2017-11-27 | 2019-05-31 | 上海裕达实业有限公司 | Mass spectrometer amplifier capable of continuously adjusting high frequency micro-signal in multiples |
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| CN106952373A (en) * | 2017-03-23 | 2017-07-14 | 成都零智慧科技有限公司 | A kind of artificial intelligence system recognized based on dynamic image |
| CN106952373B (en) * | 2017-03-23 | 2023-06-23 | 成都零一智慧科技有限公司 | Artificial intelligence system based on dynamic image recognition |
| CN107124143A (en) * | 2017-03-30 | 2017-09-01 | 江苏理工学院 | Two-way high voltage output linearity amplifying circuit |
| CN107124143B (en) * | 2017-03-30 | 2020-08-25 | 江苏理工学院 | Bidirectional high voltage output linear amplifier circuit |
| WO2019100751A1 (en) * | 2017-11-27 | 2019-05-31 | 上海裕达实业有限公司 | Mass spectrometer amplifier capable of continuously adjusting high frequency micro-signal in multiples |
| CN108336980A (en) * | 2018-02-06 | 2018-07-27 | 深圳先进技术研究院 | a power amplifier |
| CN108336980B (en) * | 2018-02-06 | 2021-10-29 | 深圳先进技术研究院 | a power amplifier |
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