CN102142813A - Low-noise high-voltage amplifier - Google Patents
Low-noise high-voltage amplifier Download PDFInfo
- Publication number
- CN102142813A CN102142813A CN 201110085853 CN201110085853A CN102142813A CN 102142813 A CN102142813 A CN 102142813A CN 201110085853 CN201110085853 CN 201110085853 CN 201110085853 A CN201110085853 A CN 201110085853A CN 102142813 A CN102142813 A CN 102142813A
- Authority
- CN
- China
- Prior art keywords
- voltage
- amplifier
- power supply
- output
- low
- 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.)
- Granted
Links
Landscapes
- Amplifiers (AREA)
Abstract
The invention provides a low-noise high-voltage amplifier. The low-noise high-voltage amplifier comprises a GANIT signal adjustor (1), a BIAS adjustment follower (2), an adder (3), a level mover (4), a last-stage power amplifier (5), a low-voltage direct-current stabilized voltage supply (7), a high-voltage direct-current power supply controller (8) and a modulation signal coupler (9), wherein the last-stage power amplifier (5) is formed by connecting two N-channel high-voltage field effect transistors; in the modulation signal coupler (9), a potential device is connected to the in-phase input end of an operational amplifier through a capacitor; and the output end of the operational amplifier is connected to the output end of the last-stage power amplifier (5) in series through a capacitor and a resistor. The output voltage swing of the high-voltage amplifier is +/-350V; the stability reaches +/-0.1V (within 8 hours); and the noise voltage is below 5 mVpp. The low-noise high-voltage amplifier can be used in a high-precision frequency stabilization system and a cavity locked system, and also can be used in other places which require low noise and high voltage.
Description
Technical field
The present invention relates to high-voltage amplifier, specifically is a kind of high-voltage amplifier of low noise high stable output.
Background technology
High-voltage amplifier is a kind of precision electronic device that is used for open loop or closed-loop control system.It exports the high-voltage signal of the function signal stack of adjustable high direct voltage or output offset high pressure and amplification, can be used in the quantum optices field frequency stabilization, lock chamber or as high-voltage DC power supply etc.
In the prior art, the high-voltage amplifier of the GD-1 type of producing as photoelectric technology research institute of the domestic Chinese Academy of Sciences, external U.S.ABurleigh Instrument, inc. produce the high-voltage amplifier of burleigh MODEL PZ-70 type etc.
Above-mentioned high-voltage amplifier comprises GAIN signal damping, BIAS signal damping, two signal poststack input inversion amplifiers, again with the output signal enter drive of inverting amplifier, remove driving amplifier, the output signal input final stage power amplifier of amplifier, high direct voltage that final stage power amplifier is carried or high direct voltage modulated function signal are delivered to the high-voltage amplifier output, linear direct current regulated power supply provides high voltage regulated power supply for amplifier and final stage power amplifier, and high-voltage amplifier is exported high direct voltage modulating function signal under amplification mode.High direct voltage is regulated arbitrarily from 0～1000VDC, and function signal output is regulated arbitrarily from 0～500Vpp.But the about 50mV of their output (HV OUT) noise voltage in some high accuracy frequency stabilization, lock chamber system, because its output noise voltage is too big, and can not satisfy practical requirement.Special when laser during in frequency stabilization or lock chamber modulation signal must cause the signal to noise ratio decline of output signal easily through main high pressure amplifying return circuit.
Summary of the invention
The purpose of this invention is to provide a kind of low noise high-voltage amplifier, the noise of this amplifier out is less than 10mV, and frequency is corresponding more smooth, can be used for also can be used for other and requiring the high-tension occasion of low noise in high accuracy frequency stabilization system and the lock chamber system.
A kind of low noise high-voltage amplifier provided by the invention comprises that GAIN Signal Regulation, BIAS regulate that follower, adder, level are moved, final stage power amplifier, low-voltage direct stabilized voltage power supply, high-voltage DC power supply, high-voltage DC power supply control and modulation signal coupler; After input signal is regulated through GAIN, signal addition in adder with BIAS adjusting follower, send into level and move, send into final stage power amplifier afterwards again, output to load after the modulation signal stack of the high-voltage signal of final stage power amplifier output and the output of modulation signal coupler; High-voltage DC power supply is the final stage power amplifier power supply; The low-voltage direct stabilized voltage power supply is the other parts power supplies; The start-stop of high-voltage DC power supply control control high voltage source; Described final stage power amplifier is connected to form by two N channel high-voltage field effect transistor that are fixed on the radiator, and radiator separates with main circuit board and ground connection, thereby effectively reduces total noise of centrifuge; Between final stage power amplifier output and adder, be connected to feedback resistance, and an electric capacity in parallel with feedback resistance, make the frequency of high-voltage amplifier corresponding more smooth; Described modulation signal coupler is connected to the in-phase input end of an operational amplifier by a potentiometer by an electric capacity, and the output of operational amplifier is linked the output of final stage power amplifier through an electric capacity and resistance string; This design has solved the problem that modulation signal causes the signal to noise ratio of output signal to descend through main amplifying return circuit.
Described level is moved by two high pressure P NP transistor npn npns and is composed in series, and makes the Q2 can operate as normal during for-360V at source voltage, thus guarantee output voltage can reach-350V～+ 350V.
Between the grid of N channel high-voltage field effect transistor Q2 and source electrode and met the voltage stabilizing didoe D2 of a 15-18V, make high-voltage tube GS interpolar not have voltage, thereby guaranteed the trouble free service of this pipe above 18V.
Advantage compared with prior art of the present invention and effect:
The present invention adopts the start-stop of high-voltage DC power supply control control high voltage source, when low-voltage direct stabilized voltage power supply operation irregularity, high voltage source can't start, thereby can protect the front end low-voltage device not damaged by high pressure, also guarantee when switching on and shutting down, not have big voltage fluctuation to occur, thereby demonstrate,proved safe, the reliable and stable work of load;
Final stage power amplifier adopts N channel high-voltage field effect transistor among the present invention, because of the electrical conduction mechanism of field effect transistor is many electronic conductions, thereby effectively reduces total noise of centrifuge; In addition, output N channel high-voltage field effect transistor is as constant-current source work, can not cause the damage of this machine in the output fault that is short-circuited, thereby guarantee that this machine work is more safe and reliable.
The modulation signal coupler adopts operational amplifier U4 to constitute voltage follower among the present invention, and by resistance R 24 and capacitor C 20 modulation signal is coupled to high-voltage output end, has avoided modulation signal to cause the signal to noise ratio of output signal to descend through main amplifying return circuit.
Low noise high-voltage amplifier output voltage swing ± 350V of the present invention, stability reaches ± 0.1V (in 8 hours), noise voltage＜5mV
PpCan be used for also can be used for other and requiring the high-tension occasion of low noise in high accuracy frequency stabilization system and the lock chamber system.
Description of drawings
Fig. 1 is a low noise high-voltage amplifier circuit structure block diagram of the present invention.Among the figure: the 1-GAIN Signal Regulation, 2-BIAS regulates follower, the 3-adder, the 4-level is moved, 5-final stage power amplifier, 6-low-voltage dc power supply, 7-high-voltage DC power supply, the control of 8-high-voltage DC power supply, 9-modulation signal coupler.
Fig. 2 is low noise high-voltage amplifier circuit theory diagrams of the present invention.
Fig. 3 is the circuit theory diagrams of the high-voltage DC power supply control 8 of low noise high-voltage amplifier of the present invention.
Embodiment
Fig. 1, Fig. 2 and shown in Figure 3 be the embodiment of a kind of low noise high-voltage amplifier of the present invention.
Shown in Figure 1 is low noise high-voltage amplifier circuit structure block diagram of the present invention, and it comprises, and GAIN Signal Regulation 1, BIAS regulate that follower 2, adder 3, level move 4, final stage power amplifier 5, low-voltage direct stabilized voltage power supply 6, high-voltage DC power supply 7, high-voltage DC power supply control 8 and modulation signal coupler 9; After input signal regulates 1 through GAIN,, send into level and move 4, send into final stage power amplifier 5 afterwards again, final stage power amplifier 5 output high-voltage signals with signal addition in adder 3 of BIAS adjusting follower 2; High-voltage DC power supply 7 is final stage power amplifier 5 power supplies; Low-voltage direct stabilized voltage power supply 6 is the other parts power supply; The start-stop of high-voltage DC power supply control 8 control high voltage sourcies.
Fig. 2 is low noise high-voltage amplifier circuit theory diagrams of the present invention, comprising: potentiometer S1 constitutes GAIN Signal Regulation 1, potentiometer POT2 and operational amplifier U1 constitute BIAS and regulate follower 2, operational amplifier U2 constitutes adder 3, PNP transistor Q1 and Q3 form level and move 4, and N channel high-voltage field effect transistor Q2 and Q4 form final stage power amplifier 5; 1 end of potentiometer S1 connects input signal, the inverting input of the slip termination adder U2 of S1, the POT2 sliding end inserts the in-phase input end of U1, follow the output offset signal by U1, this offset signal inserts the in-phase input end of U2, adder output signal inserts the emitter that level is moved Q1, and level is moved output signal and inserted the grid of last utmost point power discharging transistor Q2 by the Q3 collector electrode, by the Q4 source electrode through resistance R 22 and R23 output high-voltage signal; Q2 and Q4 are fixed on the radiator, and radiator separates with main circuit board and ground connection.
Between the U2 of final stage power amplifier 5 outputs and adder 3, be connected to feedback resistance R15, and a capacitor C 14 in parallel with R15, make the frequency of high-voltage amplifier corresponding more smooth.
At the G utmost point and the S interpolar of high pressure N channel field-effect pipe Q2 and met the voltage stabilizing didoe D2 of a 15V, make high-voltage tube GS interpolar not have voltage, thereby guaranteed the trouble free service of this pipe above 15V.
Final stage power amplifier pipe Q4 and R16, R22 and D1 have formed constant-current source circuit, and its output current is limited in the scope about 10mA, just need not to add current-limiting protection circuit at output so again.Can not cause the damage of this machine in the output fault that is short-circuited, thereby guarantee that this machine work is more safe and reliable.
Modulation signal coupler 9 is connected to the in-phase input end of U4 by POT by C21, and the output of U4 is connected in series to the output BNC2 of final stage power amplifier 5 through C20 and R24, and this design has avoided modulation signal to cause the signal to noise ratio of output signal to descend through main amplifying return circuit.
Fig. 3 is that the high-voltage DC power supply of low noise high-voltage amplifier of the present invention is controlled 8 circuit theory diagrams, and high-voltage DC power supply 7 is ± and 360V, high-voltage DC power supply control 8 be made up of light-operated two-way silicon OC_TRI_1, OC_TRI_2, operational amplifier J1A and J1B.Low-tension supply ± 12V connects the in-phase input end of J1A and the inverting input of J1B respectively, and the output of J1A and J1B connects the output of the 1 end control high voltage source of light-operated two-way silicon OC_TRI_1, OC_TRI_2 respectively.
The low-voltage dc power supply 6 of low noise high-voltage amplifier of the present invention is ± 12V to be operational amplifier power supplies all in the system.
By Fig. 2, Fig. 3 as can be seen, when low-tension supply ± 12V did not reach rated value, operational amplifier J1A and J1B were output as negative, and light-operated two-way silicon OC_TRI_1 and OC_TRI_2 turn-off, and the output high-voltage power voltage is 0, thus protection low-voltage circuit part; In circuit, used N channel field-effect pipe,, thereby reduced total noise of centrifuge because of the electrical conduction mechanism of field effect transistor is many electronic conductions.
The technical indicator that low noise high-voltage amplifier of the present invention reaches through prototyping testing: output voltage swing ± 350V, stability reaches ± 0.1V (in 8 hours), noise voltage＜5mV
Pp
Claims (3)
1. low noise high-voltage amplifier, it is characterized in that, comprise that GAIN Signal Regulation (1), BIAS regulate follower (2), adder (3), level and move (4), final stage power amplifier (5), low-voltage dc power supply (6), high-voltage DC power supply (7), high-voltage DC power supply control (8) and modulation signal coupler (9); After input signal is regulated (1) through GAIN, signal addition in adder (3) with BIAS adjusting follower (2), send into level and move (4), send into final stage power amplifier (5) afterwards again, the high-voltage signal of final stage power amplifier (5) output and outputs to load after the modulation signal stack of modulation signal coupler (9) output; High-voltage DC power supply (7) is final stage power amplifier (5) power supply; Low-voltage direct stabilized voltage power supply (6) is the other parts power supply; The start-stop of high-voltage DC power supply control (8) control high voltage source; Described final stage power amplifier (5) is connected to form by two N channel high-voltage field effect transistor that are fixed on the radiator, and radiator separates with main circuit board and ground connection; Between final stage power amplifier (5) output and adder (3), be connected to feedback resistance, and an electric capacity in parallel with feedback resistance; Described modulation signal coupler (9) is connected to the in-phase input end of operational amplifier by potentiometer by electric capacity, and the output of operational amplifier is linked the output of final stage power amplifier (5) through electric capacity and resistance string.
2. low noise high-voltage amplifier as claimed in claim 1 is characterized in that, described level is moved (4) and is composed in series by two high pressure P NP transistor npn npns.
3. low noise high-voltage amplifier as claimed in claim 1 is characterized in that, between the grid of N channel high-voltage field effect transistor and source electrode and connect the voltage stabilizing didoe of a 15-18V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110085853 CN102142813B (en) | 2011-03-30 | 2011-03-30 | Low-noise high-voltage amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110085853 CN102142813B (en) | 2011-03-30 | 2011-03-30 | Low-noise high-voltage amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102142813A true CN102142813A (en) | 2011-08-03 |
| CN102142813B CN102142813B (en) | 2013-01-23 |
Family
ID=44410096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110085853 Active CN102142813B (en) | 2011-03-30 | 2011-03-30 | Low-noise high-voltage amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102142813B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386853A (en) * | 2011-08-10 | 2012-03-21 | 清华大学 | Optical fiber isolating multi-tube serial high-voltage amplifier and application method thereof |
| CN112290893A (en) * | 2020-11-07 | 2021-01-29 | 山西大学 | Low-noise broadband high-voltage amplifier |
| CN112637735A (en) * | 2020-12-08 | 2021-04-09 | 珠海全志科技股份有限公司 | Board-level noise elimination circuit of analog signal and audio output equipment |
| CN117096726A (en) * | 2023-08-29 | 2023-11-21 | 山西大学 | Current drive control circuit of semiconductor laser |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2695987Y (en) * | 2003-12-27 | 2005-04-27 | 中国科学院近代物理研究所 | Low noise electric charge sensitive preamplifier |
| CN1665126A (en) * | 2005-03-14 | 2005-09-07 | 山西大学 | High-voltage amplifier |
| CN202034947U (en) * | 2011-03-30 | 2011-11-09 | 山西大学 | Low-noise high-voltage amplifier |
-
2011
- 2011-03-30 CN CN 201110085853 patent/CN102142813B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2695987Y (en) * | 2003-12-27 | 2005-04-27 | 中国科学院近代物理研究所 | Low noise electric charge sensitive preamplifier |
| CN1665126A (en) * | 2005-03-14 | 2005-09-07 | 山西大学 | High-voltage amplifier |
| CN202034947U (en) * | 2011-03-30 | 2011-11-09 | 山西大学 | Low-noise high-voltage amplifier |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386853A (en) * | 2011-08-10 | 2012-03-21 | 清华大学 | Optical fiber isolating multi-tube serial high-voltage amplifier and application method thereof |
| CN112290893A (en) * | 2020-11-07 | 2021-01-29 | 山西大学 | Low-noise broadband high-voltage amplifier |
| CN112290893B (en) * | 2020-11-07 | 2024-05-28 | 山西大学 | Low Noise Broadband High Voltage Amplifier |
| CN112637735A (en) * | 2020-12-08 | 2021-04-09 | 珠海全志科技股份有限公司 | Board-level noise elimination circuit of analog signal and audio output equipment |
| CN117096726A (en) * | 2023-08-29 | 2023-11-21 | 山西大学 | Current drive control circuit of semiconductor laser |
| CN117096726B (en) * | 2023-08-29 | 2024-05-24 | 山西大学 | Current drive control circuit of semiconductor laser |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102142813B (en) | 2013-01-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102419608B (en) | Soft start circuit based on feedback voltage clamping soft start signal | |
| CN107092296B (en) | A kind of fast transient response low-voltage difference adjustor | |
| CN107546981B (en) | A kind of power circuit | |
| CN102142813B (en) | Low-noise high-voltage amplifier | |
| CN101308391B (en) | High precision low pressure difference linear voltage-stabilizing circuit | |
| TWI831857B (en) | Apparatus for regulating a bias-voltage of a switching power supply | |
| CN102064467B (en) | Continuously adjustable drive source device of small-power semiconductor laser | |
| CN105762647A (en) | Power-adjustable semiconductor laser constant current modulation driving circuit | |
| CN103904628A (en) | Charger and over-current protection circuit thereof | |
| CN104377964A (en) | Integrated control circuit on basis of voltage loop feedback and automatic load current sharing | |
| CN110134168B (en) | Engine power compensation system of air automobile | |
| CN202034947U (en) | Low-noise high-voltage amplifier | |
| CN1322659C (en) | Low power semiconductor laser driving power | |
| CN109950790A (en) | A kind of laser control circuit, a kind of laser aid | |
| CN116800078A (en) | Direct-current input slow start circuit capable of controlling slow start time | |
| CN110058633A (en) | A kind of high precision low pressure difference linear constant-current source circuit and feed-back frequency compensation method | |
| CN204290729U (en) | A kind of based on Voltage loop feedback and the integral control circuit of load automatic current equalizing | |
| CN204103885U (en) | Boostrap circuit, inverter and air conditioner | |
| CN202331248U (en) | Power source stabilizing device with one power source and capable of regulating voltage from zero volt | |
| CN205584175U (en) | Linear optoelectronic coupler of high pressure | |
| CN211151511U (en) | Undervoltage protection circuit with temperature compensation | |
| CN104124949A (en) | Bootstrap circuit, inverter and air conditioner | |
| CN209626647U (en) | A kind of laser control circuit, a kind of laser aid | |
| CN1402418A (en) | Method and device for generating driving power supply | |
| CN112290893A (en) | Low-noise broadband high-voltage 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 |