CN100342641C - High-voltage amplifier - Google Patents
High-voltage amplifier Download PDFInfo
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- CN100342641C CN100342641C CNB2005100124081A CN200510012408A CN100342641C CN 100342641 C CN100342641 C CN 100342641C CN B2005100124081 A CNB2005100124081 A CN B2005100124081A CN 200510012408 A CN200510012408 A CN 200510012408A CN 100342641 C CN100342641 C CN 100342641C
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Abstract
The present invention relates to a high-voltage amplifier comprising a GAIN signal buffer amplifier (1), a BIAS signal buffer (2), an inverting amplifier (3), a driver (4), an amplifier (5), a last-stage power amplifier (6), and a linear DC voltage stabilizing power supply (7). The present invention is characterized in that BIAS signals output by the signal buffer (2) are input in a preamplification circuit (8); the digital signals processed by preamplification circuit (8) are connected to a relay control circuit (9) to control the electricity obtaining and the electricity losing of a relay (J) of the relay control circuit (9); the switching function of a switching circuit (10) is realized, short circuits and open circuits are switched by the output end of the high-voltage amplifier, and self protection removing of the POWER are switched by the electricity obtaining and the electricity losing of a relay (J). When the amplifier is powered on or powered off, the high-voltage output end does not generate surge voltages or recoil voltages; the stability amplitude of the high-voltage output is controlled within 0.2%. The present invention ensures the safety, the stabilization and the reliability of loads.
Description
Affiliated field
The present invention relates to a kind of high-voltage amplifier, particularly a kind of high-voltage amplifier of high stable output.
Technical background
High-voltage amplifier is a kind of adjustable high direct voltage or high direct voltage modulated function signal exported under amplification mode, is used for the precision electronic device of open loop or closed-loop control system.As be used for laser field, also can be used as high voltage direct current potential source 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.A.Burleigh Instrument, Inc. produce the high-voltage amplifier (referring to product description) of burleigh MODEL PZ-70 type.
This high-voltage amplifier comprises that the GAIN signal damping amplifies, the BIAS signal damping, two signals mix back input inversion amplifier, again with the output signal enter drive of inverting amplifier, remove driving amplifier, the output signal of amplifier is sent into final stage power amplifier, final stage power amplifier gained high direct voltage or high direct voltage modulated function signal are delivered to high-voltage amplifier output (HV OUT), 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 is exported from 0～500V
PpRegulate arbitrarily.
This high-voltage amplifier output dc high voltage, if its load is a piezoelectric ceramic, the direct voltage that adds to the piezoelectric ceramic two ends is up to 1000V, even higher, load current is up to 20mA, if shutdown (outage) suddenly under full load situation, moment will produce a high voltage step pulse and be superimposed upon on the high direct voltage of output on high-voltage output end (HV OUT), make load instantaneous ultra-voltage load, influence the loaded work piece reliability, even the damage load.Shut down even be threaded at BIAS under the situation of 0 (being equivalent to turn off high pressure) high-voltage amplifier, but since the voltage at high-voltage output circuit electric capacity two ends can not suddenly change, so still can produce Kickback voltage.If the BIAS of high-voltage amplifier starts shooting under high voltage output preset condition, produce a surge voltage (high voltage step pulse) in the instantaneous meeting that powers at high-voltage output end, also will jeopardize the safe operation of load.
In addition, this high-voltage amplifier output (HV OUT) exists 10HZ～200HZ, 50mv
Pp～8v
PpLow-frequency disturbance, complete machine output high direct voltage stability≤± 1%.
Summary of the invention
The high-voltage amplifier that the purpose of this invention is to provide a kind of high stability, this amplifier is when the open and close machine, and high-voltage output end does not produce surge voltage and Kickback voltage, and can overcome the interference of low frequency (ripple) to the high-voltage amplifier output.
The invention provides a kind of high-voltage amplifier, comprise that the GAIN signal damping amplifies, the BIAS signal damping, two signals mix back input inversion amplifier, again with the output signal enter drive of inverting amplifier, remove driving amplifier, the output signal of amplifier is sent into final stage power amplifier, final stage power amplifier gained high direct voltage or high direct voltage modulated function signal are delivered to high-voltage amplifier output (HV OUT), linear direct current regulated power supply provides high voltage regulated power supply for amplifier and final stage power amplifier, high-voltage amplifier with the output of high direct voltage modulating function signal, is characterized in that and will import the input port V of pre-amplification circuit through the BIAS signal of signal damping output under amplification mode
S, the digital signal after pre-amplification circuit is handled is through resistance R
4The input b of cut-in relay control circuit, with the relay J in the control relay control circuit get, dead electricity, by the handoff functionality that relay J gets, dead electricity realizes switch switching circuit, finish the switching of high-voltage amplifier output port shorted to earth and open circuit, and the switching of POWER self-insurance and self-insurance releasing.This design makes high-voltage amplifier when the open and close machine, and high-voltage output end does not produce surge voltage and Kickback voltage; Each high-voltage capacitor in parallel of the two ends of four rectifier diodes in the described linear direct current regulated power supply and constitute low-frequency disturbance and suppress circuit, make the following low frequency (ripple) of 200Hz as far as possible little like this, to improve the stability of output high pressure to the interference of high-voltage amplifier output; Described pre-amplification circuit is formed in-phase amplification circuit, R by direct current or low frequency integrated operational amplifier U
2And R
3Be feedback resistance, R
1Be isolation resistance, diode D
1At≤0.7V, the output end voltage of amplifier U is by voltage stabilizing didoe D with the BIAS signal limitations of the in-phase input end of direct current or low frequency integrated operational amplifier U
2Be limited in 2V～3V; Described control relay circuit is that BIAS digital signal by pre-amplification circuit output is through current-limiting resistance R
4Send into the base stage b of the transistor VT in the control relay circuit, between base stage b and ground, meet an anti-ring capacitor C.
Compared with prior art, advantage of the present invention and effect: 1) adopted offset signal pre-amplification circuit, control relay circuit, relay switch contact and high pressure output (HV OUT) circuit in the high-voltage amplifier of the present invention, make high-voltage amplifier when start, high-voltage output end is to be in zero potential (ground connection) start, and high-voltage output end does not produce surge voltage; Earlier high pressure output is reduced to zero (just the BIAS signal being reduced to zero) before the shutdown, the relay J dead electricity, the POWER self-insurance is removed, and could shut down, and at this moment high pressure is output as zero, and high-voltage output end switches to ground simultaneously, has avoided the generation of Kickback voltage.Guaranteed the security reliability of load.2) adopted low-frequency disturbance to suppress circuit in the high-voltage amplifier of the present invention, improved the stability of high-voltage amplifier output, made it only deposit 50Hz and be no more than 100mV
PPThe ripple level, the stability of its high pressure output reaches≤± 0.2%.The technical performance that obviously is better than prior art U.S. PZ-70 high-voltage amplifier.Following table is the comparison of the present invention and U.S. burleighPZ-70 high-voltage amplifier:
Description of drawings
Fig. 1 is a high-voltage amplifier circuit block diagram of the present invention
Fig. 2 is the part basic circuit diagram of high-voltage amplifier of the present invention
Among the figure: the 1:GAIN signal damping amplifies; The 2:BIAS signal damping; 3: inverting amplifier; 4: driver; 5: amplifier; 6: final stage power amplifier; 7: linear direct current regulated power supply; The preposition amplification of 8:BIAS signal; 9: control relay circuit; 10: switch switching circuit; 11: low-frequency disturbance suppresses circuit.
Embodiment
Below in conjunction with accompanying drawing high-voltage amplifier of the present invention is described in further detail.
A kind of high-voltage amplifier as shown in Figure 1 and Figure 2, comprise that the GAIN signal damping amplifies 1, it is with a kind of external function signal, cushion GAIN signal and a kind of analog input voltage that constitutes by reference voltage after the amplification by in-phase amplifier, through cushioning the BIAS signal after 2, be input to inverting amplifier 3 together.Simultaneously, will import the input port V of pre-amplification circuit 8 through the BIAS signal of signal damping 2 outputs
S, the digital signal after pre-amplification circuit 8 is handled is through resistance R
4The input b of cut-in relay control circuit 9, with the relay J in the control relay control circuit 9 get, dead electricity, by the handoff functionality that relay J gets, dead electricity realizes switch switching circuit 10, finish the switching of high-voltage amplifier output port shorted to earth and open circuit, and the switching of POWER self-insurance and self-insurance releasing.Inverting amplifier 3 is made up of integrated transporting discharging and the feedback circuit that is connected on its in-phase end, feedback circuit feeds back to in-phase end with the output voltage of high-voltage amplifier final stage output, GAIN and BIAS signal promptly obtain a kind of direct current modulated function signal and deliver to driver 4 after inverting amplifier is handled, carrying out electric current amplifies, make its driving amplifier 5, direct voltage or direct current modulated function signal are amplified to needed amplitude, amplifier 5 is made of high back-pressure High-power Semiconductor Triode, signal voltage after the amplification outputs to the base stage of final stage power amplifier 6 from its collector electrode, final stage power amplifier 6 constitutes emitter follower by the transistor identical with amplifier 5, the emitter output circuit of final stage power amplifier 6 is formed voltage divider by three precision resistances, obtained direct voltage or direct voltage modulated function signal voltage are delivered to HV OUT port (BNC), another part feeds back to the in-phase input end of inverting amplifier 3, and third part is delivered to the direct voltage that device for digit-displaying shows the output of high-voltage amplifier HV OUT port through display circuit.The low-tension supply of complete machine is provided by linear constant pressure source or Switching Power Supply, and high voltage source offers amplifier 5 and final stage power amplifier 6 by linear direct current regulated power supply 7.Each high-voltage capacitor in parallel at the two ends of four rectifier diodes of linear direct current regulated power supply 7 and constituting.Make the following low frequency (ripple) of 200Hz as far as possible little like this, to improve the stability of output high pressure to the interference of high-voltage amplifier output.High-voltage amplifier is exported high direct voltage modulating function signal under amplification mode.
Wherein: described pre-amplification circuit 8 is formed in-phase amplification circuit, R by direct current or low frequency integrated operational amplifier U
2And R
3Be feedback resistance, R
1Be isolation resistance, diode D
1At≤0.7V, the output end voltage of amplifier U is by voltage stabilizing didoe D with the BIAS signal limitations of the in-phase input end of direct current or low frequency integrated operational amplifier U
2Be limited in 2V～3V.
Described control relay circuit 9 is that BIAS digital signal by pre-amplification circuit 8 output is through current-limiting resistance R
4Send into the base stage b of the transistor VT in the control relay circuit, between base stage b and ground, meet an anti-ring capacitor C.Described transistor VT be in, low-power transistor.The capacitance of described capacitor C 〉=10 μ F.
Described relay J be in, DC low-power relay.Described switch switching circuit 10 is the cutter K in one group of single-pole double-throw switch (SPDT) of relay J
1Connect the high-voltage output end mouth of high-voltage amplifier, its normally closed contact ground connection, the cutter K in another group single-pole double-throw switch (SPDT)
2Link to each other with two contacts of the mains switch of high-voltage amplifier respectively with normal opened contact.
This high-voltage amplifier, when start, high-voltage output end does not produce surge voltage; Do not produce Kickback voltage during shutdown; The stability of high pressure output reaches≤and ± 0.2%.Guaranteed the safety and stability reliability service of load.Through photoelectricity research institute of University Of Shanxi application test on laser, prove its fail safe, stability and reliability, obviously be better than existing product.
Claims (4)
1. high-voltage amplifier, comprise that the GAIN signal damping amplifies (1), BIAS signal damping (2), two signals mix back input inversion amplifier (3), again with the output signal enter drive (4) of inverting amplifier (3), remove driving amplifier (5), the output signal of amplifier (5) is sent into final stage power amplifier (6), final stage power amplifier (6) gained high direct voltage or high direct voltage modulated function signal are delivered to high-voltage amplifier output (HV OUT), linear direct current regulated power supply (7) provides high voltage regulated power supply for amplifier (5) and final stage power amplifier (6), high-voltage amplifier with the output of high direct voltage modulating function signal, is characterized in that and will import the input port (V of pre-amplification circuit (8) through the BIAS signal of signal damping (2) output under amplification mode
s), the digital signal after pre-amplification circuit (8) is handled is through resistance R
4The input (b) of cut-in relay control circuit (9), with the relay (J) in the control relay control circuit (9), dead electricity, by relay (J), dead electricity realizes the handoff functionality of switch switching circuit (10), finish the switching of high-voltage amplifier output port shorted to earth and open circuit, and the switching of POWER self-insurance and self-insurance releasing; Each high-voltage capacitor in parallel of the two ends of four rectifier diodes in the described linear direct current regulated power supply (7) and constitute low-frequency disturbance and suppress circuit (11); Described pre-amplification circuit (8) is formed in-phase amplification circuit, R by direct current or low frequency integrated operational amplifier (U)
2And R
3Be feedback resistance, R
1Be isolation resistance, diode (D
1) with the BIAS signal limitations of the in-phase input end of direct current or low frequency integrated operational amplifier (U) at≤0.7V, the output end voltage of amplifier (U) is by voltage stabilizing didoe (D
2) be limited in 2V～3V; Described control relay circuit (9) is that BIAS digital signal by pre-amplification circuit (8) output is through current-limiting resistance (R
4) send into the base stage (b) of the transistor (VT) in the control relay circuit, between base stage (b) and ground, connect an anti-ring capacitor (C).
2. high-voltage amplifier according to claim 1 is characterized in that: described transistor (VT) be in, low-power transistor; The capacitance of described capacitor (C) 〉=10 μ F.
3. high-voltage amplifier according to claim 1 is characterized in that: described relay (J) be in, DC low-power relay.
4. high-voltage amplifier according to claim 1 is characterized in that: described switch switching circuit (10) is the cutter (K in one group of single-pole double-throw switch (SPDT) of relay (J)
1) connect the high-voltage output end mouth of high-voltage amplifier, its normally closed contact ground connection, the cutter (K in another group single-pole double-throw switch (SPDT)
2) link to each other with two contacts of the mains switch of high-voltage amplifier respectively with normal opened contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100124081A CN100342641C (en) | 2005-03-14 | 2005-03-14 | High-voltage amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100124081A CN100342641C (en) | 2005-03-14 | 2005-03-14 | High-voltage amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1665126A CN1665126A (en) | 2005-09-07 |
| CN100342641C true CN100342641C (en) | 2007-10-10 |
Family
ID=35036056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100124081A Expired - Fee Related CN100342641C (en) | 2005-03-14 | 2005-03-14 | High-voltage amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100342641C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902206A (en) * | 2010-02-12 | 2010-12-01 | 上海楷锐音响设备有限公司 | Audio power amplifier with audio signal control switch |
| CN102142813B (en) * | 2011-03-30 | 2013-01-23 | 山西大学 | Low-noise high-voltage amplifier |
| CN103676725A (en) * | 2013-11-20 | 2014-03-26 | 中国航空工业集团公司北京长城计量测试技术研究所 | High-voltage piezoelectric ceramic controller with function of power-on impact |
| CN106772208B (en) * | 2016-12-30 | 2023-11-28 | 杭州海兴电力科技股份有限公司 | Single three-phase meter integrated reliability test board |
| CN112953422B (en) * | 2021-04-19 | 2023-02-10 | 中国科学院长春光学精密机械与物理研究所 | Power amplifier and integrated piezoelectric ceramic driver |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2334121Y (en) * | 1998-02-24 | 1999-08-18 | 陈培莉 | High-voltage audio power amplifier without transformer |
| JP2004336643A (en) * | 2003-05-12 | 2004-11-25 | Victor Co Of Japan Ltd | Power amplifier circuit |
-
2005
- 2005-03-14 CN CNB2005100124081A patent/CN100342641C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2334121Y (en) * | 1998-02-24 | 1999-08-18 | 陈培莉 | High-voltage audio power amplifier without transformer |
| JP2004336643A (en) * | 2003-05-12 | 2004-11-25 | Victor Co Of Japan Ltd | Power amplifier circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1665126A (en) | 2005-09-07 |
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Granted publication date: 20071010 Termination date: 20140314 |