CN109660122A - A kind of caesium clock multiplier adjustable high voltage power supply circuit based on shunting method of adjustment - Google Patents
A kind of caesium clock multiplier adjustable high voltage power supply circuit based on shunting method of adjustment Download PDFInfo
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- CN109660122A CN109660122A CN201811486366.9A CN201811486366A CN109660122A CN 109660122 A CN109660122 A CN 109660122A CN 201811486366 A CN201811486366 A CN 201811486366A CN 109660122 A CN109660122 A CN 109660122A
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- voltage
- circuit
- adjustment
- shunting
- output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a kind of based on the caesium clock multiplier adjustable high voltage power supply circuit for shunting method of adjustment, is made of DC/DC translation circuit, shunt regulating circuit, control circuit, high direct voltage amplifying circuit.It carries out voltage in low-pressure side using low-voltage adjustment pipe and shunts adjustment, and high direct voltage amplifying circuit is recycled to carry out DC voltage amplification, reduces the voltage stress of adjustment pipe；The adjusting of adjustable voltage is carried out using shunt regulating method, the driving circuit for adjusting pipe is simple；The metering function of shunt regulating circuit, so that it is more suitable for protecting high-tension circuit.
Description
Technical field
The invention belongs to instrument fields, and in particular to a kind of based on the caesium clock multiplier adjustable height for shunting method of adjustment
Piezoelectricity source circuit.
Background technique
In all kinds of atomic clocks, cesium-beam atomic clock is famous with its high-precision and outstanding long-time stability.Multiplier makes
It is one of the factor for restricting cesium-beam atomic clock life performance with the service life.The amplification factor of multiplier is dropped with the increase of service life
It is low.The common method for solving multiplier service life at present is to improve multiplier operating voltage to improve its amplification factor.It uses
This method must solve the problems, such as it is that negative high voltage needed for multiplier work is adjustable, that is, needs adjustable negative high voltage power source.Times
The load for increasing device negative high voltage power source is small, and operating current is tens micromicroamperes of magnitudes.
For low current adjustable high voltage power supply, two problems for needing to solve are high pressure respectively and adjustable.Voltage is adjustable, needs
Use adjustment pipe.Data shows that the adjustment pipe is series connection adjustment.The realization of adjustable high voltage power supply, can be and first realize high pressure,
Realizing again adjustable --- adjustment pipe Q1 is placed in high-pressure side, as shown in Figure 1；It is also possible to first realize adjustable, then realizes height
Pressure --- adjustment pipe Q1 is placed in low-pressure side, as shown in Figure 2.
Series connection method of adjustment in high-pressure side shown in FIG. 1, adjusts pipe in high-pressure side, it is therefore necessary to be high tension apparatus, device
Type selecting is a hang-up；And adjust that pipe base drive voltage is very high, driving circuit is also complicated.Advantage is its noise
Small, this method is suitable for the occasion to noise-sensitive.
The realization of adjustable high voltage power supply at present generallys use the method that adjustment pipe is placed in low-pressure side --- first in low-pressure side
It realizes that voltage is adjustable, then with the DC voltage amplifying circuit of certain voltage gain, its voltage is amplified to required high pressure.
The gain of DC voltage amplifying circuit be it is fixed, input voltage is adjustable, then it is adjustable to export high pressure, to realize adjustable height
Pressure.This method is as shown in Figure 2.Adjustment pipe Q1 can use ambipolar triode, can also be using monopole type
MOSFET.But either triode or MOSFET, what is generallyd use is the method for series connection adjustment --- output and adjustment pipe
It is arranged in series.Series connection adjustment pipe, since triode is current drive-type transistor device, driving electricity are done using triode
Road is complicated.Also, the base voltage of triode follows output voltage or input voltage, its driving circuit is caused also to need to solve
Level conversion problem.There are two problems for circuit shown in Fig. 2.First is that the electrical isolation for not solving input and control circuit is asked
Topic；Second is that the protective value of High voltage output is poor --- if there are the failure problems such as sparking in high-pressure section, adjusts pipe Q1 at this time
It cannot be adjusted to high impedance status in time, or be unable to adjust as high impedance status, even low impedance state, high-pressure section is defeated
Energy out can be very high, cannot protect the load of High voltage output.
Summary of the invention
In view of this, the present invention provides a kind of based on the caesium clock multiplier adjustable high voltage power supply electricity for shunting method of adjustment
Road, the method that it uses shunt regulating carry out voltage adjustment in low-pressure side, high direct voltage amplifying circuit are recycled to carry out direct current
Voltage amplification.
In order to solve the above-mentioned technical problem, the present invention is implemented as follows:
A kind of caesium clock multiplier adjustable high voltage power supply circuit based on shunting method of adjustment, including DC/DC circuit is isolated, divides
Flow adjustment circuit, control circuit and high direct voltage amplifying circuit；
DC/DC converter is isolated, is used for input voltage VinIt is converted into and VinIsolation, stable voltage V1, is input to
Shunt adjustment circuit；
Control circuit, according to the control voltage V of inputC, to the driving signal V for shunting adjustment circuit output adjustment pipe Q1D；
Adjustment circuit is shunted, the input voltage after being isolated is linked into the concatenated form of current-limiting resistance R1 using adjustment pipe Q1
Between the main track and loop line of V1, the driving signal V of control circuit outputDDriving current I is transformed to via resistance R9D, adjust pipe Q1
With driving current IDAs driving signal；The tie point adjusted between pipe Q1 and current-limiting resistance R1 is known as split point, passes through drive
Streaming current IDAdjusting realize shunting of the adjustment pipe Q1 to the total current for flowing through R1, to change split point rear end equivalent load
It shunts, realizes driving current IDAdjustment to split point voltage V2；Adjustment pipe Q1 is realized with NPN triode；
High direct voltage amplifying circuit carries out DC voltage amplification to the output voltage V2 for shunting adjustment circuit, and high direct voltage is put
The output end of big circuit is the adjustable high voltage power supply that caesium clock multiplier needs.
Preferably, which further comprises filtering and voltage sampling circuit, for believing the output for shunting adjustment circuit
After number V2 is filtered, partial pressure sampling is carried out, by sampled voltage V3 feedback to control circuit, forms control voltage VCWith output electricity
The closed-loop control between V2 is pressed, so that control voltage VCControl range correspond to it is subsequent shunt adjustment circuit output voltage V2 change
Press range.
Preferably, filtering and voltage sampling circuit are made of filter capacitor C2, resistance R2 and resistance R3；Capacitor C2 is connected in parallel on
Between the collector and emitter for adjusting pipe Q1；It is in parallel with filter capacitor C2 after resistance R2 and resistance R3 series connection；Resistance R2 and electricity
The tie point hindered between R3 generates sampled voltage V3, connects the non-inverting input terminal of operational amplifier OA1 in control circuit；Operation is put
The inverting input terminal of big device OA1 is as control voltage VCInput, while passing through the output of capacitor C1 connection operational amplifier OA1
End；The output end of operational amplifier OA1 exports the driving voltage VD。
Compared with the prior art, the invention has the advantages that:
(1) present invention carries out voltage adjustment in low-pressure side using low-voltag transistor, and adjustment pipe Q1 can be using 35V electricity
The low voltage transistor of pressure reduces the voltage stress of adjustment pipe.
(2) for the present invention by the way of shunting adjustment, shunting is the translator of Chinese method of English shunt, can be intuitively
It is interpreted as in parallel, that is to say, that adjust pipe Q1 in the present invention and split point V2 backend load (part being adjusted) is in parallel
Connection type, then the adjustment of output voltage may be implemented by adjusting the adjustment that pipe Q1 is shunted.Using shunt regulating method
Benefit is: the driving circuit for adjusting pipe does not need level conversion, and driving circuit is simple；The metering function of the upper resistance of source, makes
It is good based on the High voltage output protection feature for shunting method of adjustment to obtain.
(3) in shunting adjustment circuit of the invention, adjustment pipe Q1 uses NPN triode, the emitter grounding of Q1, base emitter-base bandgap grading
Voltage is about 0.5V~0.7V, and after the current-limiting resistance R9 that connected, the driving voltage for shunting adjustment circuit is 10V~1V.Control
Circuit is generally 12V power supply, the output voltage capability range of the driving voltage of 10V~1V in the 12V control circuit powered
It is interior --- control circuit output can directly drive adjustment pipe Q1, do not need to carry out drive level conversion, simplify driving circuit
Design；
(4) R1 shunted in adjustment circuit also acts metering function, is suitable for protecting the load of High voltage output ---
What is protected in the present invention is multiplier；According to maximum power transfer law, ignore the energy consumption of adjustment pipe Q1, shunts adjustment electricity
The maximum power of road output are as follows:By adjusting the resistance value of R1, it can be obtained and need to protect power.
(5) setting of present invention isolation DC/DC circuit can satisfy control voltage VC(0V~5V) and input voltage VinEvery
From requirement, and the input voltage V of wide scope can be madeinIt is transformed to stable voltage V1, reduces and shunts in adjustment circuit
The power pressure of resistance R1.
(6) present invention filtering and the setting of voltage sampling circuit are so that control voltage VCControl range strictly correspond to it is subsequent
The transformation range for shunting adjustment circuit output voltage V2, ensure that the precision of control.
Detailed description of the invention
Fig. 1 is the adjustable negative high voltage power source of multiplier of high-pressure side adjustment in the prior art；
Fig. 2 is the adjustable negative high voltage power source of multiplier of low-pressure side adjustment in the prior art；
Fig. 3 is that the present invention is based on the composition block diagrams for the caesium clock multiplier adjustable high voltage power supply circuit for shunting adjustment；
Fig. 4 is that the present invention is based on the circuit diagrams for the caesium clock multiplier adjustable high voltage power supply circuit for shunting method of adjustment.
Specific embodiment
The present invention will now be described in detail with reference to the accompanying drawings and examples.
The present invention provides it is a kind of based on shunt method of adjustment caesium clock multiplier adjustable high voltage power supply circuit, the circuit
Composition block diagram is as shown in Figure 3 comprising isolation DC/DC circuit 1 shunts adjustment circuit 2, control circuit 4 and high direct voltage amplification
Circuit 5.Preferably, in order to guarantee output voltage range strictly corresponding control voltage range, filtering and voltage sample are also added
Circuit 3.
DC/DC circuit 1 is isolated, is used for input voltage VinIt is converted into and Vin(centre becomes isolation, stable voltage V1
Measure, be 35V in the present embodiment), it is input to shunting adjustment circuit.The setting of the module can satisfy control voltage VC(0V~5V)
With input voltage VinThe requirement of isolation, and the power pressure for shunting resistance R1 in adjustment circuit can be reduced.
Control circuit 4, for the control voltage V according to inputC, adjust to the adjustment pipe Q1 for shunting the output of adjustment circuit 2
Driving signal VD。VCThe adjustable V of variationD(range is 1V~10V in the present embodiment), and VDCorresponding shunt of variation adjust
The variation for the voltage V2 that whole circuit 2 is exported.In this preferred embodiment, in order to guarantee VCVariation range (0V~5V) it is stringent right
The variation range (3V~30V) of V2 is answered, then the control circuit 4 has been further introduced into the feedback signal V3 of characterization V2 size, this is anti-
Feedback signal V3 is that filtering and voltage sampling circuit 3 provide, and V3 feedback forms control voltage V into control circuit 4CWith output electricity
The closed-loop control between V2 is pressed, so that control voltage VCControl range correspond to and subsequent shunt adjustment circuit 2 output voltage V2
Transformation range.
Shunt 2 core of the invention of adjustment circuit.In conjunction with Fig. 4, the shunting adjustment circuit 2 is using NPN triode as tune
Homogeneous tube Q1, adjustment pipe Q1 be linked into the concatenated form of current-limiting resistance R1 the input voltage V1 after being isolated main track and loop line it
Between, the driving signal V of the output of control circuit 4DDriving current I is transformed to via resistance R9D, pipe Q1 is adjusted with driving current IDMake
For driving signal.The tie point adjusted between pipe Q1 and current-limiting resistance R1 is known as split point (voltage V2 point in Fig. 4), is flowed
Electric current through resistance R1 is total current, adjusts pipe Q1 with the equivalent load that split point back-end circuit is formed and forms circuit knot in parallel
Configuration formula, adjustment pipe Q1 is a branch of electric current, and split point rear end equivalent load is an other branch for electric current.Work as tune
When homogeneous tube Q1 branch current changes, in the case where total current is constant, split point rear end equivalent load divides electric current to change,
So that V2 changes.So, pass through driving current IDAdjusting, adjustment pipe Q1 may be implemented to flowing through R1 total current
It shunts, to change the electric current of split point rear end equivalent load, realizes driving current IDAdjustment to split point voltage V2.IDAgain
It is by VCControl, to realize control voltage VCControl to V2.V2 is simultaneously as the output for shunting adjustment circuit 2.
Filtering and voltage sampling circuit 3 are divided after being filtered to the output signal V2 for shunting adjustment circuit 2
Sampled voltage V3 feedback to control circuit 4 is formed control voltage V by pressure samplingCClosed loop adjustment between output voltage V2,
So that control voltage VCControl range correspond to it is subsequent shunt 2 output voltage V2 of adjustment circuit transformation range.In the present embodiment,
By the selection of dividing ratios, so that the range of V3 is (0.5V~5V).
High direct voltage amplifying circuit 5, for carrying out direct current to the output voltage V2 (3V~30V) for shunting adjustment circuit 2
Press the adjustable high voltage power supply V big, the output end of high direct voltage amplifying circuit 5 needs for caesium clock multiplierO.In the present embodiment, VO
Range be -300V~-3000V.
In the present embodiment, the output 10V of input control voltage 0V and control circuit 4, shunt adjustment circuit 2 output 3V and
- the 300V of adjustable High voltage output is corresponding；Similarly, the input control voltage 5V and output 1V of control circuit 4, shunting adjustment circuit 2
Output 30V and adjustable High voltage output -3000V it is corresponding.
The physical circuit realization of foregoing circuit is described below.Circuit diagram is referring to fig. 4.
In isolation DC/DC circuit 1, input voltage main track VinThe input positive terminal of+connection isolation DC/DC converter, it is defeated
Enter voltage loop line VinThe input loop line end of connection isolation DC/DC converter；The output positive terminal connection of DC/DC converter is isolated
One end of resistance R1 in adjustment circuit 2 is shunted, the output loop line end connection of isolation DC/DC converter shunts NPN in adjustment circuit 2
The emitter terminal of triode Q1.
Adjustment circuit 2 is shunted to be made of resistance R1, NPN triode Q1 and resistance R9.The other end of resistance R1 connects NPN
The collector terminal of triode Q1 forms the concatenated structure of the two, and the two tie point is known as split point, i.e., the V2 point in figure,
It is the output of this shunting adjustment circuit 2.The base stage of NPN triode Q1 passes through the output end V of resistance R9 connection control circuit 4D。
Filtering and voltage sampling circuit 3 are made of filter capacitor C2, resistance R2 and resistance R3.Capacitor C2 is connected in parallel on adjustment pipe
Between the collector and emitter of Q1；It is in parallel with filter capacitor C2 after resistance R2 and resistance R3 series connection；Resistance R2 and resistance R3 it
Between tie point generate sampled voltage V3, connect control circuit 4 in operational amplifier OA1 non-inverting input terminal.
In control circuit 4,0V~5V controls voltage VCPositive terminal connection operational amplifier circuit OA1 inverting input terminal and electricity
Hold one end of C1；Control the emitter terminal of the loop line end connection NPN triode Q1 of voltage；The other end of capacitor C1 connects amplifier
The output end of circuit OA1；The output end of operational amplifier circuit OA1 is also connected with one end of resistance R9.
The input terminal connection of high direct voltage amplifying circuit 5 shunts the output of adjustment circuit 2, high direct voltage amplifying circuit 5
Output is adjustable High voltage output.The emitter terminal of the input loop line end connection NPN triode Q1 of high direct voltage amplifying circuit 5.
As it can be seen that it is of the invention based on the caesium clock multiplier adjustable high voltage power supply circuit for shunting method of adjustment, using low-voltage
It adjusts pipe and carries out voltage shunting adjustment in low-pressure side, recycle high direct voltage amplifying circuit to carry out DC voltage amplification, reduce
Adjust the voltage stress of pipe；The adjusting of adjustable voltage is carried out using shunt regulating method, the driving circuit for adjusting pipe is simple；Point
Stream adjusts the metering function of circuit, so that it is more suitable for protecting high-tension circuit.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (3)
1. a kind of based on the caesium clock multiplier adjustable high voltage power supply circuit for shunting method of adjustment, which is characterized in that including DC/ is isolated
DC circuit (1) shunts adjustment circuit (2), control circuit (4) and high direct voltage amplifying circuit (5)；
It is isolated DC/DC converter (1), is used for input voltage VinIt is converted into and VinIsolation, stable voltage V1, is input to point
It flows adjustment circuit (2)；
Control circuit (4), according to the control voltage V of inputC, to the driving signal for shunting adjustment circuit (2) output adjustment pipe Q1
VD；
It shunts adjustment circuit (2), the input voltage after being isolated is linked into the concatenated form of current-limiting resistance R1 using adjustment pipe Q1
Between the main track and loop line of V1, the driving signal V of control circuit (4) outputDDriving current I is transformed to via resistance R9D, adjustment
Pipe Q1 is with driving current IDAs driving signal；The tie point adjusted between pipe Q1 and current-limiting resistance R1 is known as split point, is led to
Overdrive electric current IDAdjusting realize shunting of the adjustment pipe Q1 to the total current for flowing through R1, to change split point rear end equivalent negative
Driving current I is realized in the shunting of loadDAdjustment to split point voltage V2；Adjustment pipe Q1 is realized with NPN triode；
High direct voltage amplifying circuit (5) carries out DC voltage amplification, high direct voltage to the output voltage V2 for shunting adjustment circuit (2)
The output end of amplifying circuit (5) is the adjustable high voltage power supply that caesium clock multiplier needs.
2. it is as described in claim 1 a kind of based on the caesium clock multiplier adjustable high voltage power supply circuit for shunting method of adjustment, it is special
Sign is that the circuit further comprises filtering and voltage sampling circuit (3), for the output signal for shunting adjustment circuit (2)
After V2 is filtered, partial pressure sampling is carried out, by sampled voltage V3 feedback to control circuit (4), forms control voltage VCWith output
Closed-loop control between voltage V2, so that control voltage VCControl range correspond to subsequent shunting adjustment circuit (2) output voltage
The transformation range of V2.
3. it is as claimed in claim 2 a kind of based on the caesium clock multiplier adjustable high voltage power supply circuit for shunting method of adjustment, it is special
Sign is that filtering and voltage sampling circuit (3) are made of filter capacitor C2, resistance R2 and resistance R3；Capacitor C2 is connected in parallel on adjustment
Between the collector and emitter of pipe Q1；It is in parallel with filter capacitor C2 after resistance R2 and resistance R3 series connection；Resistance R2 and resistance R3
Between tie point generate sampled voltage V3, connection control circuit (4) in operational amplifier OA1 non-inverting input terminal；Operation is put
The inverting input terminal of big device OA1 is as control voltage VCInput, while passing through the output of capacitor C1 connection operational amplifier OA1
End；The output end of operational amplifier OA1 exports the driving voltage VD。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811486366.9A CN109660122B (en) | 2018-12-06 | 2018-12-06 | Adjustable high-voltage power supply circuit of cesium clock multiplier based on shunt adjustment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811486366.9A CN109660122B (en) | 2018-12-06 | 2018-12-06 | Adjustable high-voltage power supply circuit of cesium clock multiplier based on shunt adjustment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109660122A true CN109660122A (en) | 2019-04-19 |
| CN109660122B CN109660122B (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811486366.9A Active CN109660122B (en) | 2018-12-06 | 2018-12-06 | Adjustable high-voltage power supply circuit of cesium clock multiplier based on shunt adjustment method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101478238A (en) * | 2009-01-12 | 2009-07-08 | 浙江大学 | Three-level parallel resonance dc-dc current transformer |
| CN202615258U (en) * | 2012-01-19 | 2012-12-19 | 武汉谱晰科技有限公司 | Extremely low static adjustable high-voltage direct current linear voltage stabilizer |
| CN205544935U (en) * | 2016-01-22 | 2016-08-31 | 国网甘肃省电力公司信息通信公司 | Linear reduction voltage circuit of optical coupling isolation formula high pressure |
| CN106160417A (en) * | 2016-08-11 | 2016-11-23 | 惠州三华工业有限公司 | A kind of wide positive and negative adjustable high voltage D. C of scope and control method thereof |
| CN108599742A (en) * | 2018-04-11 | 2018-09-28 | 西安交通大学 | A kind of the negative high voltage Pulased power supply unit and parametrization adjusting method of Parameter adjustable |
-
2018
- 2018-12-06 CN CN201811486366.9A patent/CN109660122B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101478238A (en) * | 2009-01-12 | 2009-07-08 | 浙江大学 | Three-level parallel resonance dc-dc current transformer |
| CN202615258U (en) * | 2012-01-19 | 2012-12-19 | 武汉谱晰科技有限公司 | Extremely low static adjustable high-voltage direct current linear voltage stabilizer |
| CN205544935U (en) * | 2016-01-22 | 2016-08-31 | 国网甘肃省电力公司信息通信公司 | Linear reduction voltage circuit of optical coupling isolation formula high pressure |
| CN106160417A (en) * | 2016-08-11 | 2016-11-23 | 惠州三华工业有限公司 | A kind of wide positive and negative adjustable high voltage D. C of scope and control method thereof |
| CN108599742A (en) * | 2018-04-11 | 2018-09-28 | 西安交通大学 | A kind of the negative high voltage Pulased power supply unit and parametrization adjusting method of Parameter adjustable |
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| Publication number | Publication date |
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| CN109660122B (en) | 2021-04-02 |
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