CN106841964B - High-precision programmable voltage soft circuit - Google Patents
High-precision programmable voltage soft circuit Download PDFInfo
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- CN106841964B CN106841964B CN201611165856.XA CN201611165856A CN106841964B CN 106841964 B CN106841964 B CN 106841964B CN 201611165856 A CN201611165856 A CN 201611165856A CN 106841964 B CN106841964 B CN 106841964B
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- operational amplifier
- resistance
- input terminal
- inverting input
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
Abstract
The present invention proposes a kind of high-precision programmable voltage soft circuit, on-site programmable gate array FPGA signal connects digital regulation resistance, the non-inverting input terminal of the first operational amplifier is connected through digital regulation resistance with reference to the reference voltage VREF in generation circuit, the non-inverting input terminal of first operational amplifier is grounded through divider resistance, the inverting input terminal of first operational amplifier connects the output end of the first operational amplifier, the non-inverting input terminal of the output end connection second operational amplifier of first operational amplifier, output voltage is successively through first resistor, second resistance ground connection, the inverting input terminal of second operational amplifier is connected between first resistor and second resistance, the output end of the calibrated device circuit connection second operational amplifier of the inverting input terminal of second operational amplifier, the output end signal of second operational amplifier connects pulse width modulator.The invention has the benefit that voltage soft time Programmable Design and output voltage soft-start time high precision design may be implemented.
Description
Technical field
The present invention relates to semiconductor devices analysis technical fields, more particularly to a kind of high-precision programmable voltage soft
Circuit.
Background technique
It is conventional with the development and the complicated demand tested automatically of semiconductor device processing technology, power electronic technique
Voltage-to-current (IV) measurement and capacitance-voltage (CV) measurement can no longer meet semiconducter device testing demand, need high-precision
Its dynamic performance characteristics is tested in heavy current pulse source.
Common direct current inputs heavy current pulse source block diagram, is generated as shown in Figure 1: by DC-DC transformation, pulse, control electricity
Road, driving isolation circuit, sample circuit, accessory power supply and man-machine interface composition.There are three crucial circuits in block diagram: DC-DC
Transformation, pulse generation and control circuit, especially DC-DC conversion circuit provide the exciting power entirely exported, in design
Generally use large capacity storage capacitor, the fan-out capability of Lai Tigao heavy current pulse.But the use of large capacity storage capacitor, it gives
The starting of DC-DC converter brings very big difficulty.In DC-DC conversion circuit design, usually opened using the soft of PWM chip
Dynamic pin connects capacitor to realize soft start.Common PWM chip soft start interior section circuit, as shown in Figure 2: in pin 8
Capacitor is connected with to realize output voltage soft start, soft-start time is by external capacitor, constant current source charging electric current and Voltage Reference
(VREF) it determines, due to the precision problem of constant-current source inside connection capacitance error, Voltage Reference precision problem and PWM chip, makes
It is difficult at the high precision design of output voltage soft-start time, and cannot achieve the programmable of output voltage soft-start time and set
Meter.
Summary of the invention
The purpose of the present invention is to provide a kind of high-precision programmable voltage soft circuits, solve the voltage soft time
The problem of design and output voltage soft-start time high precision design difficulty cannot be programmed.
The present invention provides a kind of high-precision programmable voltage soft circuit, including on-site programmable gate array FPGA, can
Power transformation hinders generation circuit, with reference to generation circuit, error amplifying circuit and pulse-width modulation circuit, and variable resistance generation circuit includes number
Word potentiometer and variable resistance generation circuit peripheral circuit, on-site programmable gate array FPGA signal connect digital regulation resistance, ginseng
Examining generation circuit includes the first operational amplifier, with reference to the reference voltage VREF in generation circuit through digital regulation resistance connection first
The non-inverting input terminal of the non-inverting input terminal of operational amplifier, the first operational amplifier is grounded through divider resistance, the first operation amplifier
The inverting input terminal of device connects the output end of the first operational amplifier, and error amplifying circuit includes second operational amplifier, and first
The non-inverting input terminal of the output end connection second operational amplifier of operational amplifier, output voltage is successively through first resistor, second
Resistance eutral grounding connects the inverting input terminal of second operational amplifier, second operational amplifier between first resistor and second resistance
The calibrated device circuit connection second operational amplifier of inverting input terminal output end, include pulsewidth modulation in pulse-width modulation circuit
The output end signal of device and pulsewidth modulation peripheral circuit, second operational amplifier connects pulse width modulator.
Further, the end CLK, the end SDI of digital regulation resistance,End andEnd is separately connected field programmable gate array
FPGA。
Further, in variable resistance generation circuit peripheral circuit, the end CLK of digital regulation resistance, the end SDI,End andEnd connects power supply through 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance respectively.
Further, in variable resistance generation circuit peripheral circuit, the power end of digital regulation resistance connects power supply, power supply warp
First capacitor ground connection.
Further, divider resistance is the precision resistance that precision is 0.1%.
Further, the power pins of the first operational amplifier connect power supply, and power supply is through the second capacity earth.
Further, the non-inverting input terminal of second operational amplifier is through third capacity earth.
Further, Correction circuit include the 4th capacitor, the 5th capacitor and the 7th resistance, second operational amplifier it is anti-
Phase input terminal all the way through the 4th capacitor, the 7th resistance connection second operational amplifier output end, second operational amplifier it is anti-
Output end of the phase input terminal another way through the 5th capacitance connection second operational amplifier.
Compared with prior art, high-precision programmable voltage soft circuit of the invention has the characteristics that and advantage:
High-precision programmable voltage soft circuit of the invention, may be implemented voltage soft time Programmable Design with
And output voltage soft-start time high precision design.
After a specific embodiment of the invention is read in conjunction with the figure, the features and advantages of the invention be will become clearer.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is that common direct current inputs heavy current pulse source block diagram；
Fig. 2 is common PWM chip soft start interior section circuit；
Fig. 3 is high-precision programmable voltage soft circuit in the embodiment of the present invention.
Specific embodiment
As shown in figure 3, the present embodiment provides a kind of high-precision programmable voltage soft circuit, including field programmable gate
Array FPGA, variable resistance generation circuit, with reference to generation circuit, error amplifying circuit and pulse-width modulation circuit.
Variable resistance generation circuit includes digital regulation resistance D1 and variable resistance generation circuit peripheral circuit, in the present embodiment
Digital regulation resistance D1 using ANALOG DEVICES company model AD5260BRUZ20 256 bit digital potentiometer D1,
Its pin 6, pin 7, pin 8 and pin 9 respectively correspond the end CLK, the end SDI,End andEnd, the CLK of digital regulation resistance D1
End, the end SDI,End andEnd connects power supply+5V through resistance R7, R6, R5, R4 respectively, and the power end of digital regulation resistance D1 connects
Connect power supply, power supply is grounded through capacitor C7, the end CLK, the end SDI,End andEnd is separately connected on-site programmable gate array FPGA.
Pin 6, pin 7, pin 8 and pin 9 control signal generated by on-site programmable gate array FPGA, so that accurately control is variable
The output resistance and programming time of resistance generation circuit.
D2 uses low-power consumption, low noise and the low distortion dual operational amplifier of ANALOG DEVICES company, including first
Operational amplifier D2:1 and second operational amplifier D2:2.
It include the first operational amplifier D2:1 and its peripheral circuit with reference to generation circuit, with reference to the reference electricity in generation circuit
VREF is pressed to generate 2.5V reference voltage signal using the LT1009CZ of LINEAR TECHNOLOGY company, reference voltage is maximum
Initial precision is 0.2%.The pin 2 of reference voltage VREF connection digital regulation resistance D1, reference voltage VREF are passed through with digital current potential
Device D1 is that the variable resistance generation circuit of main composition part continues on through the same mutually defeated of first operational amplifier D2:1 of the connection of pin 3
Enter end.The non-inverting input terminal of first operational amplifier D2:1 is grounded through divider resistance R9, the essence that divider resistance R9 precision is 0.1%
Cipher telegram resistance.The inverting input terminal of first operational amplifier D2:1 connects the output end of the first operational amplifier D2:1.Reference voltage
VREF generates reference signal by the first operational amplifier D2:1 after variable resistance generation circuit, divider resistance R9 partial pressure
REFVSET。
Error amplifying circuit includes second operational amplifier D2:2 and its peripheral circuit, and the first operational amplifier D2:1's is defeated
Outlet connect second operational amplifier D2:2 non-inverting input terminal, the first operational amplifier D2:1 power pins connection power supply+
5V, power supply+5V are grounded through capacitor C8, and the non-inverting input terminal of second operational amplifier D2:2 is grounded through capacitor C9.Output voltage VO
It is successively grounded and divides through resistance R11, resistance R12, through resistance R13 connection second operational amplifier between resistance R11 and resistance R12
The inverting input terminal of D2:2, the calibrated device circuit connection second operational amplifier of the inverting input terminal of second operational amplifier D2:2
The output end of D2:2.Correction circuit in the present embodiment includes capacitor C10, capacitor C11 and resistance R14, is adjusted using PI.The
The output through capacitor C10, resistance R14 connection second operational amplifier D2:2 all the way of the inverting input terminal of two operational amplifier D2:2
End, the inverting input terminal another way of second operational amplifier D2:2 is through the output of capacitor C11 connection second operational amplifier D2:2
End.
Output voltage V0 carries out error and puts after resistance R11 and resistance R12 partial pressure with variable reference signal REFVSET
Greatly, the COMP pin that error controling signal COMP removes control pulse width modulator N1 is generated.It include pulsewidth tune in pulse-width modulation circuit
The output end signal of device N1 and pulsewidth modulation peripheral circuit processed, second operational amplifier D2:2 connect pulse width modulator N1.Pulsewidth
Modulator N1 uses the pulse width modulator N1 of the model LM5035MH of TEXAS INSTRUMENTS company.Pulse width modulator N1
It is integrated with half-bridge circuit driving and synchronous rectification driving, main function is the control errors letter for generating error amplifying circuit
Number COMP transforms into driving signal and goes drive control to open by the end HS (pin 12), the end HO (pin 13), the end LO (pin 14)
Guan Guan, to complete the closed-loop control of output voltage V0.
To sum up, it is programmed through on-site programmable gate array FPGA, by above-mentioned variable resistance generation circuit, with reference to generation electricity
Road, error amplifying circuit and pulse-width modulation circuit realize voltage soft time Programmable Design and output voltage V0 are soft opens
Dynamic time accuracy design.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the essential scope of the present invention also should belong to of the invention
Protection scope.
Claims (8)
1. a kind of high-precision programmable voltage soft circuit, it is characterised in that: including on-site programmable gate array FPGA, can be changed
Resistance generation circuit, with reference to generation circuit, error amplifying circuit and pulse-width modulation circuit, variable resistance generation circuit includes number
Potentiometer and variable resistance generation circuit peripheral circuit, on-site programmable gate array FPGA signal connect digital regulation resistance, reference
Generation circuit includes the first operational amplifier, with reference to the reference voltage VREF in generation circuit through the first fortune of digital regulation resistance connection
The non-inverting input terminal of amplifier is calculated, the non-inverting input terminal of the first operational amplifier is grounded through divider resistance, the first operational amplifier
Inverting input terminal connect the output end of the first operational amplifier, error amplifying circuit includes second operational amplifier, the first fortune
The non-inverting input terminal of the output end connection second operational amplifier of amplifier is calculated, output voltage is successively through first resistor, the second electricity
Resistance ground connection, connects the inverting input terminal of second operational amplifier between first resistor and second resistance, second operational amplifier
The output end of the calibrated device circuit connection second operational amplifier of inverting input terminal includes pulse width modulator in pulse-width modulation circuit
And pulsewidth modulation peripheral circuit, the output end signal of second operational amplifier connect pulse width modulator.
2. high-precision programmable voltage soft circuit according to claim 1, it is characterised in that: digital regulation resistance
The end CLK, the end SDI,End andEnd is separately connected on-site programmable gate array FPGA.
3. high-precision programmable voltage soft circuit according to claim 2, it is characterised in that: variable resistance generates electricity
In the peripheral circuit of road, the end CLK of digital regulation resistance, the end SDI,End andEnd is respectively through 3rd resistor, the 4th resistance, the 5th
Resistance, the 6th resistance connect power supply.
4. high-precision programmable voltage soft circuit according to claim 1, it is characterised in that: variable resistance generates electricity
In the peripheral circuit of road, the power end of digital regulation resistance connects power supply, and power supply is grounded through first capacitor.
5. high-precision programmable voltage soft circuit according to claim 1, it is characterised in that: divider resistance is precision
It is 0.1% precision resistance.
6. high-precision programmable voltage soft circuit according to claim 1, it is characterised in that: the first operational amplifier
Power pins connect power supply, power supply is through the second capacity earth.
7. high-precision programmable voltage soft circuit according to claim 1, it is characterised in that: second operational amplifier
Non-inverting input terminal through third capacity earth.
8. high-precision programmable voltage soft circuit according to claim 1, it is characterised in that: Correction circuit includes
4th capacitor, the 5th capacitor and the 7th resistance, the inverting input terminal of second operational amplifier is all the way through the 4th capacitor, the 7th resistance
The output end of second operational amplifier is connected, the inverting input terminal another way of second operational amplifier is through the 5th capacitance connection second
The output end of operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611165856.XA CN106841964B (en) | 2016-12-16 | 2016-12-16 | High-precision programmable voltage soft circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611165856.XA CN106841964B (en) | 2016-12-16 | 2016-12-16 | High-precision programmable voltage soft circuit |
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| CN106841964A CN106841964A (en) | 2017-06-13 |
| CN106841964B true CN106841964B (en) | 2019-04-09 |
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| CN111954329B (en) * | 2020-07-08 | 2022-05-06 | 中国电子科技集团公司第四十一研究所 | Continuous power closed-loop control device and method based on FPGA |
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| CN101562394A (en) * | 2009-03-06 | 2009-10-21 | 西安民展微电子有限公司 | Soft start circuit used in monolithic integration switching-type regulator |
| CN202182911U (en) * | 2011-07-27 | 2012-04-04 | 万洲电气集团有限公司 | Automatic gain regulating current detection circuit of low voltage soft starter |
| CN102904429A (en) * | 2012-09-17 | 2013-01-30 | 苏州天辰马智能设备有限公司 | Soft start method and device of busbar voltage of alternating-current servo actuator |
| CN103378717A (en) * | 2012-04-16 | 2013-10-30 | 鸿富锦精密工业（深圳）有限公司 | Soft-start time control circuit |
| CN203352508U (en) * | 2013-07-16 | 2013-12-18 | 成都新洲航空设备有限责任公司 | FPGA-based aviation motor soft start system |
| CN104883045A (en) * | 2015-05-28 | 2015-09-02 | 株洲变流技术国家工程研究中心有限公司 | Switch power supply soft start circuit and switch power supply soft start method |
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| CN205429689U (en) * | 2015-12-10 | 2016-08-03 | 国网甘肃省电力公司 | Electric soft protection circuit on direct current power electronic equipment |
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| US7248026B2 (en) * | 2005-11-28 | 2007-07-24 | Micrel, Incorporated | Single-pin tracking/soft-start function with timer control |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295922A (en) * | 2008-06-13 | 2008-10-29 | 北京中星微电子有限公司 | Soft starting device capable of implementing linear control |
| CN101340142A (en) * | 2008-08-15 | 2009-01-07 | 华为技术有限公司 | Method, apparatus and system for soft startup of electric power |
| CN101562394A (en) * | 2009-03-06 | 2009-10-21 | 西安民展微电子有限公司 | Soft start circuit used in monolithic integration switching-type regulator |
| CN202182911U (en) * | 2011-07-27 | 2012-04-04 | 万洲电气集团有限公司 | Automatic gain regulating current detection circuit of low voltage soft starter |
| CN103378717A (en) * | 2012-04-16 | 2013-10-30 | 鸿富锦精密工业（深圳）有限公司 | Soft-start time control circuit |
| CN102904429A (en) * | 2012-09-17 | 2013-01-30 | 苏州天辰马智能设备有限公司 | Soft start method and device of busbar voltage of alternating-current servo actuator |
| CN203352508U (en) * | 2013-07-16 | 2013-12-18 | 成都新洲航空设备有限责任公司 | FPGA-based aviation motor soft start system |
| CN104883045A (en) * | 2015-05-28 | 2015-09-02 | 株洲变流技术国家工程研究中心有限公司 | Switch power supply soft start circuit and switch power supply soft start method |
| CN205178924U (en) * | 2015-10-28 | 2016-04-20 | 大力电工襄阳股份有限公司 | Soft starting drive the main control unit of SFC static synchronous frequency conversion of high pressure |
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| CN106841964A (en) | 2017-06-13 |
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