CN208314064U - A kind of digital power output voltage over-voltage self testing circuit - Google Patents
A kind of digital power output voltage over-voltage self testing circuit Download PDFInfo
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- CN208314064U CN208314064U CN201820894925.9U CN201820894925U CN208314064U CN 208314064 U CN208314064 U CN 208314064U CN 201820894925 U CN201820894925 U CN 201820894925U CN 208314064 U CN208314064 U CN 208314064U
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Abstract
The utility model discloses a kind of digital power output voltage over-voltage self testing circuits, are related to digital power detection field, its key points of the technical solution are that: including voltage acquisition unit, digital power is coupled to receive output voltage and be converted to voltage signal；Voltage detection unit is coupled to voltage acquisition unit to receive voltage signal and export comparison signal；Status display unit is coupled to voltage detection unit to receive comparison signal and carry out display of waking up；Status display unit includes: stroboscopic module, for receiving low level comparison signal to realize that stroboscopic prompts；Light emitting module, for receiving the comparison signal of high level to realize luminous prompting；Pass through setting stroboscopic module and light emitting module; it can be carried out the mode clearly prompted to digital power lower than overvoltage protection value and arrival or higher than overvoltage protection value respectively; be conducive to more convenient, accurately prompting staff's digital power output voltage situation, and then digital power can be controlled in time.
Description
Technical field
The utility model relates to digital power detection field, in particular to a kind of digital power output voltage over-voltage self-test
Circuit.
Background technique
In the prior art to increase the reliability of power supply in use, power supply will do it indices test, and defeated
Overvoltage protection is important one of test index out.
Existing electric power output voltage over-voltage self testing circuit is as shown in Figure 1, include power module 1 and test module 2, electricity
Source module 1 includes digital power control chip 11, overvoltage crowbar 12 and first state display circuit 13, test module 2
Including testing enabled circuit 21, the second status display circuit 22, resistance is connected on the AN0 foot of digital power control chip 11
R1, R2 are connected with resistance R5, R6 on AN1 foot, resistance R3, resistance R4 and triode Q1 are connected on RB0 foot, wherein resistance
R1, R2, resistance R5, R6 are connected in series between output voltage Vout and GND；Overvoltage crowbar 12 is connected on RB1 foot,
First state display circuit 13 is first connected on RB2 foot, first state display circuit 13 reconnects the second state in test module 2
Display circuit 22, connecting test enables circuit 21 on INT0 foot.
When above-mentioned circuit starts to detect work, the test in test module 2 enables the test of 21 output over-voltage protection of circuit
Signal, after digital power controls the reception test signal of chip 11, RB0 exports high level, so that Q1 is entered saturation state, drags down resistance
The feedback voltage at the both ends R2 gradually rises digital power output voltage, when RB1 detects output voltage input overvoltage protection electricity
After road 12 works, converter is turned off, while reading the value of output voltage by AN1, this value is exactly output voltage overvoltage protection
Value, the value of output voltage send working condition to the second status display circuit 22 by RB2 and are shown；This test circuit is only
Simple displaying could be carried out in the second status display circuit 22 when the value of output voltage reaches overvoltage protection value by having, and low
It not will do it display in overvoltage protection value, cause staff that can not accurately learn the working condition of power supply.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of digital power output voltage mistakes
Self testing circuit is pressed, so that no matter the output voltage of digital power can clearly be mentioned whether there is or not overvoltage protection value is reached
Show, is conducive to the working condition that staff accurately learns digital power.
The above-mentioned technical purpose of the utility model has the technical scheme that a kind of digital power output
Electric voltage over press self testing circuit, comprising:
Voltage acquisition unit is coupled to digital power to receive output voltage and be converted to voltage signal；
Voltage detection unit is coupled to voltage acquisition unit to receive voltage signal and export comparison signal；
The voltage detection unit includes comparison circuit, reference circuit；
The comparison circuit is coupled to voltage acquisition unit to receive voltage signal and export comparison signal, and the benchmark is electric
Road is used to provide upper voltage limit signal, i.e. overvoltage protection value to comparison circuit；
Status display unit is coupled to the comparison circuit to receive comparison signal and mention in response to comparison signal to realize
It wakes up and shows；
The status display unit includes:
Stroboscopic module, for receiving low level comparison signal and in response to low level comparison signal to realize that stroboscopic mentions
Show；
Light emitting module is mentioned for receiving the comparison signal of high level and realizing to shine in response to the comparison signal of high level
Show.
When voltage signal is less than upper voltage limit signal, comparison circuit exports low level comparison signal, triggers stroboscopic mould
Block realizes stroboscopic prompt；When voltage signal is greater than upper voltage limit signal, comparison circuit exports the comparison signal of high level, touching
It sends out light emitting module and realizes luminous prompting.
Through the above technical solutions, reference circuit can be passed through when the output voltage to digital power carries out over-voltage test
Overvoltage protection value is set, the output voltage of digital power is converted voltage signal, voltage detecting by voltage acquisition unit
Unit can receive voltage signal, and the comparison of detection judgement output high level is carried out according to the overvoltage protection value that reference circuit is set
Signal or low level detection signal, if exporting low level comparison signal indicates that the output voltage of digital power is not up to
Overvoltage protection value, if the comparison signal of output high level indicates that the output voltage of digital power meets or exceeds overvoltage protection
Value；If status display unit receives low level comparison signal at this time, triggering stroboscopic module carries out the prompt of discontinuous stroboscopic, if connecing
The comparison signal of high level is received, triggering light emitting module carries out duration luminous prompting；Above-mentioned this condition prompting unit passes through
Stroboscopic module and light emitting module, respectively to digital power lower than overvoltage protection value and reach or be higher than overvoltage protection value can be into
The mode that row clearly prompts, is conducive to the output voltage situation for more easily reminding staff's digital power, and then can be right
Digital power is controlled in time.
Preferably, the stroboscopic module includes logic circuit, RC oscillating circuit and the first light emitting diode；
The logic circuits coupled is in comparison circuit and receives comparison signal, only when comparison signal is low level, logic
Circuit output oscillator signal, the RC oscillating circuit receive oscillator signal and are converted to enabling signal, first light-emitting diodes
Pipe receives enabling signal and carries out discontinuous in response to enabling signal and shines.
Through the above technical solutions, logic circuit can export vibration after logic circuit receives low level comparison signal
Signal is swung, after RC oscillating circuit receives oscillator signal at this time, discontinuous can be carried out by the first light emitting diode and shone, to mention
Staff's digital power of waking up is not up to overvoltage protection value.
Preferably, the logic circuit is not circuit.
Through the above technical solutions, when receiving low level comparison signal, not circuit can relatively be believed low level
It number is converted into the oscillator signal output of high level, otherwise receives the comparison signal of high level, low level oscillation can be converted into
Signal output.
Preferably, the amplifying circuit for amplifying oscillator signal is equipped between the not circuit and RC oscillating circuit.
Through the above technical solutions, when low level comparison signal is by the oscillator signal of not circuit output high level
When, amplifying circuit can amplify oscillator signal to be easier to drive RC oscillating circuit.
Preferably, it is equipped between the amplifying circuit and RC oscillating circuit for removing interference signal in amplification oscillator signal
Filter circuit.
Through the above technical solutions, filter circuit can remove in oscillator signal after the oscillator signal output of high level
Interference signal is to obtain more stable signal, in case interference signal influences the transmitting of normal signal.
Preferably, the light emitting module includes being coupled to the comparison circuit to receive comparison signal and in response to comparing letter
Number with the luminous prompting circuit of luminous prompting；Only when comparison signal is high level, luminous prompting circuit starts luminous prompting.
Through the above technical solutions, when voltage detection unit detects that voltage signal has reached overvoltage protection value, than
Compared with the comparison signal of circuit output high level, so that luminous prompting circuit works, to carry out luminescence display, staff's number is prompted
Word power supply has reached overvoltage protection range.
Preferably, the status display unit further include be coupled to the comparison circuit with receive comparison signal and in response to
Comparison signal is with the sound production prompt circuit of sound production prompt；Only when comparison signal is high level, sound production prompt circuit starts sounding
Prompt.
Through the above technical solutions, increasing sound production prompt on the basis of luminous prompting, it is easier to cause staff's
Pay attention to.
Preferably, further include shutdown unit, be coupled to voltage detection unit to receive comparison signal and in response to comparing letter
Number to realize the shutdown of converter.
Through the above technical solutions, being closed when voltage detection unit detects that voltage signal has reached overvoltage protection value
Disconnected unit receives the comparison signal of high level to cut off in time to the route of converter.
Preferably, the shutdown unit includes being coupled to voltage detection unit to receive comparison signal and output switching signal
Automatic switching circuit, be coupled to the automatic switching circuit to receive switching signal and turn off transformation in response to switching signal
The control circuit of device；Only when the comparison signal of output is high level, the control circuit disconnects the route of power supply and converter.
Through the above technical solutions, after turning off the comparison signal of unit reception high level, automatic switching circuit closure, into
And control circuit is cut off the power the circuit connection with converter, avoid converter from bearing overtension and destroyed.
In conclusion the utility model having the beneficial effect that in contrast to the prior art
The stroboscopic module and be arranged to number that overvoltage protection value is clearly prompted are lower than to digital power by being arranged
Power supply reaches or higher than the light emitting module that overvoltage protection value is clearly prompted, be conducive to it is more convenient, accurately remind work
The output voltage situation of personnel's digital power, and then digital power can be controlled in time.
Detailed description of the invention
Fig. 1 is the circuit structure diagram of existing power supply output voltage over-voltage self testing circuit, has power supply defeated for emphasis displaying
The circuit structure of electric voltage over press self testing circuit out；
Fig. 2 is the circuit diagram of embodiment, and the circuit theory of embodiment is shown for emphasis；
Fig. 3 is the circuit structure diagram of embodiment, and the circuit structure of embodiment is shown for emphasis；
Fig. 4 is the circuit structure diagram of stroboscopic module, and the circuit structure of stroboscopic module is shown for emphasis.
Appended drawing reference: 1, power module；11, digital power controls chip；12, overvoltage crowbar；13, first state is aobvious
Show circuit；2, test module；21, enabled circuit is tested；22, the second status display circuit；3, voltage acquisition unit；31, Hall
Voltage sensor；4, voltage detection unit；41, comparison circuit；42, reference circuit；5, status display unit；51, stroboscopic module；
511, logic circuit；512, RC oscillating circuit；52, light emitting module；521, luminous prompting circuit；53, sound production prompt circuit；6, it puts
Big circuit；7, filter circuit；8, unit is turned off；81, automatic switching circuit；82, control circuit.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Referring to fig. 2, Fig. 3, a kind of digital power output voltage over-voltage self testing circuit, including voltage acquisition unit 3, voltage
Detection unit 4, status display unit 5.
Voltage acquisition unit 3 includes Hall voltage sensor 31,31 model CHVS-AS3.3- of Hall voltage sensor
05, Hall voltage sensor 31 is coupled to digital power to receive the output voltage of physical quantity and be converted to voltage signal v0.
Voltage detection unit 4 includes comparison circuit 41, reference circuit 42, and comparison circuit 41 is coupled to Hall voltage sensor
31 to receive voltage signal v0 and export comparison signal v1, and reference circuit 42 is used to provide upper voltage limit letter to comparison circuit 41
Number, upper voltage limit signal is overvoltage protection value.
Comparison circuit 41 includes resistance R7, comparator A1, the model LM311 of comparator A1, the in-phase end of comparator A1
Hall voltage sensor 31 is coupled to by resistance R7 to receive voltage signal v0, and the reverse side of comparator A1 is coupled to benchmark electricity
Road 42；Reference circuit 42 includes resistance R8 and potentiometer Rp1, the model 3296X-502 of potentiometer Rp1, one end of resistance R8
It is coupled to Vcc voltage, the other end is coupled to the reverse side and potentiometer Rp1 of comparator A1, another termination of potentiometer Rp1
Ground；Tie point between resistance R8 and potentiometer Rp1 provides upper limit signal Vref1, by adjust potentiometer Rp1 it is adjustable on
Limit the size of signal Vref1.When the voltage signal v0 that Hall voltage sensor 31 exports reaches overvoltage protection value, comparator A1
Output end output high level comparison signal v1, conversely, then exporting low level comparison signal v1.
Referring to Fig. 3, Fig. 4, status display unit 5 be coupled to voltage detection unit 4 with receive comparison signal v1 and in response to
Comparison signal v1 reminds display to realize；Status display unit 5 includes stroboscopic module 51, light emitting module 52, and stroboscopic module 51 is used
In receiving low level comparison signal v1 and realizing that stroboscopic is prompted in response to low level comparison signal v1, light emitting module 52 is used for
Receive high level comparison signal v1 and in response to high level comparison signal v1 to realize luminous prompting.
Stroboscopic module 51 includes logic circuit 511, amplifying circuit 6, filter circuit 7, RC oscillating circuit 512 and the first hair
Optical diode D1；Logic circuit 511 is not circuit, and not circuit includes inverter ic 1, and inverter ic 1 compares for switching
Believe the low and high level of v1, the model SN74LVC1G04 of inverter ic 1；The input terminal of inverter ic 1 is coupled to comparison circuit 41
And comparison signal v1 is received, output end is coupled to amplifying circuit 6.
Amplifying circuit 6 is used to amplify the comparison signal v1 after the switching of inverter ic 1 to be easier to drive subsequent electricity
Road, amplifying circuit 6 include amplifier IC2, resistance R10, R11, the same phase of the model LM324 of amplifier IC2, amplifier IC2
End is coupled to the output end of inverter ic 1, and reverse side is coupled to one end of resistance R10, the other end ground connection of resistance R10, amplification
Series resistance R11 between the reverse side and output end of device IC2, the output end of amplifier IC2 are further coupled to filter circuit 7.
Filter circuit 7 is used to remove to obtain more stably comparison signal v1 for the interference signal in comparison signal v1, filters
Circuit 7 is filtered using RC, including resistance R12, capacitor C3, one end of capacitor C3 are coupled to the output end of amplifier IC2, the other end
Ground connection, one end of resistance R12 are equally coupled to the output end of amplifier IC2, and the other end is coupled to RC oscillating circuit 512.
RC oscillating circuit 512 includes resistance R13,14,15,16, capacitor C1, C2 and comparator A2, the type of comparator A2
It number is LM311, one end of resistance R13 and R15 is electrically connected to the output end of comparator A1, and the other end of resistance R13 is electrically connected to
The first end of capacitor C1, the second end of capacitor C1 are electrically connected to the first end of one end of resistance R14, capacitor C2, and resistance R14's is another
The second end of one end and capacitor C2 are grounded, and the second end of capacitor C1, the other end of resistance R15 are also electrically coupled to the same of comparator A2
The backward end of Xiang Duan, comparator A2 are grounded by resistance R16, and the output end of comparator A2 is electrically connected to the first light emitting diode D1
Anode tap, the cathode terminal of the first light emitting diode D1 is grounded by resistance R17.
When comparison circuit 41 exports low level comparison signal v1, inverter ic 1 cuts low level comparison signal v1
It is changed to the comparison signal v1 of high level, and by the amplification of amplifier IC2, is converted to oscillator signal after the filtering of filter circuit 7
V2, RC oscillating circuit 512 receives oscillator signal v2 and is converted to enabling signal v3, and the first light emitting diode D1 receives enabling signal
V3 simultaneously shines in response to enabling signal v3 progress discontinuous；When comparison circuit 41 exports the comparison signal v1 of high level, reverse phase
The comparison signal v1 of high level is switched to low level comparison signal v1 by device IC1, and the first light emitting diode D1 does not work.
Light emitting module 52 includes luminous prompting circuit 521, sound production prompt circuit 53, and luminous prompting circuit 521 is coupled to ratio
Compared with circuit 41 to receive comparison signal v1 and carry out luminous prompting in response to comparison signal v1, the same coupling of sound production prompt circuit 53
Comparison circuit 41 is connected to receive comparison signal v1 and in response to comparison signal v1 to carry out sound production prompt.
Luminous prompting circuit 521 includes the second light emitting diode D2, resistance R9, the anode tap coupling of the second light emitting diode D2
The output end of comparator A1 is connected to receive comparison signal v1, the cathode terminal of the second light emitting diode D2 is coupled to the one of resistance R9
End, the other end ground connection of resistance R9；When comparison signal v1 is high level, the second light emitting diode D2 starts long lasting for hair
Light.
Sound production prompt circuit 53 includes acoustical generator SP, and one end of acoustical generator SP is coupled to the output end of comparator A1 to receive
Comparison signal v1, other end ground connection；When comparison signal v1 is high level, acoustical generator SP starts sounding.
Test circuit further includes shutdown unit 8, and shutdown unit 8 includes being coupled to comparison circuit 41 to receive comparison signal v1
And the automatic switching circuit 81 of output switching signal v4, be coupled to automatic switching circuit 81 with receive switching signal v4 and in response to
Switching signal v4 is to turn off the control circuit 82 of converter.
Automatic switching circuit 81 realizes opening and closing, including triode Q1, resistance R18, model in response to comparison signal v1
NPN9013, the base stage of triode Q1 are coupled to the output end of comparator A1, emitter ground connection, collector coupling by resistance R18
In control circuit 82 and output switching signal v4.
Control circuit 82 includes relay K, the normally-closed contact K-1 for being controlled by relay K；One end of relay K is coupled to
The collector of triode Q1, the other end connect voltage vcc, and one end of normally-closed contact K-1 connects external power supply, and other end connection becomes
Parallel operation, the model BRT2-SS-212DM of relay K.
When the comparison signal v1 of output is high level, triode Q1 conducting, relay K is powered, so that normally-closed contact K-1
It disconnects, the circuit of converter is cut off, to protect converter.
The working principle of the present embodiment:
When needing the output voltage to digital power to carry out over-voltage test, first set on reference circuit 42 as the number
The upper voltage limit signal of word power supply overvoltage protection value；It, will be defeated after Hall voltage sensor 31 acquires the output voltage of digital power
Voltage is converted to voltage signal v0 out, and comparison circuit 41 receives voltage signal v0 and carries out voltage signal v0 and upper voltage limit signal
Compare；
If voltage signal v0 is lower than upper voltage limit signal, comparator A1 exports low level comparison signal v1, automatic switch
Circuit 81, luminous prompting circuit 521 and sound production prompt circuit 53 receive low level comparison signal v1 and do not work, and reverse phase
Device IC1 receives the comparison signal v1 that high level is switched to after low level comparison signal v1, and the comparison signal v1 of high level passes through
Oscillator signal v2, the RC oscillating circuit 512 that high level is obtained after amplifying circuit 6, filter circuit 7 receives the oscillator signal of high level
Enabling signal v3 is exported after v2 to the first light emitting diode D1, the first light emitting diode D1 carries out discontinuous strobe light emission, to mention
Show that the output voltage of staff's digital power is not up to overvoltage condition；
If voltage signal v0 is higher than upper voltage limit signal, switched to after the comparison signal v1 of the reception high level of inverter ic 1
Low level comparison signal v1, low level comparison signal v1 obtain low level vibration after amplifying circuit 6, filter circuit 7
Signal v2 is swung, RC oscillating circuit 512 does not work, and the first light emitting diode D1 does not shine；And the ratio of comparator A1 output high level
The comparison signal v1 of high level is received compared with signal v1, the second light emitting diode D2, and is started long lasting for property luminous prompting, together
When acoustical generator SP can equally receive the comparison signal v1 of high level, and sound production prompt is carried out, in order to more easily remind work
The output voltage for making the personnel digital power has reached overvoltage condition.
The above is only the exemplary embodiment of the utility model, the protection model rather than limited the present invention
It encloses, the protection scope of the utility model is determined by the attached claims.
Claims (9)
1. a kind of digital power output voltage over-voltage self testing circuit, it is characterized in that: including:
Voltage acquisition unit (3) is coupled to digital power to receive output voltage and be converted to voltage signal；
Voltage detection unit (4) is coupled to voltage acquisition unit (3) to receive voltage signal and export comparison signal；
The voltage detection unit (4) includes comparison circuit (41), reference circuit (42)；
The comparison circuit (41) is coupled to voltage acquisition unit (3) to receive voltage signal and export comparison signal, the base
Quasi- circuit (42) is used to provide upper voltage limit signal, i.e. overvoltage protection value to comparison circuit (41)；
Status display unit (5) is coupled to the comparison circuit (41) to receive comparison signal and in response to comparison signal with reality
Now remind display；
The status display unit (5) includes:
Stroboscopic module (51), for receiving low level comparison signal and in response to low level comparison signal to realize that stroboscopic mentions
Show；
Light emitting module (52) is mentioned for receiving the comparison signal of high level and realizing to shine in response to the comparison signal of high level
Show；
When voltage signal is less than upper voltage limit signal, comparison circuit (41) exports low level comparison signal, triggers stroboscopic mould
Block (51) realizes stroboscopic prompt；When voltage signal is greater than upper voltage limit signal, comparison circuit (41) exports the comparison of high level
Luminous prompting is realized in signal, triggering light emitting module (52).
2. a kind of digital power output voltage over-voltage self testing circuit according to claim 1, it is characterized in that: the stroboscopic
Module (51) includes logic circuit (511), RC oscillating circuit (512) and the first light emitting diode；
The logic circuit (511) is coupled to comparison circuit (41) and receives comparison signal, only when comparison signal is low level,
Logic circuit (511) outputting oscillation signal, the RC oscillating circuit (512) receive oscillator signal and are converted to enabling signal, institute
The first light emitting diode is stated to receive enabling signal and shine in response to enabling signal progress discontinuous.
3. a kind of digital power output voltage over-voltage self testing circuit according to claim 2, it is characterized in that: the logic
Circuit (511) is not circuit.
4. a kind of digital power output voltage over-voltage self testing circuit according to claim 3, it is characterized in that: the NOT gate
The amplifying circuit (6) for amplifying oscillator signal is equipped between circuit and RC oscillating circuit (512).
5. a kind of digital power output voltage over-voltage self testing circuit according to claim 4, it is characterized in that: the amplification
The filter circuit (7) for removing interference signal in amplification oscillator signal is equipped between circuit (6) and RC oscillating circuit (512).
6. a kind of digital power output voltage over-voltage self testing circuit according to claim 1, it is characterized in that: described shine
Module (52) includes being coupled to the comparison circuit (41) to receive comparison signal and in response to comparison signal with luminous prompting
Luminous prompting circuit (521)；Only when comparison signal is high level, luminous prompting circuit (521) starts luminous prompting.
7. a kind of digital power output voltage over-voltage self testing circuit according to claim 1, it is characterized in that: the state
Display unit (5) further includes being coupled to the comparison circuit (41) to receive comparison signal and be mentioned in response to comparison signal with sounding
The sound production prompt circuit (53) shown；Only when comparison signal is high level, sound production prompt circuit (53) starts sound production prompt.
8. a kind of digital power output voltage over-voltage self testing circuit according to claim 1, it is characterized in that: further including closing
Disconnected unit (8), are coupled to voltage detection unit (4) to receive comparison signal and realize the pass of converter in response to comparison signal
It is disconnected.
9. a kind of digital power output voltage over-voltage self testing circuit according to claim 8, it is characterized in that: the shutdown
Unit (8) includes being coupled to voltage detection unit (4) to receive the automatic switching circuit of comparison signal and output switching signal
(81), the automatic switching circuit (81) is coupled to receive switching signal and turn off the control of converter in response to switching signal
Circuit (82) processed；Only when the comparison signal of output is high level, the control circuit (82) disconnects the line of power supply and converter
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820894925.9U CN208314064U (en) | 2018-06-06 | 2018-06-06 | A kind of digital power output voltage over-voltage self testing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820894925.9U CN208314064U (en) | 2018-06-06 | 2018-06-06 | A kind of digital power output voltage over-voltage self testing circuit |
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| CN208314064U true CN208314064U (en) | 2019-01-01 |
Family
ID=64710800
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900957A (en) * | 2019-04-16 | 2019-06-18 | 上海艾为电子技术股份有限公司 | A kind of multiport chip with voltage detecting circuit |
| CN110058069A (en) * | 2019-06-05 | 2019-07-26 | 合肥工业大学 | A kind of oscillograph isolation voltage sampling system |
| CN113156205A (en) * | 2020-01-22 | 2021-07-23 | 圣邦微电子（北京）股份有限公司 | Shaping circuit, test board card and test machine |
-
2018
- 2018-06-06 CN CN201820894925.9U patent/CN208314064U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900957A (en) * | 2019-04-16 | 2019-06-18 | 上海艾为电子技术股份有限公司 | A kind of multiport chip with voltage detecting circuit |
| CN110058069A (en) * | 2019-06-05 | 2019-07-26 | 合肥工业大学 | A kind of oscillograph isolation voltage sampling system |
| CN113156205A (en) * | 2020-01-22 | 2021-07-23 | 圣邦微电子（北京）股份有限公司 | Shaping circuit, test board card and test machine |
| CN113156205B (en) * | 2020-01-22 | 2023-10-13 | 圣邦微电子（北京）股份有限公司 | Shaping circuit, test board card and test machine |
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