CN207148212U - A kind of voltage detecting circuit - Google Patents
A kind of voltage detecting circuit Download PDFInfo
- Publication number
- CN207148212U CN207148212U CN201721063314.1U CN201721063314U CN207148212U CN 207148212 U CN207148212 U CN 207148212U CN 201721063314 U CN201721063314 U CN 201721063314U CN 207148212 U CN207148212 U CN 207148212U
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- output end
- voltage
- circuit
- power supply
- voltage comparator
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Abstract
The utility model provides a kind of voltage detecting circuit, including voltage comparator 1, controlled switch, latching circuit, alarm indication circuit, accessory power supply, delay circuit, voltage comparator 2 and power supply process circuit, input and output voltage can be detected simultaneously, due to when electric supply installation, which is not powered, causes equipment under test without output, or electric supply installation is powered off when causing equipment under test power down, will not trigger alarm.There is power down again after electric supply installation power supply, alarm indication circuit not false alarm.After electric supply installation normal power supply, because equipment under test operation irregularity causes output voltage power down, such a situation can just trigger alarm.
Description
Technical field
The utility model is related to a kind of voltage detecting circuit, more particularly to being inputted with DC voltage, DC voltage it is defeated
The voltage while the circuit of detection gone out.
Background technology
Existing various equipment, to prevent the failure of early stage, can all carry out burn-in screen, for only in height after the manufacturing
The anomaly that Wen Shicai can be shown, and anomaly will not show when returning to normal temperature, problems are difficult to
Screened by typical aging method.
Existing ageing and screening method is high temperature ageing, and whether the forward and backward observation product input voltage of aging is normal, it is impossible to will
The exception detected is latched, and in ageing process, output voltage exception occurs in product, can not screen.
Existing voltage detecting circuit is the only detection to output voltage mostly, input voltage is not detected and to defeated simultaneously
Output voltage caused by entering electric voltage exception is excluded extremely.Therefore, existing voltage detecting circuit detects output voltage power down
It can not confirm that product causes extremely or abnormal electrical power supply causes.
Utility model content
Have in view of that, the technical problems to be solved in the utility model is that input and output voltage can be examined simultaneously
Survey, due to when electric supply installation, which is not powered, causes equipment under test without output, or electric supply installation power-off is when causing equipment under test power down,
Alarm will not be triggered.
The utility model also uses stand-by power supply device to be powered for voltage detecting circuit, after electric supply installation power-off, alarm signal
Number also can persistently it be shown.
The utility model can detect simultaneously to input and output voltage, because electric supply installation is abnormal, caused quilt
Measurement equipment is abnormal, will not trigger alarm.
What the utility model was achieved through the following technical solutions：
A kind of voltage detecting circuit：Including voltage comparator 1, controlled switch, latching circuit, alarm indication circuit, auxiliary
Power supply, delay circuit, voltage comparator 2 and power supply process circuit, concrete principle block diagram are shown in Fig. 1.
The input of the output end Vin connection equipment under tests of electric supply installation, the output end vo of equipment under test connect voltage ratio compared with
The input of device 1；The input of the output end V1 connection controlled switch of voltage comparator 1, the output end V3 connections of controlled switch
The input of latching circuit, the output end V2 of the control termination voltage comparator 2 of controlled switch；The output end VL of latching circuit connects
The input of display circuit taking alarm.
The output end Vin of the input connection electric supply installation of accessory power supply, the feeder ear connection accessory power supply of comparator 1
Output end VCC；The output end VCC of the input connection accessory power supply of delay circuit, the feeder ear connection auxiliary of voltage comparator 2
The output end VCC of power supply；Power supply process circuit has two terminals, the output end VCC of a terminal connection accessory power supply, and in addition one
The output end VDD of individual terminal connection stand-by power supply device；The input of the output end VC connections voltage comparator 2 of delay circuit.
Electric supply installation is that equipment under test and accessory power supply are powered, and the ground GND of equipment under test is connected with the ground of electric supply installation；Quilt
The output end vo voltage of measurement equipment is compared with the internal reference voltage of voltage comparator 1, when output end vo voltage is more than electricity
When pressing the internal reference voltage of comparator 1, the output end V1 of voltage comparator 1 is low level；When output end vo voltage is less than electricity
When pressing the internal reference voltage of comparator 1, the output end V1 of voltage comparator 1 is high level.
The output end Vin DC voltages of electric supply installation are converted to DC voltage VCC outputs by accessory power supply, meet that rear end is straight
The demand of magnitude of voltage is flowed, and is powered for voltage comparator 1, voltage comparator 2.Accessory power supply and stand-by power supply device are by power supply
DC voltage VD after processing circuit processes powers for latching circuit, and power supply process circuit realizes accessory power supply and stand-by power supply dress
The complementary influence of power supply put.
Delay circuit carries out delay process to the output end VCC voltages of accessory power supply, it is desirable to the time delay of delay circuit
More than the time delay of equipment under test.The output end VC voltages of delay circuit compared with the internal reference voltage of comparator 2, when
When the output end VC voltages of delay circuit are more than 2 internal reference voltage of voltage comparator, the output end V2 of voltage comparator 2 is height
Level；When the output end VC voltages of circuit are less than 2 internal reference voltage of voltage comparator at that time, the output end V2 of voltage comparator 2
For low level.
It is controlled to open when the output end V1 voltages and the output end V2 of voltage comparator 2 of voltage comparator 1 are simultaneously high level
Conducting is closed, the output end V3 of controlled switch is high level.The output voltage terminal V1 and voltage comparator 2 of voltage comparator 1 are exported
When being high level or be low level simultaneously when holding V2 differences, the output end V3 of controlled switch is low level.
When the output end V3 of controlled switch is high level, latching circuit is realized the output end V3 of controlled switch height electricity
It is flat to be latched, and latching circuit output end VL outputs are high level；When the output end VL of latching circuit remains continuously high
During level, alarm indication circuit is persistently alarmed；When the output end V3 of controlled switch is low level, latching circuit output end
VL outputs are low level, and alarm indication circuit is not alarmed.
Compared with prior art, the utility model has following significant effect：
1st, input and output voltage can be detected simultaneously, because electric supply installation is abnormal, caused equipment under test is different
Often, alarm will not be triggered.
2nd, circuit implementations are simple, reliable, small volume, cost are extremely low, can be largely used to the burn-in screen of equipment under test.
Brief description of the drawings
Fig. 1 is theory diagram of the present utility model；
Fig. 2 is application block diagram of the present utility model；
Fig. 3 is schematic diagram of the present utility model；
Fig. 4 is voltage detecting circuit each point voltage change sequential in first embodiment.
Embodiment
First embodiment
Fig. 1 shows theory diagram, it then follows the annexation of above-mentioned initial technical scheme, in specific first embodiment
Voltage detecting circuit each point voltage change sequential such as Fig. 4.
The utility model has following 5 features：
1st, when electric supply installation is not powered, alarm indication circuit not false alarm.
2nd, there is power down again after electric supply installation power supply, alarm indication circuit not false alarm.
3rd, after electric supply installation normal power supply, because equipment under test operation irregularity causes output voltage power down, such a situation can
It can just touch
Transmit messages police.
4th, electric supply installation normal work, stand-by power supply device do not work, and whole circuit being capable of normal work.
5th, after electric supply installation power-off, as long as stand-by power supply device normal work, alarm signal also can persistently be shown.
Voltage comparator 1 of the present utility model, controlled switch, latching circuit, alarm indication circuit, accessory power supply, delay
The specific circuit connecting relation of circuit, voltage comparator 2 and each circuit module of process circuit of powering belongs to prior art, pin
To each circuit module, using circuit in detail below, 5 features are specifically described to more than, and with reference to accompanying drawing 3 to this reality
It is described as follows with new operation principle as follows：
Voltage comparator 1 described in the utility model includes the first amplifier IC2A, the 14th resistance R14, the 15th resistance
R15, the 16th resistance R16, the 17th resistance R17, the 18th resistance R18 and the 3rd electric capacity C3.The 14th described resistance R14
It is connected between described the first amplifier IC2A output end and the input V1 of described controlled switch；The 15th described electricity
Resistance R15 is connected between output end vo and the 16th described resistance R16 of described equipment under test；The 16th described resistance
R16 is connected between the 15th described resistance R15 and the ground GND of equipment under test；The 17th described resistance R17 is connected to institute
Between the output end VCC for the accessory power supply stated and the 18th described resistance R18；The 18th described resistance R18 is connected to institute
Between the 17th resistance R17 and the ground GND of equipment under test that state；The 3rd described electric capacity C3 is connected to R14 and equipment under test
Between ground GND；IC2A normal phase input end is connected to R15 and R16 tie point, IC2A negative-phase input be connected to R17 and
R18 tie point；The output end of the ground GND of IC2A the 4th pin connection equipment under test, IC2A the 8th pin connection accessory power supply
VCC。
Controlled switch described in the utility model includes the 11st resistance R11, the 12nd resistance R12, the 13rd resistance
R13, the first PNP triode Q1, the first N-MOS pipes Q2 and the first diode D1.The 11st described resistance R11 is connected to described
The first N-MOS pipes Q2 G poles and S poles between；The 12nd described resistance R12 is connected to the D of the first described N-MOS pipes Q2
Between pole and the B poles of the first described PNP triode Q1；The 13rd described resistance R13 is connected to the E of the first PNP triode
Between pole and B poles；The first described diode D1 anodes are connected to the C poles of the first described PNP triode, and the described the 1st
The input V3 of latching circuit described in pole pipe D1 negative electrodes；The first described N-MOS pipes Q2 has three terminals, the first described N-
The output end V2 of the G poles connection voltage comparator 2 of metal-oxide-semiconductor, the equipment under test described in the S poles connection of the first described N-MOS pipes
Ground GND；The first described PNP triode Q1 has three terminals, and the E poles connection of the first described PNP triode Q1 is described
The output end V1 of comparator 1.
Latching circuit described in the utility model includes the 20th resistance R20, the 21st resistance R21, the 22nd electricity
Hinder R22, the 5th electric capacity C5, the second diode D2 and the 3rd amplifier IC3B.The 20th described resistance R20 is connected to the 3rd amplifier
Between IC3B normal phase input end and the ground GND of described equipment under test；The 5th described electric capacity C5 is connected to described the 3rd
Between amplifier IC3B normal phase input end and the ground GND of described equipment under test；The 21st described resistance R21 is connected to institute
The output end VD and the 3rd described amplifier IC3B of the power supply process circuit stated negative-phase input；The 22nd described resistance
R22 is connected between described the 3rd amplifier IC3B negative-phase input and the ground GND of described equipment under test；Described second
The output end VL of the 3rd amplifier IC3B described in diode D2 anode connection, the second described diode D2 negative electrode connection institute
The 3rd amplifier IC3B stated normal phase input end；The 3rd described amplifier IC3B has three terminals, the 3rd described amplifier IC3B
Normal phase input end connection controlled switch output end V3, the 3rd described amplifier IC3B output end connection alarm indication circuit
Input VL.The output end VCC of the ground GND of IC3B the 4th pin connection equipment under test, IC3B the 8th pin connection accessory power supply.
Alarm indication circuit described in the utility model includes the 23rd resistance R23 and the first LED.Institute
The negative electrode of the 23rd resistance R23 connections stated and first LED and the ground GND of described equipment under test it
Between；The output end VL of latching circuit described in the anode connection of the first described LED.
Delay circuit described in the utility model includes the 19th resistance R19, the 8th resistance R8 and the first electric capacity C1.It is described
The output end VCC of the 19th resistance R19 connection accessory power supplys and the input VC of voltage comparator 2；The 8th described resistance
R8 is connected to described the ground GND of equipment under test and the input VC of voltage comparator 2；The first electric capacity C1 is connected to connection
In the ground GND of the described equipment under test and input VC of voltage comparator 2.
Voltage comparator 2 described in the utility model includes the 9th resistance R9, the tenth resistance R10 and the second amplifier IC2B.
The 9th resistance R9 is connected to the output end VCC and the second amplifier IC2B negative-phase inputs of described accessory power supply；Described
Ten resistance R10 are connected to the ground GND and the second amplifier IC2B negative-phase inputs of described equipment under test；IC2B normal phase input end
Output end V2 of the output end as voltage comparator 2 as the input VC, IC2B of voltage comparator 2.IC2B the 4th pin connects
Meet the ground GND of equipment under test, the output end VCC of IC2B the 8th pin connection accessory power supply.
Accessory power supply described in the utility model include first resistor R1, the first error amplifier IC1, the 6th resistance R6 and
7th resistance R7.Described first resistor R1 is connected to output end Vin and first error amplification of described electric supply installation
Between device IC1 negative electrode；The 6th described resistance R6 is connected to the negative electrode and reference edge of the first error amplifier IC1
Between；The 7th described resistance R7 is connected to the ground GND of described equipment under test and first error amplifier
Between IC1 benchmark；Output end VCC of the IC1 negative electrode as accessory power supply.
Power supply process circuit described in the utility model includes the 3rd diode D3 and the 4th diode D4.Described the 3rd
The output end VCC, the 3rd described diode D3 of accessory power supply described in diode D3 anode connection negative electrode are as power supply
The output end VD of process circuit；The output end VDD of stand-by power supply device described in the anode connection of the 4th described diode D4,
The negative electrode of the 3rd diode D3 described in 4th diode D3 negative electrode connection.
When the electric supply installation of feature 1 is not powered, alarm indication circuit not false alarm, operation principle is realized：
In t0 to the t1 periods, the output end Vin voltages of electric supply installation are low level, the output end vo voltage of equipment under test
For low level, the output end VCC voltages of accessory power supply are low level, because the output end VCC voltages of accessory power supply are low level,
The output end V1 voltages of voltage comparator 1 are low level, and the output end VC voltages of delay circuit are low level, voltage comparator 2
Output end V2 voltages be low level, controlled switch shut-off, the output end V3 voltages of controlled switch are low level, latching circuit
Output end VL voltages are low level, and alarm indication circuit is not alarmed.
There is power down again after the power supply of the electric supply installation of feature 2, alarm indication circuit not false alarm, realize operation principle：
The output end Vin voltages of electric supply installation rise to high level at the t1 moment, in t1 to the t4 periods, remain high electricity
It is flat.
Output+Vo the voltages of equipment under test are low level, after time delay t2-t1, in t2 in t1 to the t2 periods
Moment rises to high level, in t2 to the t4 periods, remains high level.
The output end VCC voltages of accessory power supply rise to high level at the t1 moment, in t1 to the t4 periods, remain high electricity
It is flat.
The output end V1 voltages of voltage comparator 1 rise to high level at the t1 moment, in t1 to the t2 periods, remain height
Level, low level is dropped at the t2 moment, in t2 to the t4 periods, remains low level.
The output end VC voltages of delay circuit are gradually increasing at the t1 moment, in t1 to the t3 periods, the output of delay circuit
The reference voltage for holding VC voltages to be less than inside voltage comparator 2, the output end V2 voltages of voltage comparator 2 are low level, are arrived in t3
T4 periods, the output end VC voltages of delay circuit are more than the reference voltage inside voltage comparator 2, and voltage comparator 2 exports
It is high level to hold V2 voltages.During circuit design, it is desirable to which the time delay t3-t1 of delay circuit is more than the output end vo of equipment under test
The starting-up delay time t2-t1 of voltage.
In t1 to the t2 periods, because the pressure output end V2 voltages of comparator 2 are low level, controlled switch shut-off is controlled to open
The output end V3 of pass is low level.
In t2 to the t4 periods, because the pressure output end V1 voltages of comparator 1 are low level, controlled switch shut-off is controlled to open
The output end V3 of pass is low level.
Therefore, in t1 to the t4 periods, the output end V3 of controlled switch is low level, and the output end VL positions of latching circuit are low
Voltage, alarm indication circuit are not alarmed.
There is power down at the t4 moment in the output end Vin voltages of electric supply installation, drop to low level, in t4 to the t7 periods,
Remain low level.
The output end vo voltage of equipment under test remains high level, by time delay t5-t4 in t4 to the t5 periods
Afterwards, low level is dropped at the t5 moment, in t5 to the t7 periods, remains low level.
The output end VCC voltages of accessory power supply drop to low level at the t4 moment, in t4 to the t7 periods, remain high electricity
It is flat.
Because the output end VCC voltages of accessory power supply are low level, the output end V1 voltages of voltage comparator 1 are low electricity
Flat, the output end VC voltages of delay circuit are low level, and the output end V2 voltages of voltage comparator 2 are also low level, controlled to open
Shut-off, the output end V3 voltages of controlled switch are low level, and the output end VL voltages of latching circuit are low level, alarm indication
Circuit is not alarmed.
Electric supply installation can be achieved above to power normal rear and power down occur, alarm indication circuit will not false alarm.
After the electric supply installation normal power supply of feature 3, because equipment under test operation irregularity causes output voltage power down, such a situation energy
It is enough just to trigger alarm, realize operation principle：
The output end Vin voltages of electric supply installation rise to high level at the t7 moment, in t7 to the t11 periods, remain height
Level.
For the output+Vo voltages of equipment under test in t7 to the t8 periods, it is low level to remain low level, is prolonged by start
After slow time t8-t7, high level section is risen at the t8 moment, in t8 to the t10 periods, remains high level, is carved in t10
Existing power down, drops to low level, in t10 to the t11 periods, remains low level.
The output end VCC voltages of accessory power supply rise to high level at the t7 moment, in t7 to the t11 periods, remain height
Level.
The output end V1 voltages of voltage pressure comparator 1 rise to high level at the t7 moment, in t7 to the t8 periods, remain
High level, low level is dropped at the t8 moment, in t8 to the t10 periods, remains low level.
High level is risen at the t10 moment, in t10 to the t11 periods, remains high level.
The output end VC voltages of delay circuit are gradually increasing at the t7 moment, in t7 to the t9 periods, the output of delay circuit
The reference voltage for holding VC voltages to be less than inside voltage comparator 2, the output end V2 voltages of voltage comparator 2 are low level, are arrived in t9
T11 periods, the output end VC voltages of delay circuit are more than the reference voltage inside voltage comparator 2, and voltage comparator 2 exports
It is high level to hold V2 voltages.
In t7 to the t9 periods, because the pressure output end V2 voltages of comparator 2 are low level, controlled switch shut-off is controlled to open
The output end V3 of pass is low level.
In t9 to the t10 periods, because the pressure output end V1 voltages of comparator 1 are low level, controlled switch shut-off is controlled to open
The output end V3 of pass is low level, and alarm indication circuit is not alarmed.
In t10 to the t11 periods, because the output end V1 voltages of voltage comparator 1 are that high level and voltage comparator 2 export
End V2 voltages are high level, and controlled switch conducting, the output end V3 of controlled switch is high level, and alarm indication circuit is reported
It is alert.
Therefore, it is such a because equipment under test operation irregularity causes output voltage power down after electric supply installation normal power supply can be achieved
Situation can just trigger alarm.
The electric supply installation normal work of feature 4, stand-by power supply device do not work, whole circuit can normal work, realize work
Make principle：
Electric supply installation normal work, when stand-by power supply device does not work, the output end VCC voltages of accessory power supply are high electricity
Flat, the output end VD voltages after process circuit of powering also are high level, it is ensured that whole circuit normal work.
After the power-off of the electric supply installation of feature 5, as long as stand-by power supply device normal work, alarm signal can persistently be shown,
Realize operation principle：
When the output end V3 voltages of controlled switch are high level, stand-by power supply device normal work, handled by power supply
Output end VD voltages after circuit are also high level, can be that latching circuit is powered, latching circuit output is high level, alarm signal
Can persistently it be shown.
The first described PNP triodes and the first described N-MOS pipes realize the function of controlled switch, described first
PNP triodes, which can be changed to P-MOS pipes or relay, the first N-MOS pipes, can be changed to NPN triodes, can also realize the reality
It is functional with new institute.
It the above is only preferred embodiment of the present utility model, it is noted that above-mentioned preferred embodiment should not regard
For to limitation of the present utility model, on the basis of the utility model Fig. 1 theory diagrams, for the ordinary skill of the art
For personnel, do not departing from spirit and scope of the present utility model, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model, no longer be repeated here with embodiment, and the scope of protection of the utility model should
It is defined when by claim limited range.
Claims (7)
- A kind of 1. voltage detecting circuit, it is characterised in that：Including voltage comparator 1, controlled switch, latching circuit, alarm indication Circuit, accessory power supply, delay circuit, voltage comparator 2 and power supply process circuit；The input of the output end Vin connection equipment under tests of electric supply installation, the output end vo of equipment under test connect voltage comparator 1 Input；The input of the output end V1 connection controlled switch of voltage comparator 1, the output end V3 connections self-locking electricity of controlled switch The input on road, the output end V2 of the control termination voltage comparator 2 of controlled switch；The output end VL connections alarm of latching circuit The input of display circuit；The output end Vin of the input connection electric supply installation of accessory power supply, the output of the feeder ear connection accessory power supply of comparator 1 Hold VCC；The output end VCC of the input connection accessory power supply of delay circuit, the feeder ear connection accessory power supply of voltage comparator 2 Output end VCC；Power supply process circuit has two terminals, the output end VCC of a terminal connection accessory power supply, another end The output end VDD of son connection stand-by power supply device；The input of the output end VC connections voltage comparator 2 of delay circuit.
- A kind of 2. voltage detecting circuit according to claim 1, it is characterised in that：The electric supply installation be equipment under test and Accessory power supply is powered, and the ground GND of equipment under test is connected with the ground of electric supply installation；The output end vo voltage and voltage ratio of equipment under test Internal reference voltage compared with device 1 is compared, when output end vo voltage is more than the internal reference voltage of voltage comparator 1, electricity The output end V1 for pressing comparator 1 is low level；When output end vo voltage is less than the internal reference voltage of voltage comparator 1, electricity The output end V1 for pressing comparator 1 is high level.
- A kind of 3. voltage detecting circuit according to claim 2, it is characterised in that：The accessory power supply is by electric supply installation DC voltage Vin is converted to DC voltage VCC, and is powered for voltage comparator 1, voltage comparator 2；Accessory power supply and standby confession DC voltage VD of the electric installation after processing circuit processes of powering powers for latching circuit, and power supply process circuit realizes auxiliary electricity The power supply in source and stand-by power supply device is independent of each other.
- A kind of 4. voltage detecting circuit according to claim 3, it is characterised in that：The delay circuit is to accessory power supply Output end VCC voltages carry out delay process, and the time delay of the delay circuit is more than the time delay of equipment under test.
- A kind of 5. voltage detecting circuit according to claim 4, it is characterised in that：The output end VC electricity of the delay circuit Pressure is compared with the internal reference voltage of voltage comparator 2, when the output end VC voltages of delay circuit are more than in voltage comparator 2 During portion's reference voltage, the output end V2 of voltage comparator 2 is high level；At that time the output end VC voltages of circuit be less than voltage ratio compared with During 2 internal reference voltage of device, the output end V2 of voltage comparator 2 is low level.
- A kind of 6. voltage detecting circuit according to claim 5, it is characterised in that：As the output end V1 of voltage comparator 1 When voltage and the output end V2 voltages of voltage comparator 2 are simultaneously high level, controlled switch turns on, and the output end V3 of controlled switch is High level；It is high level when the output voltage terminal V1 of voltage comparator 1 and 2 output end V2 differences of voltage comparator or is low simultaneously During level, the output end V3 of controlled switch is low level.
- A kind of 7. voltage detecting circuit according to claim 6, it is characterised in that：When the output end V3 of controlled switch is height During level, latching circuit is realized and is latched the output end V3 of controlled switch high level, and latching circuit output end VL Export as high level；When the output end VL of latching circuit remains continuously high level, alarm indication circuit is persistently alarmed； When the output end V3 of controlled switch is low level, latching circuit output end VL outputs are low level, and alarm indication circuit is not reported It is alert.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721063314.1U CN207148212U (en) | 2017-08-24 | 2017-08-24 | A kind of voltage detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721063314.1U CN207148212U (en) | 2017-08-24 | 2017-08-24 | A kind of voltage detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207148212U true CN207148212U (en) | 2018-03-27 |
Family
ID=61669637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721063314.1U Withdrawn - After Issue CN207148212U (en) | 2017-08-24 | 2017-08-24 | A kind of voltage detecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207148212U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478895A (en) * | 2017-08-24 | 2017-12-15 | 广州金升阳科技有限公司 | A kind of voltage detecting circuit |
-
2017
- 2017-08-24 CN CN201721063314.1U patent/CN207148212U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478895A (en) * | 2017-08-24 | 2017-12-15 | 广州金升阳科技有限公司 | A kind of voltage detecting circuit |
| CN107478895B (en) * | 2017-08-24 | 2023-08-11 | 广州金升阳科技有限公司 | Voltage detection circuit |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180327 Effective date of abandoning: 20230811 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180327 Effective date of abandoning: 20230811 |