CN206773141U - A kind of circuit checker - Google Patents
A kind of circuit checker Download PDFInfo
- Publication number
- CN206773141U CN206773141U CN201720300311.9U CN201720300311U CN206773141U CN 206773141 U CN206773141 U CN 206773141U CN 201720300311 U CN201720300311 U CN 201720300311U CN 206773141 U CN206773141 U CN 206773141U
- Authority
- CN
- China
- Prior art keywords
- circuit
- comparator
- signal output
- voltage detection
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a kind of circuit checker, including circuit power supply, voltage detection comparator, comparator power supply, none-inverting input circuits, anti-phase input circuit and level signal output circuit, the none-inverting input circuits connect the in-phase input end of the voltage detection comparator, the anti-phase input circuit connects the inverting input of the voltage detection comparator, the power connector end of the voltage detection comparator is connected after the circuit power supply and the comparator power supply parallel connection, the level signal output circuit connects the signal output part of the voltage detection comparator；And connected between the signal output part and in-phase input end of the voltage detection comparator by positive feedback resistor, connected between the signal output part and inverting input of the voltage detection comparator by comparator inversion capacitance.The utility model have circuit structure compared with simplify, manufacturing cost is relatively low the advantages of, and circuit stability and good reliability.
Description
Technical field
It the utility model is related to a kind of monitoring and protecting circuit product technical field, particularly a kind of circuit checker.
Background technology
Conventional circuit power supply protection circuit, is mainly realized to power supply by monitoring the fluctuation of supply voltage in real time
Control and protection to power circuit, avoid due to overtension or the too low damage for causing circuit components.Prior art
In circuit checker usually require to set two sets decision circuitries, that is, be used to detecting the overvoltage comparison circuits of too high voltages with
The under-voltage comparison circuit of low-voltage is crossed, to carry out the monitoring of supply voltage and send protection operating control signal；It is but above-mentioned
Conventional circuit checker has the deficiency that circuit structure is more complicated, manufacturing cost is higher, and conventional circuit checker
Its circuit stability and reliability are up for further improving.
The content of the invention
For overcome the deficiencies in the prior art, the utility model provides a kind of circuit checker, has circuit structure
Compared with simplify, manufacturing cost is relatively low the advantages of, and circuit stability and good reliability.
Technical scheme is used by the utility model solves its technical problem：
A kind of circuit checker, including circuit power supply, voltage detection comparator, comparator power supply, same to phase
Input circuit, anti-phase input circuit and level signal output circuit, the none-inverting input circuits connect the voltage detecting ratio
Compared with the in-phase input end of device, the anti-phase input circuit connects the inverting input of the voltage detection comparator, the circuit
The power connector end of the voltage detection comparator, the level are connected after power supply and the comparator power supply parallel connection
Signal output apparatus connects the signal output part of the voltage detection comparator, the grounding connection end of the voltage detection comparator
Connect common ground end；And the homophase input of the signal output part of the voltage detection comparator and the voltage detection comparator
Connected between end by positive feedback resistor, the signal output part of the voltage detection comparator and the voltage detection comparator
Connected between inverting input by comparator inversion capacitance.
As the further improvement of above-mentioned technical proposal, the none-inverting input circuits include the first over-pressed detection resistance, mistake
Pressure detection diode, overvoltage detection electric capacity and the second over-pressed detection resistance, the first over-pressed detection resistance and the overvoltage inspection
Diodes in parallel is surveyed, the overvoltage detection electric capacity and the second over-pressed detection resistance are in parallel, the first over-pressed detection resistance
And the second over-pressed detection resistance is sequentially connected in series and is connected between the circuit power supply and common ground end.
As the further improvement of above-mentioned technical proposal, the anti-phase input circuit includes being sequentially connected in series to be supplied in the circuit
First under-voltage detection resistance and the second under-voltage detection resistance between power supply and common ground end.
As the further improvement of above-mentioned technical proposal, the signal that the level signal output circuit includes being arranged in parallel is defeated
Go out diode, signal output resistance, the signal output diode connects the signal output part of the voltage detection comparator, institute
The one end for stating signal output resistance connects the comparator power supply, and the other end of the signal output resistance connects the electricity
Press the signal output part of detection comparator.
Compared with prior art, the beneficial effects of the utility model are：
A kind of circuit checker provided by the utility model, have circuit structure compared with simplify, manufacturing cost it is relatively low
Advantage, and circuit stability and good reliability.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is a kind of structural representation of circuit checker described in the utility model.
Embodiment
Reference picture 1, Fig. 1 are the structural representations of one specific embodiment of the utility model.
As shown in figure 1, a kind of circuit checker, including circuit power supply U1, voltage detection comparator IC, comparator
Power supply U2, none-inverting input circuits, anti-phase input circuit and level signal output circuit, the none-inverting input circuits connection
The in-phase input end of the voltage detection comparator IC, the anti-phase input circuit connect the anti-of the voltage detection comparator IC
The voltage detection comparator is connected after phase input, the circuit power supply U1 and the comparator power supply U2 parallel connections
IC power connector end, the level signal output circuit connects the signal output part of the voltage detection comparator IC, described
Voltage detection comparator IC grounding connection end connection common ground end G；And the signal output of the voltage detection comparator IC
Connected between end and the in-phase input end of the voltage detection comparator IC by positive feedback resistor R5, the voltage detecting compares
Connected between device IC signal output part and the voltage detection comparator IC inverting input by comparator inversion capacitance C2
Connect.
Specifically, the none-inverting input circuits include the first over-pressed detection resistance R1, overvoltage detection diode D1, overvoltage inspection
Survey electric capacity C1 and second over-pressed detection resistance R2, the first over-pressed detection resistance R1 and the overvoltage detection diode D1 simultaneously
Connection, the overvoltage detection electric capacity C1 and the second over-pressed detection resistance R2 are in parallel, the first over-pressed detection resistance R1 and institute
The second over-pressed detection resistance R2 is stated to be sequentially connected in series and be connected between the circuit power supply U1 and common ground end G.It is described
Anti-phase input circuit includes being sequentially connected in series the first under-voltage detection resistance between the circuit power supply U1 and common ground end G
R3 and second is under-voltage detection resistance R4.The level signal output circuit includes signal output diode D2, the letter being arranged in parallel
Number output resistance R6, the signal output part of the signal output diode D2 connections voltage detection comparator IC, the letter
Number output resistance R6 one end connects the comparator power supply U2, described in the other end connection of the signal output resistance R6
Voltage detection comparator IC signal output part.
When overtension, for the overvoltage detection diode D1 conductings of control threshold, so that default described
The input voltage of voltage detection comparator IC inverting inputs is more than the input voltage of normal phase input end, and the voltage detecting compares
Thus device IC exports high level signal so as to cut off circuit power supply；And when brownout, directly make the default voltage inspection
The input voltage for surveying comparator IC inverting inputs is more than the input voltage of normal phase input end, and the voltage detection comparator IC is same
When can also export high level signal so as to cut off circuit power supply.In order that circuit power supply protection circuit has automatic decision power supply electricity
Source recovery situation, and the function of circuit power supply can be reclosed automatically, be also provided with comparator circuit for reversing, i.e., it is described positive and negative
The feed resistance R5 and comparator inversion capacitance C2, when the voltage is in threshold range, the voltage detection comparator IC meetings
Output high level signal is powered so as to restart circuit.
Above to it is of the present utility model preferably implement illustrated, certainly, the utility model can also use with
The different form of above-mentioned embodiment, those skilled in the art are made on the premise of without prejudice to the utility model spirit
Equivalent conversion or corresponding change, should all belong in the scope of protection of the utility model.
Claims (4)
- A kind of 1. circuit checker, it is characterised in that：Including circuit power supply, voltage detection comparator, comparator power supply Power supply, none-inverting input circuits, anti-phase input circuit and level signal output circuit, the none-inverting input circuits connect the electricity The in-phase input end of detection comparator is pressed, the anti-phase input circuit connects the inverting input of the voltage detection comparator, The power connector end of the voltage detection comparator is connected after the circuit power supply and the comparator power supply parallel connection, The level signal output circuit connects the signal output part of the voltage detection comparator, and the voltage detection comparator connects Ground connection end connection common ground end；And the signal output part of the voltage detection comparator and the voltage detection comparator Connected between in-phase input end by positive feedback resistor, the signal output part of the voltage detection comparator and the voltage detecting Connected between the inverting input of comparator by comparator inversion capacitance.
- A kind of 2. circuit checker according to claim 1, it is characterised in that：The none-inverting input circuits include first Over-pressed detection resistance, overvoltage detection diode, overvoltage detection electric capacity and the second over-pressed detection resistance, the first overvoltage detection electricity Resistance and the overvoltage detect diodes in parallel, and the overvoltage detection electric capacity and the second over-pressed detection resistance are in parallel, and described the One over-pressed detection resistance and the second over-pressed detection resistance are sequentially connected in series and are connected to the circuit power supply and public connect Between ground terminal.
- A kind of 3. circuit checker according to claim 1, it is characterised in that：The anti-phase input circuit is included successively It is connected on the first under-voltage detection resistance and the second under-voltage detection resistance between the circuit power supply and common ground end.
- A kind of 4. circuit checker according to claim 1, it is characterised in that：The level signal output circuit includes Signal output diode, the signal output resistance being arranged in parallel, the signal output diode connect the voltage detecting and compared The signal output part of device, one end of the signal output resistance connect the comparator power supply, the signal output resistance The other end connect the signal output part of the voltage detection comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720300311.9U CN206773141U (en) | 2017-03-27 | 2017-03-27 | A kind of circuit checker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720300311.9U CN206773141U (en) | 2017-03-27 | 2017-03-27 | A kind of circuit checker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206773141U true CN206773141U (en) | 2017-12-19 |
Family
ID=60633719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720300311.9U Expired - Fee Related CN206773141U (en) | 2017-03-27 | 2017-03-27 | A kind of circuit checker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206773141U (en) |
-
2017
- 2017-03-27 CN CN201720300311.9U patent/CN206773141U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171219 Termination date: 20200327 |