CN209299234U - A kind of gating protection circuit - Google Patents
A kind of gating protection circuit Download PDFInfo
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- CN209299234U CN209299234U CN201821919853.5U CN201821919853U CN209299234U CN 209299234 U CN209299234 U CN 209299234U CN 201821919853 U CN201821919853 U CN 201821919853U CN 209299234 U CN209299234 U CN 209299234U
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- output end
- control circuit
- optocoupler
- gating
- npn triode
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Abstract
The utility model relates to a kind of gatings to protect circuit; it include: first control circuit; the input terminal of first control circuit is connect with the output end of the first signal source; second control circuit; the input terminal of second control circuit is connect with the output end in second signal source; the anode of first optocoupler, the photophore of the first optocoupler is connect with the output end of first control circuit, and the cathode of the photophore of the first optocoupler is connect with the output end in second signal source；External first gating circuit of the light-receiving device of first optocoupler；And second optocoupler, the anode of the photophore of the second optocoupler are connect with the output end of first control circuit, the output end connection of the cathode and second control circuit of the photophore of the second optocoupler；External second gating circuit of the light-receiving device of second optocoupler.What kind of level false triggering no matter the utility model occur, as soon as the first optocoupler and the second optocoupler can only all be connected, the first gating circuit and the second gating circuit can only also be connected one, ensure that the safety of equipment in gating circuit.
Description
Technical field
The utility model relates to electronic circuit technology field, in particular to a kind of gating protects circuit.
Background technique
Some gating circuits are often used in circuit design process, occur accidentally touching when gating for common product
Hair is not will cause serious consequence, such as (electric in BMS however for the vehicle-mounted product either high product of security requirement
Pond management system) battery selection in balancing procedure, during carrying out charge and discharge to it, if false triggering occur may make
At battery short circuit, fire can be even caused when serious.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of gatings to protect circuit, to overcome the above-mentioned prior art
In deficiency.
The technical solution that the utility model solves above-mentioned technical problem is as follows: a kind of gating protection circuit, comprising:
First control circuit, the input terminal of first control circuit are connect with the output end of the first signal source, and when the first letter
When the output end in number source is high level, the output end of first control circuit is high level；When the output end of the first signal source is low
When level, the output end of first control circuit is without output；
The input terminal of second control circuit, second control circuit is connect with the output end in second signal source, and when the second letter
When the output end in number source is high level, the output end of second control circuit is low level；When the output end in second signal source is low
When level, the output end of second control circuit is without output；
The anode of first optocoupler, the photophore of the first optocoupler is connect with the output end of first control circuit, the first optocoupler
The cathode of photophore is connect with the output end in second signal source；External first gating circuit of the light-receiving device of first optocoupler；And
The anode of second optocoupler, the photophore of the second optocoupler is connect with the output end of first control circuit, the second optocoupler
The cathode of photophore and the output end of second control circuit connect；External second gating circuit of the light-receiving device of second optocoupler.
The beneficial effects of the utility model are: no matter there is what kind of level false triggering, the first optocoupler and the second optocoupler are all
As soon as can only be connected, in this case the first gating circuit and the second gating circuit can only also be connected one, ensure that gating electricity
The safety of equipment in road.
Further, first control circuit includes the first NPN triode, the base stage of the first NPN triode is the first control electricity
The input terminal on road, the output end of the transmitting extremely first control circuit of the first NPN triode；The collector of first NPN triode
It is connected with power supply；
Second control circuit includes the second NPN triode, and the base stage of the second NPN triode is the input of second control circuit
End, the output end of the current collection of the second NPN triode extremely second control circuit；The emitter of second NPN triode is grounded.
Further, being connect after the source-series first resistor of the first signal with the base stage of the first NPN triode.
Further, being grounded after the base series second resistance of the first NPN triode.
Further, being connected to power supply after the collector series connection 3rd resistor of the first NPN triode.
Further, being connect after source-series 4th resistance of second signal with the base stage of the second NPN triode.
Further, being grounded after the 5th resistance of base series of the second NPN triode.
Further, first control circuit includes the first N-channel MOS pipe, the grid of the first N-channel MOS pipe is the first control
The input terminal of circuit, the source electrode of the first N-channel MOS pipe are the output end of first control circuit；The drain electrode of first N-channel MOS pipe
It is connected with power supply；
Second control circuit includes the second N-channel MOS pipe, and the grid of the second N-channel MOS pipe is the defeated of second control circuit
Enter end, the drain electrode of the second N-channel MOS pipe is the output end of second control circuit；The source electrode of second N-channel MOS pipe is grounded.
Detailed description of the invention
Fig. 1 is that a kind of gating of the utility model protects first control circuit and second control circuit in circuit to be selected as NPN
Circuit diagram when triode.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
As shown in Figure 1, a kind of gating of the utility model embodiment 1 protects circuit, comprising:
First control circuit, the input terminal of first control circuit are connect with the output end of the first signal source, and when the first letter
When the output end in number source is high level, the output end of first control circuit is high level；When the output end of the first signal source is low
When level, the output end of first control circuit is without output；
The input terminal of second control circuit, second control circuit is connect with the output end in second signal source, and when the second letter
When the output end in number source is high level, the output end of second control circuit is low level；When the output end in second signal source is low
When level, the output end of second control circuit is without output；
The anode of first optocoupler U1, the photophore of the first optocoupler U1 are connect with the output end of first control circuit, the first light
The cathode of the photophore of coupling U1 is connect with the output end in second signal source；The external first gating electricity of the light-receiving device of first optocoupler U1
Road；And
The anode of second optocoupler U2, the photophore of the second optocoupler U2 are connect with the output end of first control circuit, the second light
The cathode of the photophore of coupling U2 and the output end of second control circuit connect；The external first gating electricity of the light-receiving device of second optocoupler U2
Road.
What kind of level false triggering no matter gating provided by the utility model protection circuit occur, the first optocoupler U1 and the
As soon as two optocoupler U2 can only be connected, in this case the first gating circuit and the second gating circuit can only also be connected one, protect
The safety of equipment in gating circuit is demonstrate,proved.
Specifically, when the output end of the first signal source is high level, the output end of first control circuit is high level, i.e.,
The anode of the photophore of the anode and the second optocoupler U2 of the photophore of first optocoupler U1 is high level；
At this point, the first optocoupler U1 will end if the output end in second signal source is high level, the first gating circuit is disconnected；
And when the output end high level in second signal source, the output end of second control circuit is low level, and the second optocoupler U2 is connected, the
The conducting of two gating circuits；
At this point, the first optocoupler U1 will be connected if the output end in second signal source is low level, the conducting of the first gating circuit；
And when the output end in second signal source is low level, without output, the second optocoupler U2 ends the output end of second control circuit, the
Two gating circuits disconnect.
When the output end of the first signal source is low level, the output end of first control circuit is without output；At this point, no matter
The output end in binary signal source is high level or low level, and the first optocoupler U1 and the second optocoupler U2 can end, the first gating electricity
Road and the second gating circuit disconnect.
A kind of gating of the utility model embodiment 2 protects circuit, and on the basis of embodiment 1, first control circuit includes
First NPN triode Q1, the base stage B of the first NPN triode Q1 are the input terminal of first control circuit, the first NPN triode Q1
Emitter E be first control circuit output end；The collector C of first NPN triode Q1 is connected with power supply VCC；
Second control circuit includes that the base stage B of the second NPN triode Q2, the second NPN triode Q2 is second control circuit
Input terminal, the collector C of the second NPN triode Q2 is the output end of second control circuit；The transmitting of second NPN triode Q2
Pole E ground connection.
When the output end of the first signal source is high level, the conducting of the first NPN triode Q1, the photophore of the first optocoupler U1
Anode and the anode of photophore of the second optocoupler U2 be high level；
At this point, the first optocoupler U1 will end if the output end in second signal source is high level, the first gating circuit is disconnected；
And when the output end in second signal source is high level, the second NPN triode Q2 conducting, the second optocoupler U2 conducting, the second gating
Circuit conducting；
At this point, the first optocoupler U1 will be connected if the output end in second signal source is low level, the conducting of the first gating circuit；
And when the output end in second signal source is low level, the second NPN triode Q2 will end, the second optocoupler U2 cut-off, the second choosing
Circuit passband disconnects.
When the output end of the first signal source is low level, the cut-off of the first NPN triode Q1；At this point, no matter second signal
The output end in source is high level or low level, and the first optocoupler U1 and the second optocoupler U2 can end, the first gating circuit and the
Two gating circuits disconnect.
A kind of gating of the utility model embodiment 3 protects circuit, on the basis of embodiment 2, the first signal source-series the
It is connect after one resistance R1 with the base stage B of the first NPN triode Q1.First resistor R1 is current-limiting resistance.
A kind of gating of the utility model embodiment 4 protects circuit, on the basis of embodiment 2 or 3, the first NPN triode
It is grounded after the base stage B series connection second resistance R2 of Q1.Second resistance R2 is to prevent the first NPN triode Q1 from misleading, when the first letter
When the output signal in number source is unstable, it is possible to create a sharp pulse level, since the time is shorter, this voltage can pass through
Two resistance R2 are dragged down.
A kind of gating of the utility model embodiment 5 protects circuit, in embodiment 2 to 4 on the basis of any embodiment, the
It is connect after the collector C series connection 3rd resistor R3 of one NPN triode Q1 with power supply VCC.3rd resistor R3 is current-limiting resistance.
A kind of gating of the utility model embodiment 6 protects circuit, in embodiment 2 to 5 on the basis of any embodiment, the
It is connect after the source-series 4th resistance R4 of binary signal with the base stage B of the second NPN triode Q2.4th resistance R4 is current-limiting resistance.
A kind of gating of the utility model embodiment 7 protects circuit, in embodiment 2 to 6 on the basis of any embodiment, the
It is grounded after the 5th resistance R5 of base stage B series connection of two NPN triode Q2.5th resistance R5 is to prevent the second NPN triode Q2 from misleading
It is logical, when the output signal in second signal source is unstable, it is possible to create a sharp pulse level, since the time is shorter, this electricity
Pressure can be dragged down by the 5th resistance R5.
A kind of gating of the utility model embodiment 8 protects circuit, and on the basis of embodiment 1, first control circuit includes
First N-channel MOS pipe, the grid of the first N-channel MOS pipe are the input terminal of first control circuit, the source of the first N-channel MOS pipe
The extremely output end of first control circuit；The drain electrode of first N-channel MOS pipe is connected with power supply；
Second control circuit includes the second N-channel MOS pipe, and the grid of the second N-channel MOS pipe is the defeated of second control circuit
Enter end, the drain electrode of the second N-channel MOS pipe is the output end of second control circuit；The source electrode of second N-channel MOS pipe is grounded.
The above is only the preferred embodiments of the utility model, are not intended to limit the utility model, all in the utility model
Spirit and principle within, any modification, equivalent replacement, improvement and so on should be included in the protection model of the utility model
Within enclosing.
Claims (8)
1. a kind of gating protects circuit, it is characterised in that: include:
First control circuit, the input terminal of the first control circuit are connect with the output end of the first signal source, and when described the
When the output end of one signal source is high level, the output end of the first control circuit is high level；When first signal source
Output end be low level when, the output end of the first control circuit is without output；
The input terminal of second control circuit, the second control circuit is connect with the output end in second signal source, and when described the
When the output end in binary signal source is high level, the output end of the second control circuit is low level；When the second signal source
Output end be low level when, the output end of the second control circuit is without output；
The anode of first optocoupler, the photophore of first optocoupler is connect with the output end of the first control circuit, and described the
The cathode of the photophore of one optocoupler is connect with the output end in the second signal source；The light-receiving device external first of first optocoupler
Gating circuit；And
The anode of second optocoupler, the photophore of second optocoupler is connect with the output end of the first control circuit, and described the
The cathode of the photophore of two optocouplers is connect with the output end of the second control circuit；The light-receiving device of second optocoupler external
Two gating circuits.
2. a kind of gating protects circuit according to claim 1, it is characterised in that:
The first control circuit includes the first NPN triode, and the base stage of first NPN triode is the first control electricity
The input terminal on road, the output end of the extremely described first control circuit of transmitting of first NPN triode；First NPN tri-
The collector of pole pipe is connected with power supply；
The second control circuit includes the second NPN triode, and the base stage of second NPN triode is the second control electricity
The input terminal on road, the output end of the extremely described second control circuit of the current collection of second NPN triode；2nd NPN tri-
The emitter of pole pipe is grounded.
3. a kind of gating protects circuit according to claim 2, it is characterised in that: the source-series first resistor of the first signal
It is connect afterwards with the base stage of first NPN triode.
4. a kind of gating protects circuit according to claim 2, it is characterised in that: the base stage string of first NPN triode
It is grounded after connection second resistance.
5. a kind of gating protects circuit according to claim 2, it is characterised in that: the collector of first NPN triode
It is connect after series connection 3rd resistor with the power supply.
6. a kind of gating protects circuit according to claim 2, it is characterised in that: source-series 4th resistance of second signal
It is connect afterwards with the base stage of second NPN triode.
7. a kind of gating protects circuit according to claim 2, it is characterised in that: the base stage string of second NPN triode
It is grounded after joining the 5th resistance.
8. a kind of gating protects circuit according to claim 1, it is characterised in that:
The first control circuit includes the first N-channel MOS pipe, and the grid of the first N-channel MOS pipe is first control
The input terminal of circuit, the source electrode of the first N-channel MOS pipe are the output end of the first control circuit；First N-channel
The drain electrode of metal-oxide-semiconductor is connected with power supply；
The second control circuit includes the second N-channel MOS pipe, and the grid of the second N-channel MOS pipe is second control
The input terminal of circuit, the drain electrode of the second N-channel MOS pipe are the output end of the second control circuit；Second N-channel
The source electrode of metal-oxide-semiconductor is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821919853.5U CN209299234U (en) | 2018-11-20 | 2018-11-20 | A kind of gating protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821919853.5U CN209299234U (en) | 2018-11-20 | 2018-11-20 | A kind of gating protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209299234U true CN209299234U (en) | 2019-08-23 |
Family
ID=67645585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821919853.5U Active CN209299234U (en) | 2018-11-20 | 2018-11-20 | A kind of gating protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209299234U (en) |
-
2018
- 2018-11-20 CN CN201821919853.5U patent/CN209299234U/en active Active
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