CN208656410U - A kind of data line protection circuit - Google Patents
A kind of data line protection circuit Download PDFInfo
- Publication number
- CN208656410U CN208656410U CN201821317206.7U CN201821317206U CN208656410U CN 208656410 U CN208656410 U CN 208656410U CN 201821317206 U CN201821317206 U CN 201821317206U CN 208656410 U CN208656410 U CN 208656410U
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- Prior art keywords
- circuit
- input terminal
- connector
- data line
- control chip
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- 230000005669 field effect Effects 0.000 claims description 19
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims 1
- 208000025274 Lightning injury Diseases 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 101710190981 50S ribosomal protein L6 Proteins 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a kind of data lines to protect circuit; including control chip U1, switching circuit, the first esd protection circuit and the second esd protection circuit; control the control signal of the control output end connection switch circuit of chip U1; the input terminal of first esd protection circuit is connected in parallel on the input terminal of control chip U1 and switching circuit, and the input terminal of the second esd protection circuit is connected in parallel on the output end of switching circuit；First esd protection circuit includes that the other end of the first electrostatic releaser D1, the first electrostatic releaser D1 is grounded, and the second esd protection circuit includes that the other end of the second electrostatic releaser D2, the second electrostatic releaser D2 is grounded.The utility model improves the safety of circuit by the electrostatic generated in the first electrostatic releaser D1 and the second timely release circuit of electrostatic releaser D2.
Description
Technical field
The utility model relates to data line technical fields, protect circuit more particularly to a kind of data line.
Background technique
Data line is widely used in daily life, but the electrostatic problem of data line also annoyings everybody, existing
Some data line antistatic grades are all lower, can not effectively prevent destruction of the high-intensitive electrostatic to data line, and safety is lower.
Utility model content
The purpose of this utility model is to provide a kind of structures simply, the pyroelectric sensor of strong antijamming capability.
A kind of pyroelectric sensor disclosed by the utility model the technical solution adopted is that:
A kind of data line protection circuit, including control chip U1, switching circuit, the first esd protection circuit and the 2nd ESD are protected
Protection circuit, the control output end of the control chip U1 connect the control signal of the switching circuit, the first ESD protection
The input terminal of circuit is connected in parallel on the input terminal of control the chip U1 and the switching circuit, second esd protection circuit
Input terminal is connected in parallel on the output end of the switching circuit.
First esd protection circuit includes the first electrostatic releaser D1, the other end of the first electrostatic releaser D1
Ground connection, second esd protection circuit include the second electrostatic releaser D2, another termination of the second electrostatic releaser D2
Ground.
It preferably, further include the first connector J1, the output end of the first connector J1 and the control chip U1
Input terminal between pass through power supply line connect.
Preferably, it is in series between the input terminal of the control chip U1 and the output end of the first connector J1
One end of resistance R2, the resistance R2 connect the control chip U1, and the other end of the resistance R2 connects first connector
One end of J1 and the first electrostatic releaser D1.
It preferably, further include the input terminal connection switching circuit of the second connector J2, the second connector J2
Output end, by data line communication connection between the second connector J2 and the control chip U1, the second connector J2
Pass through data line communication connection between the first connector J1.
Preferably, the switching circuit includes field-effect tube Q1, described in the grid connection of the field-effect tube Q1
The control pin 6 of chip U1 is controlled, the source electrode of the field-effect tube Q1 connects the output end of the first connector J1, the field effect
Should the drain electrode of pipe Q1 connect the input terminal of the second connector J2.
Preferably, resistance R1 is also parallel between the source electrode and drain electrode of the field-effect tube Q1.
Preferably, the power end of the control chip U1 is in series with capacitor C1, another termination of the capacitor C1
Ground.
The utility model provides a kind of data line protection circuit, controls the input terminal of chip U1 and the input terminal of switching circuit
It is parallel with the first electrostatic releaser D1, the output end of switching circuit is parallel with the second electrostatic releaser D2.It is quiet when being generated in circuit
When electric, the first electrostatic releaser D1 can timely will control chip U1 input terminal and the switching circuit input terminal before
Electrostatic is discharged by ground connection, so that control chip and switching circuit be protected not to be influenced by electrostatic.Second electrostatic releaser D2
Timely the electrostatic after the output end of switching circuit can be discharged by ground connection, so that protective switch circuit is not by electrostatic
It influences.The utility model passes through quiet in the first electrostatic releaser D1 and the second electrostatic releaser D2 effective solution data line
Electric problem can effectively eliminate the influence generated such as lightning stroke lamp high intensity electrostatic to circuit, improve the safety of data line.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the data line protection circuit of the utility model.
Specific embodiment
The utility model is further elaborated and is illustrated with Figure of description combined with specific embodiments below:
Referring to FIG. 1, a kind of data line protects circuit, including control chip U110, switching circuit 20, the first ESD protection
The control output end of circuit 30 and the second esd protection circuit 40, the control chip U110 connects the control of the switching circuit 20
Input terminal processed, the input terminal of first esd protection circuit 30 are connected in parallel on the control chip U110 and the switching circuit 20
Input terminal, the input terminal of second esd protection circuit 40 is connected in parallel on the output end of the switching circuit 20.Control chip
The model BL10 of U110.
First esd protection circuit 30 includes the first electrostatic releaser D1, and the first electrostatic releaser D1's is another
End ground connection, second esd protection circuit 40 include the second electrostatic releaser D2, the other end of the second electrostatic releaser D2
Ground connection.
It further include the first connector J150, the input terminal of the output end of the first connector J150 and the control chip U110
Between pass through power supply line connect.
Resistance R2, institute are in series between the input terminal of the control chip U110 and the output end of the first connector J150
The one end for stating resistance R2 connects the control chip U110, and the other end of the resistance R2 connects the first connector J150 and institute
State one end of the first electrostatic releaser D1.Resistance R2 is current-limiting resistance.
It further include that the input terminal of the second connector J260, the second connector J260 connects the output of the switching circuit 20
End passes through data line communication connection, the second connector J260 between the second connector J260 and the control chip U110
Pass through data line communication connection between the first connector J150.
The switching circuit 20 includes field-effect tube Q1, and the field-effect tube Q1 is P-channel field-effect transistor (PEFT) pipe.The field-effect
The grid of pipe Q1 connects the control pin 6 of the control chip U1, and the source electrode of the field-effect tube Q1 connects first connector
The output end of J1, the drain electrode of the field-effect tube Q1 connect the input terminal of the second connector J2.The control of control chip U1 is drawn
Foot 6 exports low level to the grid of field-effect tube Q1, and the source electrode and drain electrode of field-effect tube Q1 can be connected.
Resistance R1 is also parallel between the source electrode and drain electrode of the field-effect tube Q1.Resistance R1 is biasing resistor.
The power end of the control chip U110 is in series with capacitor C1, the other end ground connection of the capacitor C1.Capacitor C1 rises
To the effect of filtering.
The utility model provides a kind of data line protection circuit, controls the input terminal of chip U1 and the input terminal of switching circuit
It is parallel with the first electrostatic releaser D1, the output end of switching circuit is parallel with the second electrostatic releaser D2.It is quiet when being generated in circuit
When electric, the first electrostatic releaser D1 can timely will control chip U1 input terminal and the switching circuit input terminal before
Electrostatic is discharged by ground connection, so that control chip and switching circuit be protected not to be influenced by electrostatic.Second electrostatic releaser D2
Timely the electrostatic after the output end of switching circuit can be discharged by ground connection, so that protective switch circuit is not by electrostatic
It influences.The utility model passes through quiet in the first electrostatic releaser D1 and the second electrostatic releaser D2 effective solution data line
Electric problem can effectively eliminate the influence generated such as lightning stroke lamp high intensity electrostatic to circuit, improve the safety of data line.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than to this reality
With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this
The spirit and scope of utility model technical solution.
Claims (7)
1. a kind of data line protects circuit, it is characterised in that: including control chip U1, switching circuit, the first esd protection circuit and
Second esd protection circuit, the control output end of the control chip U1 connect the control signal of the switching circuit, and described the
The input terminal of one esd protection circuit is connected in parallel on the input terminal of control the chip U1 and the switching circuit, and the 2nd ESD is protected
The input terminal of protection circuit is connected in parallel on the output end of the switching circuit；
First esd protection circuit includes that the other end of the first electrostatic releaser D1, the first electrostatic releaser D1 is grounded,
Second esd protection circuit includes that the other end of the second electrostatic releaser D2, the second electrostatic releaser D2 is grounded.
2. data line as described in claim 1 protects circuit, it is characterised in that: further include the first connector J1, described first connects
It is connected between the output end of head J1 and the input terminal of the control chip U1 by power supply line.
3. data line as claimed in claim 2 protects circuit, it is characterised in that: the input terminal of the control chip U1 and described
Resistance R2 is in series between the output end of first connector J1, one end of the resistance R2 connects the control chip U1, the electricity
The other end of resistance R2 connects one end of the first connector J1 and the first electrostatic releaser D1.
4. data line as claimed in claim 2 protects circuit, it is characterised in that: further include the second connector J2, described second connects
The input terminal of head J2 connects the output end of the switching circuit, passes through number between the second connector J2 and the control chip U1
According to line communication connection, pass through data line communication connection between the second connector J2 and the first connector J1.
5. data line as claimed in claim 4 protects circuit, it is characterised in that: the switching circuit includes field-effect tube Q1,
The grid of the field-effect tube Q1 connects the control pin 6 of the control chip U1, and the source electrode of the field-effect tube Q1 connects institute
The output end of the first connector J1 is stated, the drain electrode of the field-effect tube Q1 connects the input terminal of the second connector J2.
6. data line as claimed in claim 5 protects circuit, it is characterised in that: the source electrode and drain electrode of the field-effect tube Q1 it
Between be also parallel with resistance R1.
7. data line as described in claim 1 protects circuit, it is characterised in that: the power end of the control chip U1 is in series with
The other end of capacitor C1, the capacitor C1 are grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821317206.7U CN208656410U (en) | 2018-08-14 | 2018-08-14 | A kind of data line protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821317206.7U CN208656410U (en) | 2018-08-14 | 2018-08-14 | A kind of data line protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208656410U true CN208656410U (en) | 2019-03-26 |
Family
ID=65789897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821317206.7U Expired - Fee Related CN208656410U (en) | 2018-08-14 | 2018-08-14 | A kind of data line protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208656410U (en) |
-
2018
- 2018-08-14 CN CN201821317206.7U patent/CN208656410U/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 |
Granted publication date: 20190326 |