CN103346545A - Telemetering terminal electrostatic protection circuit - Google Patents
Telemetering terminal electrostatic protection circuit Download PDFInfo
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- CN103346545A CN103346545A CN 201310266082 CN201310266082A CN103346545A CN 103346545 A CN103346545 A CN 103346545A CN 201310266082 CN201310266082 CN 201310266082 CN 201310266082 A CN201310266082 A CN 201310266082A CN 103346545 A CN103346545 A CN 103346545A
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- triode
- protection circuit
- audion
- electrostatic discharge
- discharge protection
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Abstract
The invention discloses a telemetering terminal electrostatic protection circuit which comprises a port. The port is connected with the electrostatic protection circuit which comprises a resistor, an audion T1, an audion T2, an audion T3 and a diode. A collector of the audion T1 is connected with a collector of the audion T2, and a base electrode and an emission electrode of the audion T1 are connected and are connected to a VDD at the same time. A base electrode of the audion T2 is connected to an emission electrode and is connected to the ground at the same time. A collector of the audion T3 is connected with the VDD, a base electrode and an emission electrode are connected to the emission electrode of the audion T2 at the same time, a negative electrode of the diode is connected with the collector of the audion T2 and the resistor at the same time, and a positive electrode is connected with the ground. The telemetering terminal electrostatic protection circuit has the advantages that the electrostatic protection circuit is connected to the port, damage on inner electronic elements from static electricity can be effectively avoided, and the structure of the circuit is simple.
Description
Technical field
The present invention relates to a kind of telemetry terminal system machine, relate to a kind of electrostatic discharge protection circuit of telemetry terminal system machine in particular.
Background technology
The telemetry terminal system machine is microprocessor control, this electronic equipment interfaces is by issuing a dcs or SCADA(supervisory control and data aquisition system in physics circle) telemetry equipment, connecting object that system is based on control message changes system.The telemetry terminal system machine also is telemetering terminal equipment usually, is applied in every field.Its inner electronic devices and components of telemetry terminal system machine are more, and are responsive electronic devices and components, for example device of transducer and so on mostly.The telemetry terminal system machine generally is installed in outdoor, and its environment is abominable, can be subjected to the interference of static, and static is very big to the injury of the responsive electronic devices and components of inside.
Summary of the invention
The invention provides a kind of electrostatic discharge protection circuit of telemetry terminal system machine, it is connected with electrostatic discharge protection circuit at port, can effectively avoid static to the destruction of internal electronic component, and circuit structure is simple.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
The electrostatic discharge protection circuit of telemetry terminal system machine, it comprises port, is connected with electrostatic discharge protection circuit on the described port, described electrostatic discharge protection circuit comprises resistance, triode T1, triode T2, triode T3 and diode; The collector electrode of described triode T1 is connected on the collector electrode of triode T2, and base stage links to each other with emitter and is connected on the VDD simultaneously; The base stage of described triode T2 is connected on the emitter and while ground connection; The collector electrode of described triode T3 is connected on the VDD, and base stage and emitter are connected on the emitter of triode T2 simultaneously, and the negative pole of described diode links to each other plus earth with the collector electrode of triode T2 simultaneously with resistance.
Further technical scheme is:
As preferably, described triode T1 is the positive-negative-positive triode, and triode T2 and triode T3 are NPN type triode.
Further, described diode is voltage stabilizing didoe.
As preferably, the resistance of described resistance is 10000 ohm.
Compared with prior art; the invention has the beneficial effects as follows: circuit of the present invention comprises a resistance, 3 triodes and a diode; its circuit structure is simple, can effectively protect the internal circuit of telemetry terminal system machine, avoids static to the destruction of telemetry terminal system machine internal electronic component.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.Embodiments of the present invention include but not limited to the following example.
[embodiment]
The electrostatic discharge protection circuit of telemetry terminal system machine as shown in Figure 1, it comprises port, is connected with electrostatic discharge protection circuit on the described port, described electrostatic discharge protection circuit comprises resistance, triode T1, triode T2, triode T3 and diode; The collector electrode of described triode T1 is connected on the collector electrode of triode T2, and base stage links to each other with emitter and is connected on the VDD simultaneously; The base stage of described triode T2 is connected on the emitter and while ground connection; The collector electrode of described triode T3 is connected on the VDD, and base stage and emitter are connected on the emitter of triode T2 simultaneously, and the negative pole of described diode links to each other plus earth with the collector electrode of triode T2 simultaneously with resistance.
Described triode T1 is the positive-negative-positive triode, and triode T2 and triode T3 are NPN type triode.
Described diode is voltage stabilizing didoe.
The internal circuit of crossing serious offense telemetry terminal system machine for fear of electrostatic induced current damages, and the resistance of described resistance is 10000 ohm, and resistance plays current limliting.
The course of work of present embodiment is as follows:
One end of the resistance of electrostatic discharge protection circuit of the present invention is connected on the collector electrode of triode T1, and the other end namely is connected on the port, and the negative pole of diode is connected on the internal circuit of telemetry terminal system machine.When electrostatic interaction during in port, electrostatic discharge protection circuit can be static electricity release many paths is provided.Namely from VDD to the port, port to VDD, port to ground wire, ground wire to port.VDD is power line.Diode is as two stages of circuit, and when triode T1, triode T2, triode T3 were incomplete with electrostatic leakage, diode provided secondary to release, and is to guarantee that electrostatic leakage is complete.
According to the above embodiments, can well finish the present invention.
Be embodiments of the invention as mentioned above.The present invention is not limited to above-mentioned execution mode, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (4)
1. the electrostatic discharge protection circuit of telemetry terminal system machine, it comprises port, it is characterized in that: be connected with electrostatic discharge protection circuit on the described port, described electrostatic discharge protection circuit comprises resistance, triode T1, triode T2, triode T3 and diode; The collector electrode of described triode T1 is connected on the collector electrode of triode T2, and base stage links to each other with emitter and is connected on the VDD simultaneously; The base stage of described triode T2 is connected on the emitter and while ground connection; The collector electrode of described triode T3 is connected on the VDD, and base stage and emitter are connected on the emitter of triode T2 simultaneously, and the negative pole of described diode links to each other plus earth with the collector electrode of triode T2 simultaneously with resistance.
2. the electrostatic discharge protection circuit of telemetry terminal system machine according to claim 1, it is characterized in that: described triode T1 is the positive-negative-positive triode, triode T2 and triode T3 are NPN type triode.
3. the electrostatic discharge protection circuit of telemetry terminal system machine according to claim 2, it is characterized in that: described diode is voltage stabilizing didoe.
4. the electrostatic discharge protection circuit of telemetry terminal system machine according to claim 1, it is characterized in that: the resistance of described resistance is 10000 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310266082 CN103346545A (en) | 2013-06-28 | 2013-06-28 | Telemetering terminal electrostatic protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310266082 CN103346545A (en) | 2013-06-28 | 2013-06-28 | Telemetering terminal electrostatic protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103346545A true CN103346545A (en) | 2013-10-09 |
Family
ID=49281328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310266082 Pending CN103346545A (en) | 2013-06-28 | 2013-06-28 | Telemetering terminal electrostatic protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103346545A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683254A (en) * | 2013-11-28 | 2014-03-26 | 成都市宏山科技有限公司 | Lightning protection circuit with high reliability |
| CN103686016A (en) * | 2013-11-28 | 2014-03-26 | 成都市宏山科技有限公司 | Television with three-level lightning protection function |
| CN106153078A (en) * | 2016-08-22 | 2016-11-23 | 成都众山科技有限公司 | A kind of telemetry terminal system with electrostatic defending |
-
2013
- 2013-06-28 CN CN 201310266082 patent/CN103346545A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683254A (en) * | 2013-11-28 | 2014-03-26 | 成都市宏山科技有限公司 | Lightning protection circuit with high reliability |
| CN103686016A (en) * | 2013-11-28 | 2014-03-26 | 成都市宏山科技有限公司 | Television with three-level lightning protection function |
| CN106153078A (en) * | 2016-08-22 | 2016-11-23 | 成都众山科技有限公司 | A kind of telemetry terminal system with electrostatic defending |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131009 |