CN203312783U - Electrostatic protection port of telemetry terminal machine - Google Patents
Electrostatic protection port of telemetry terminal machine Download PDFInfo
- Publication number
- CN203312783U CN203312783U CN2013203795815U CN201320379581U CN203312783U CN 203312783 U CN203312783 U CN 203312783U CN 2013203795815 U CN2013203795815 U CN 2013203795815U CN 201320379581 U CN201320379581 U CN 201320379581U CN 203312783 U CN203312783 U CN 203312783U
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- Prior art keywords
- triode
- port
- collector electrode
- electrostatic protection
- diode
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Abstract
The utility model discloses an electrostatic protection port of a telemetry terminal machine. The electrostatic protection port comprises the port. The port is connected with an electrostatic protection circuit. The electrostatic protection circuit comprises a resistor, a triode T1, a triode T2, a triode T3 and a diode. A collector electrode of the triode T1 is connected to a collector electrode of the triode T2, a base electrode and an emitting electrode are connected and are simultaneously connected to a VDD. A base electrode of the triode T2 is connected to the emitting electrode and is simultaneously grounded. A collector electrode of the triode T3 is connected to the VDD, and a base electrode and an emitting electrode are simultaneously connected to the emitting electrode of the triode T2. A cathode of the diode is simultaneously connected with a collector electrode of the triode T2 and the resistor and an anode is grounded. The port of the utility model has the advantages that the port is connected with the electrostatic protection circuit so that damages of static electricity to an internal electronic component can be effectively avoided; a circuit structure is simple.
Description
Technical field
The utility model relates to a kind of telemetering terminal, relates in particular a kind of telemetering terminal electrostatic defending port.
Background technology
Telemetering terminal is that microprocessor is controlled, 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.Telemetering terminal also is telemetering terminal equipment usually, is applied in every field.Its inner electronic devices and components of telemetering terminal are more, and are responsive electronic devices and components mostly, for example the device of transducer and so on.Telemetering terminal generally is arranged on outdoor, and its environment is severe, can be subject to the interference of static, and static is very big to the injury of inner responsive electronic devices and components.
The utility model content
The utility model provides a kind of telemetering terminal electrostatic defending port, and it is connected with electrostatic discharge protection circuit on port, can effectively avoid the destruction of static to internal electronic component, and circuit structure is simple.
For solving above-mentioned technical problem, the utility model by the following technical solutions:
Telemetering terminal electrostatic defending port, it comprises port, is connected with electrostatic discharge protection circuit on 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 is connected with emitter and is connected to simultaneously on VDD; The base stage of described triode T2 is connected on emitter and while ground connection; It is upper that the collector electrode of described triode T3 is connected to VDD, and base stage and emitter are connected on the emitter of triode T2 simultaneously, and the negative pole of described diode is connected with resistance with the collector electrode of triode T2 simultaneously, plus earth.
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 beneficial effects of the utility model are: circuit of the present utility model comprises a resistance, 3 triodes and a diode; its circuit structure is simple; can effectively protect the internal circuit of telemetering terminal, avoid the destruction of static to the telemetering terminal internal electronic component.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.Execution mode of the present utility model includes but not limited to the following example.
[embodiment]
Telemetering terminal electrostatic defending port as shown in Figure 1, it comprises port, is connected with electrostatic discharge protection circuit on 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 is connected with emitter and is connected to simultaneously on VDD; The base stage of described triode T2 is connected on emitter and while ground connection; It is upper that the collector electrode of described triode T3 is connected to VDD, and base stage and emitter are connected on the emitter of triode T2 simultaneously, and the negative pole of described diode is connected with resistance with the collector electrode of triode T2 simultaneously, plus earth.
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 the serious offense telemetering terminal 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 the present embodiment is as follows:
One end of the resistance of electrostatic discharge protection circuit of the present utility model is connected on the collector electrode of triode T1, and the other end namely is connected on port, and the negative pole of diode is connected on the internal circuit of telemetering terminal.During in port, electrostatic discharge protection circuit can be releasing of static many paths is provided when electrostatic interaction.Namely from VDD to the port, port is 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 by electrostatic leakage, diode provided secondary to release, to guarantee, that electrostatic leakage is complete.
According to the above embodiments, can well complete the utility model.
Be as mentioned above embodiment of the present utility model.The utility model is not limited to above-mentioned execution mode, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, within all falling into protection range of the present utility model.
Claims (4)
1. telemetering terminal electrostatic defending port, it comprises port, it is characterized in that: on described port, be connected with electrostatic discharge protection circuit, 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 is connected with emitter and is connected to simultaneously on VDD; The base stage of described triode T2 is connected on emitter and while ground connection; It is upper that the collector electrode of described triode T3 is connected to VDD, and base stage and emitter are connected on the emitter of triode T2 simultaneously, and the negative pole of described diode is connected with resistance with the collector electrode of triode T2 simultaneously, plus earth.
2. telemetering terminal electrostatic defending port 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. telemetering terminal electrostatic defending port according to claim 2, it is characterized in that: described diode is voltage stabilizing didoe.
4. telemetering terminal electrostatic defending port 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 |
|---|---|---|---|
| CN2013203795815U CN203312783U (en) | 2013-06-28 | 2013-06-28 | Electrostatic protection port of telemetry terminal machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203795815U CN203312783U (en) | 2013-06-28 | 2013-06-28 | Electrostatic protection port of telemetry terminal machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203312783U true CN203312783U (en) | 2013-11-27 |
Family
ID=49618958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203795815U Expired - Fee Related CN203312783U (en) | 2013-06-28 | 2013-06-28 | Electrostatic protection port of telemetry terminal machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203312783U (en) |
-
2013
- 2013-06-28 CN CN2013203795815U patent/CN203312783U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Jing Inventor after: Chen Yuliang Inventor after: Geng Hongzhen Inventor before: Zhu Zhengxiu Inventor before: An Rui Inventor before: Yang Chunlong Inventor before: Han Xiujun Inventor before: Yang Mengpan |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHU ZHENGXIU AN RUI YANG CHUNLONG HAN XIUJUN YANG MENGSHAN TO: CHEN JING CHEN YULIANG GENG HONGZHEN |
|
| 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: 20131127 Termination date: 20170628 |