CN103346530A - Telemetering terminal protection circuit - Google Patents
Telemetering terminal protection circuit Download PDFInfo
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- CN103346530A CN103346530A CN2013102664430A CN201310266443A CN103346530A CN 103346530 A CN103346530 A CN 103346530A CN 2013102664430 A CN2013102664430 A CN 2013102664430A CN 201310266443 A CN201310266443 A CN 201310266443A CN 103346530 A CN103346530 A CN 103346530A
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Abstract
The invention discloses a telemetering terminal protection circuit. The telemetering terminal protection circuit comprises an interior circuit, an electrostatic protection circuit and an anti-surge circuit. The electrostatic protection circuit is connected with an IO port, the common connection end of a resistor R2 and a diode D on the electrostatic protection circuit is connected to an interior power source, and one end of the diode D is grounded. The anti-surge circuit is connected with an input signal port, the common connection end of an inductance coil L and a GDT on the anti-surge circuit is connected to the interior circuit, and one end of the GDT is grounded. Based on the principle, the electrostatic currents can be limited, the suitable currents can be made to flow to the interior power source selectively, and the interior circuit is prevented from being damaged by the excessively large currents.
Description
Technical field
The present invention relates to the protection circuit field, be specifically related to telemetry terminal system organizational security protection circuit.
Background technology
The telemetry terminal system that is exclusively used in water conservancy monitoring and geology monitoring is realized sensing data is gathered, and is uploaded to by various communication networking models and compiles central station, and central station carries out the early warning service with carry out the model calculation according to the data of compiling.Central station can carry out long-range trick survey, Remote configuration, remote maintenance to remote terminal.Telemetry terminal system is being brought into play important effect in observation process.In addition, the telemetry terminal system that is used for water conservancy monitoring and geology monitoring field is in high humility all the year round, high rainwater, and high temperature tans by the sun, and works under the high and cold environment that freezes.Usually be erected at the place that the people is difficult to arrive.Therefore require product can be under this environment steady operation.And telemetry terminal system gas can produce static when rubbing with particulates such as air, aqueous vapor, dusts, if do not take measures, the operate as normal of interfere with wireless communications equipment influences remote monitoring easily.And the unstable meeting of the supply current on remote terminal impact generation such as the situation that causes the electric current paralysis to remote terminal inside.
Summary of the invention
The present invention has overcome the deficiencies in the prior art, and telemetry terminal system organizational security protection circuit is provided, can the limit static electric current and can optionally allow suitable current flow to internal electric source, prevent that excessive electric current from damaging internal circuit.
For solving above-mentioned technical problem, the present invention is by the following technical solutions: telemetry terminal system organizational security protection circuit, comprise internal circuit, electrostatic discharge protection circuit and anti-surge circuit, described electrostatic discharge protection circuit is connected with the IO port, wherein the public connecting end of resistance R2 and diode D is connected on the internal electric source on the electrostatic discharge protection circuit, diode D one end ground connection; Described anti-surge circuit is connected with the input signal port, and wherein the public connecting end of the inductance coil L on the anti-surge circuit and gas discharge tube GDT is connected on the internal circuit, gas discharge tube GDT one end ground connection.
Described electrostatic discharge protection circuit comprises triode T1, triode T2, triode T3, diode D and resistance R 2, wherein triode T1 and triode T2 are connected in series, triode T3 is connected in parallel on the two ends of triode T1 and triode T2, the collector electrode of the emitter of triode T1 and triode T3 all connects power line, and the emitter of triode T2 and triode T3 all is connected negative pole and the while ground connection of diode D; Resistance R 2 one ends wherein connect the IO port, and the other end connects the negative pole of diode D, the collector electrode of triode T1 and the collector electrode of triode T2 simultaneously.
The basis set of described triode T1, triode T2 and triode T3 all is connected on separately the emitter.
Described triode T2 and triode T3 are NPN type triode, and triode T1 is the positive-negative-positive triode.
Described anti-surge circuit comprises resistance R 1, comparator A, field effect transistor P, inductance coil L and gas discharge tube GDT, resistance R 1 wherein, field effect transistor P, inductance coil L and gas discharge tube GDT are connected in series successively, two inputs of comparator A are connected the two ends of resistance R 1, the output of comparator A is connected the grid of field effect transistor P, and the input signal port is connected on the resistance R 1.
Compared with prior art, the invention has the beneficial effects as follows:
1, the present invention is provided with anti-surge circuit at the internal circuit front end, after the rated current of the electric current that flows through on the resistance in this circuit greater than internal circuit, the output signal of comparator A will be reversed, the field effect transistor P that is connected with comparator closes, stop super-high-current to flow into internal electric source, damage the internal electric source structure.
2, the present invention also is provided with electrostatic discharge protection circuit at the internal electric source front end, between power line and the ground wire, and power line and port, be triode between ground wire and the port static path is provided, the unnecessary static of in time draining avoids static that the operate as normal of Wireless Telecom Equipment is impacted.
Description of drawings
Fig. 1 is schematic diagram of the present invention.
Embodiment
The present invention is further elaborated below in conjunction with accompanying drawing, and embodiments of the invention are not limited thereto.
Embodiment:
As shown in Figure 1, the present invention includes internal circuit, electrostatic discharge protection circuit and anti-surge circuit, described electrostatic discharge protection circuit is connected with the IO port, and wherein the public connecting end of resistance R2 and diode D is connected on the internal electric source on the electrostatic discharge protection circuit, diode D one end ground connection.Be connected with the input signal port at anti-surge circuit, wherein the public connecting end of the inductance coil L on the anti-surge circuit and gas discharge tube GDT is connected on the internal circuit, gas discharge tube GDT one end ground connection.
The anti-surge circuit of present embodiment comprises resistance R 1, comparator A, field effect transistor P, inductance coil L and gas discharge tube GDT, resistance R 1 wherein, field effect transistor P, inductance coil L and gas discharge tube GDT are connected in series successively, two inputs of comparator A are connected the two ends of resistance R 1, the output of comparator A is connected the grid of field effect transistor P, and the input signal port is connected on the resistance R 1.
The electrostatic discharge protection circuit of present embodiment comprises triode T1, triode T2, triode T3, diode D and resistance R 2, wherein triode T1 and triode T2 are connected in series, triode T3 is connected in parallel on the two ends of triode T1 and triode T2, the collector electrode of the emitter of triode T1 and triode T3 all connects power line, and the emitter of triode T2 and triode T3 all is connected negative pole and the while ground connection of diode D; Resistance R 2 one ends wherein connect the IO port, and the other end connects the negative pole of diode D, the collector electrode of triode T1 and the collector electrode of triode T2 simultaneously.In addition, the basis set of triode T1, triode T2 and triode T3 all is connected on separately the emitter, and wherein triode T2 and triode T3 are NPN type triode, and triode T1 is the positive-negative-positive triode.
In the wave resistance circuit of internal circuit front end, when the electric current that flows through resistance R 1 during greater than the builtin voltage rated value set, comparator output signal upset, the internal current input is closed.Simultaneously, the antistatic circuit that connects on the internal circuit can allow between power line and the ground wire, and power line and port, is triode between ground wire and the port static path is provided, and the static of in time draining prevents the damage to Wireless Telecom Equipment.Gas discharge tube GDT is second class protection, and voltage becomes short-circuit condition during greater than certain value, and inductance impact electric current produces the reverse induction electric current, offsets the part percussion.Resistance R 2 is the restriction electrostatic induced current.Diode D is then as the two stages of circuit of electrostatic induced current.Two paths work to protect internal circuit simultaneously.
Just can realize this invention as mentioned above.
Claims (5)
1. telemetry terminal system organizational security protection circuit, it is characterized in that: comprise internal circuit, electrostatic discharge protection circuit and anti-surge circuit, described electrostatic discharge protection circuit is connected with the IO port, wherein the public connecting end of resistance R2 and diode D is connected on the internal electric source on the electrostatic discharge protection circuit, diode D one end ground connection; Described anti-surge circuit is connected with the input signal port, and wherein the public connecting end of the inductance coil L on the anti-surge circuit and gas discharge tube GDT is connected on the internal circuit, gas discharge tube GDT one end ground connection.
2. telemetry terminal system organizational security protection circuit according to claim 1, it is characterized in that: described electrostatic discharge protection circuit comprises triode T1, triode T2, triode T3, diode D and resistance R 2, wherein triode T1 and triode T2 are connected in series, triode T3 is connected in parallel on the two ends of triode T1 and triode T2, the collector electrode of the emitter of triode T1 and triode T3 all connects power line, and the emitter of triode T2 and triode T3 all is connected negative pole and the while ground connection of diode D; Resistance R 2 one ends wherein connect the IO port, and the other end connects the negative pole of diode D, the collector electrode of triode T1 and the collector electrode of triode T2 simultaneously.
3. telemetry terminal system organizational security protection circuit according to claim 2 is characterized in that: the basis set of described triode T1, triode T2 and triode T3 all is connected on separately the emitter.
4. telemetry terminal system organizational security protection circuit according to claim 2, it is characterized in that: described triode T2 and triode T3 are NPN type triode, and triode T1 is the positive-negative-positive triode.
5. according to any described telemetry terminal system organizational security protection circuit of claim 1-4; it is characterized in that: described anti-surge circuit comprises resistance R 1, comparator A, field effect transistor P, inductance coil L and gas discharge tube GDT; resistance R 1 wherein, field effect transistor P, inductance coil L and gas discharge tube GDT are connected in series successively; two inputs of comparator A are connected the two ends of resistance R 1; the output of comparator A is connected the grid of field effect transistor P, and the input signal port is connected on the resistance R 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102664430A CN103346530A (en) | 2013-06-28 | 2013-06-28 | Telemetering terminal protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102664430A CN103346530A (en) | 2013-06-28 | 2013-06-28 | Telemetering terminal protection circuit |
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| CN103346530A true CN103346530A (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013102664430A Pending CN103346530A (en) | 2013-06-28 | 2013-06-28 | Telemetering terminal protection circuit |
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| CN (1) | CN103346530A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870904A (en) * | 2016-06-14 | 2016-08-17 | 四川福豆科技有限公司 | Cache server based on school co-education platform |
| CN106300243A (en) * | 2016-08-22 | 2017-01-04 | 成都众山科技有限公司 | A kind of high stability telemetry terminal system |
| CN110707657A (en) * | 2019-10-28 | 2020-01-17 | 深圳市施罗德工业集团有限公司 | Overcurrent protection setting method, overcurrent protection method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5159518A (en) * | 1990-01-17 | 1992-10-27 | Vlsi Technology, Inc. | Input protection circuit for CMOS devices |
| US20030039084A1 (en) * | 2001-08-23 | 2003-02-27 | Institute Of Microelectronics | ESD protection system for high frequency applications |
| US20060164776A1 (en) * | 2005-01-18 | 2006-07-27 | Puls Gmbh | Current-limiting circuit and method for operating the circuit |
| CN201022237Y (en) * | 2007-02-08 | 2008-02-13 | 唯冠科技（深圳）有限公司 | Over voltage protection circuit and power supply device |
| CN203312786U (en) * | 2013-06-28 | 2013-11-27 | 成都汉康信息产业有限公司 | Telemetry terminal machine protection circuit |
-
2013
- 2013-06-28 CN CN2013102664430A patent/CN103346530A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5159518A (en) * | 1990-01-17 | 1992-10-27 | Vlsi Technology, Inc. | Input protection circuit for CMOS devices |
| US20030039084A1 (en) * | 2001-08-23 | 2003-02-27 | Institute Of Microelectronics | ESD protection system for high frequency applications |
| US20060164776A1 (en) * | 2005-01-18 | 2006-07-27 | Puls Gmbh | Current-limiting circuit and method for operating the circuit |
| CN201022237Y (en) * | 2007-02-08 | 2008-02-13 | 唯冠科技（深圳）有限公司 | Over voltage protection circuit and power supply device |
| CN203312786U (en) * | 2013-06-28 | 2013-11-27 | 成都汉康信息产业有限公司 | Telemetry terminal machine protection circuit |
Non-Patent Citations (1)
| Title |
|---|
| 宋晓春: "CMOS集成电路ESD保护研究", 《中国优秀硕士学位论文全文数据库》, no. 3, 15 March 2012 (2012-03-15), pages 37 - 40 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870904A (en) * | 2016-06-14 | 2016-08-17 | 四川福豆科技有限公司 | Cache server based on school co-education platform |
| CN106300243A (en) * | 2016-08-22 | 2017-01-04 | 成都众山科技有限公司 | A kind of high stability telemetry terminal system |
| CN110707657A (en) * | 2019-10-28 | 2020-01-17 | 深圳市施罗德工业集团有限公司 | Overcurrent protection setting method, overcurrent protection method and device |
| CN110707657B (en) * | 2019-10-28 | 2022-01-28 | 深圳市施罗德工业集团有限公司 | Overcurrent protection setting method, overcurrent protection method and device |
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Application publication date: 20131009 |