CN103840815A - Electrical independent contact output interface circuit with strong interference resistance - Google Patents
Electrical independent contact output interface circuit with strong interference resistance Download PDFInfo
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- CN103840815A CN103840815A CN201410102207.XA CN201410102207A CN103840815A CN 103840815 A CN103840815 A CN 103840815A CN 201410102207 A CN201410102207 A CN 201410102207A CN 103840815 A CN103840815 A CN 103840815A
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Abstract
The invention discloses an electrical independent contact output interface circuit with strong interference resistance. The electrical independent contact output interface circuit comprises a chip PS9714. A fifth pin of the chip PS9714 is connected to a power supply. A resistor R5 is connected between the fifth pin and a fourth pin. The fifth pin is connected with a grounding capacitor C1. Both a third pin and a second pin of the chip PS 9714 are grounded. A first pin of the chip PS 9714 is connected with a resistor R6. The resistor R6 is connected with a capacitor C2 in parallel. The fourth pin f the chip PS 9714 is connected to the base of a triode T1 through a resistor R2. The emitter of the triode T1 is grounded. The collector of the triode T1 is connected with a resistor R1. The other end of the resistor R1 is connected to the anode of a diode D1. The cathode of the diode D1 is connected to the cathode of a diode D2. The anode of the diode D1 is grounded. The electrical independent contact output interface circuit has the advantages that interference which is caused by an interference source to a time synchronization calibrator is effectively avoided, and precision and accuracy of the device are effectively improved.
Description
Technical field
The present invention relates to a kind of output interface circuit, relate in particular a kind of interference resistance strong without source contact output interface circuit.
Background technology
Time synchronized tester receives BD or gps signal, adopts statistic algorithm to tame local frequency marking, so that time synchronized tester is exported precise and stable standard signal, and measures external input signal according to this frequency marking, to evaluate its performance.Time check instrument, for the precision of checking time, is used for some and counts field accurately, as rocket launching, satellite navigation, astronomical clock etc. need the field that time precision is high.It directly transmits existing interface circuit data, and it is not suitable for and the field high to required precision, and especially, for time synchronized tester, interference source can reduce precision greatly to the interference of time synchronized tester.
Summary of the invention
The invention provides a kind of interference resistance strong without source contact output interface circuit, it utilizes optical coupler to isolate signal, effectively avoids interference the interference of source to time synchronized tester, effectively improves precision and the accuracy of equipment.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
Interference resistance strong without source contact output interface circuit, it comprises chip PS9714, the 5th pin of described chip PS9714 be connected on power supply and the 5th pin and the 4th pin between be connected with resistance R 5, on the 5th described pin, be connected with ground capacity C1, the 3rd pin of described chip PS9714 and the equal ground connection of the 2nd pin, on the 1st pin of described chip PS9714, be connected with resistance R 6, in described resistance R 6, be parallel with capacitor C 2, the 4th pin of described chip PS9714 is connected to by resistance R 2 in the base stage of triode T1, the grounded emitter of described triode T1, on the collector electrode of triode T1, be connected with resistance R 1, the other end of described resistance R 1 is connected on the anode of diode D1, the negative electrode of described diode D1 is connected on the negative electrode of diode D2, the plus earth of described diode D1, the anode of described diode D1 and the anode of diode D2 are all connected on interface unit.Chip PS9714 is optical coupler, and its 1st pin, the 2nd pin, the 3rd pin, the 4th pin and the 5th pin are respectively Anode pin, Cathode pin, GND pin, Vo pin and Vcc pin.
Further technical scheme is:
As preferably, the 4th pin of described chip PS9714 is connected to by resistance R 3 in the base stage of triode T2, the emitter base of described triode T2, the collector electrode of described triode T2 is connected on the negative electrode of diode D3, the anode of described diode D3 is connected with power supply by resistance R 4, and described diode D3 is light-emitting diode.
Further, described interface unit is 2 faller gill mothers.
Further, the resistance of described resistance R 3 and resistance R 2 equates.
Compared with prior art, the invention has the beneficial effects as follows: output interface circuit of the present invention utilizes optical coupler to isolate the interference source on output interface, cut off the path disturbing time synchronized tester, reach the object that isolation is disturbed, improve precision and the accuracy of time synchronized tester.
Brief description of the 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
Below in conjunction with accompanying drawing, the present invention is further illustrated.Embodiments of the present invention include but not limited to the following example.
[embodiment]
Interference resistance as shown in Figure 1 strong without source contact output interface circuit, it comprises chip PS9714, the 5th pin of described chip PS9714 be connected on power supply and the 5th pin and the 4th pin between be connected with resistance R 5, on the 5th described pin, be connected with ground capacity C1, the 3rd pin of described chip PS9714 and the equal ground connection of the 2nd pin, on the 1st pin of described chip PS9714, be connected with resistance R 6, in described resistance R 6, be parallel with capacitor C 2, the 4th pin of described chip PS9714 is connected to by resistance R 2 in the base stage of triode T1, the grounded emitter of described triode T1, on the collector electrode of triode T1, be connected with resistance R 1, the other end of described resistance R 1 is connected on the anode of diode D1, the negative electrode of described diode D1 is connected on the negative electrode of diode D2, the plus earth of described diode D1, the anode of described diode D1 and the anode of diode D2 are all connected on interface unit.In the present invention, the output of time synchronized tester sends to chip PS9714 through resistance R 6, capacitor C 2 improves the reliability of circuit, spike is absorbed, chip PS9714 is optical coupler, and it uses forward drive, makes there is no signal when output chip PS9714 in non-luminance, reduce power consumption, and increase the service life.The triode T1 of rear class etc. form signal output OC door.Utilize the characteristic of optical coupler, suppress noise jamming ability strong, interference source and the part being easily disturbed keep apart, make time synchronized tester inside and the one-way transmission of output inhibit signal, can avoid the interference of external interference to time synchronized tester, to improve accuracy of detection and the accuracy of time synchronized tester.Diode D1 and diode D2 shield.Resistance R 5, capacitor C 1 are the peripheral circuit of chip PS9714, for the reliability service of chip PS9714 provides safeguard.
The 4th pin of described chip PS9714 is connected to by resistance R 3 in the base stage of triode T2, the emitter base of described triode T2, the collector electrode of described triode T2 is connected on the negative electrode of diode D3, the anode of described diode D3 is connected with power supply by resistance R 4, and described diode D3 is light-emitting diode.Utilize light-emitting diode to indicate the output of signal, when signal is in the time that optical coupler chip PS9714 is sent to the 4th pin, triode T2 conducting, light-emitting diode is lit.
Described interface unit is 2 faller gill mothers.The row of utilization is female to be connected output port, is convenient to time synchronized tester and is connected with external equipment.And being used in conjunction with of the row of utilization mother and socket, it is easy to connect, and price is convenient to.
Described resistance R 3 and the resistance of resistance R 2 equate.Because triode T1 and triode T2 are all connected on the 4th pin of chip PS9714, the signal driver triode T1 of the 4th pin and the conducting of triode T2, can use up the transmission status of reliable display in order to make the demonstration of light-emitting diode, the resistance phase of resistance R 3 and resistance R 2 can make the signal of the 4th pin make triode T1 and triode T2 conducting simultaneously.
In the present embodiment, as one group of preferred embodiment, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6 can be selected respectively 3 kilohms, 2 kilohms, 5 kilohms, 1.5 kilohms, 450 ohm, 300 ohm.Diode D1, diode D2 can select P6KE300CA.Capacitor C 1, capacitor C 2 all can adopt respectively 0.1 μ F.Emulation proves, adopts the electronic component of above-mentioned specifications and models, can make the performance of this circuit reach optimum.
Be as mentioned above embodiments of the invention.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, within all falling into protection scope of the present invention.
Claims (4)
- Interference resistance strong without source contact output interface circuit, it is characterized in that: it comprises chip PS9714, the 5th pin of described chip PS9714 be connected on power supply and the 5th pin and the 4th pin between be connected with resistance R 5, on the 5th described pin, be connected with ground capacity C1, the 3rd pin of described chip PS9714 and the equal ground connection of the 2nd pin, on the 1st pin of described chip PS9714, be connected with resistance R 6, in described resistance R 6, be parallel with capacitor C 2, the 4th pin of described chip PS9714 is connected to by resistance R 2 in the base stage of triode T1, the grounded emitter of described triode T1, on the collector electrode of triode T1, be connected with resistance R 1, the other end of described resistance R 1 is connected on the anode of diode D1, the negative electrode of described diode D1 is connected on the negative electrode of diode D2, the plus earth of described diode D1, the anode of described diode D1 and the anode of diode D2 are all connected on interface unit.
- Interference resistance according to claim 1 strong without source contact output interface circuit, it is characterized in that: the 4th pin of described chip PS9714 is connected to by resistance R 3 in the base stage of triode T2, the emitter base of described triode T2, the collector electrode of described triode T2 is connected on the negative electrode of diode D3, the anode of described diode D3 is connected with power supply by resistance R 4, and described diode D3 is light-emitting diode.
- Interference resistance according to claim 1 and 2 strong without source contact output interface circuit, it is characterized in that: described interface unit is 2 faller gill mothers.
- Interference resistance according to claim 2 strong without source contact output interface circuit, it is characterized in that: described resistance R 3 and the resistance of resistance R 2 equate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102207.XA CN103840815A (en) | 2014-03-19 | 2014-03-19 | Electrical independent contact output interface circuit with strong interference resistance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102207.XA CN103840815A (en) | 2014-03-19 | 2014-03-19 | Electrical independent contact output interface circuit with strong interference resistance |
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| CN103840815A true CN103840815A (en) | 2014-06-04 |
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| CN201410102207.XA Pending CN103840815A (en) | 2014-03-19 | 2014-03-19 | Electrical independent contact output interface circuit with strong interference resistance |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101246976A (en) * | 2008-03-25 | 2008-08-20 | 东南大学 | Lead acid accumulator charging method and charger thereof |
| CN201699682U (en) * | 2010-05-21 | 2011-01-05 | 深圳市易能电气技术有限公司 | Low-speed optical coupler accelerating circuit |
| US20120044015A1 (en) * | 2010-08-17 | 2012-02-23 | Invensys Systems Inc. | Universal Digital Input Module in a Process Automation Controller |
| CN103236835A (en) * | 2013-04-09 | 2013-08-07 | 浙江威星智能仪表股份有限公司 | Signal isolation grid circuit |
| CN203761364U (en) * | 2014-03-19 | 2014-08-06 | 成都引众数字设备有限公司 | Electrical independent contact output interface circuit |
-
2014
- 2014-03-19 CN CN201410102207.XA patent/CN103840815A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101246976A (en) * | 2008-03-25 | 2008-08-20 | 东南大学 | Lead acid accumulator charging method and charger thereof |
| CN201699682U (en) * | 2010-05-21 | 2011-01-05 | 深圳市易能电气技术有限公司 | Low-speed optical coupler accelerating circuit |
| US20120044015A1 (en) * | 2010-08-17 | 2012-02-23 | Invensys Systems Inc. | Universal Digital Input Module in a Process Automation Controller |
| CN103236835A (en) * | 2013-04-09 | 2013-08-07 | 浙江威星智能仪表股份有限公司 | Signal isolation grid circuit |
| CN203761364U (en) * | 2014-03-19 | 2014-08-06 | 成都引众数字设备有限公司 | Electrical independent contact output interface circuit |
Non-Patent Citations (1)
| Title |
|---|
| NEC: "PS9714", 《HTTP://WWW.ALLDATASHEET.COM/DATASHEET-PDF/PDF/87627/NEC/PS9714-V.HTML》 * |
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Application publication date: 20140604 |