CN103873045A - Active contact output interface circuit - Google Patents
Active contact output interface circuit Download PDFInfo
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- CN103873045A CN103873045A CN201410102212.0A CN201410102212A CN103873045A CN 103873045 A CN103873045 A CN 103873045A CN 201410102212 A CN201410102212 A CN 201410102212A CN 103873045 A CN103873045 A CN 103873045A
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Abstract
The invention discloses an active contact output interface circuit which comprises a chip PS9714. A first pin of the chip PS9714 is connected with a resistor R8, a fourth pin of the chip PS9714 is connected with the base of a triode T1 through a resistor R5, the collector of the triode T1 is connected with a power source through a resistor R2, a resistor R1 is connected to the resistor R2 in series, the common end of the resistor R1 and the power source is connected to the anode of a diode D1, the cathode of the diode D1 is connected with the cathode of a diode D2, the anode of the diode D1 is grounded, a resistor R3 is connected between the anode of the diode D2 and the emitter of the triode T1, a fifth pin of the chip PS9714 is connected with a ground capacitor C1, and a resistor R7 is connected between the fourth pin and the fifth pin of the chip PS9714. The active contact output interface circuit has the advantages that the active contact output interface circuit is an active circuit, interference at the output end is isolated through an optical coupler, and the detection accuracy of a time synchronization calibration instrument is improved.
Description
Technical field
The present invention relates to a kind of output interface circuit, relating in particular one has 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 one has source contact output interface circuit, and it is active circuit, adopts optical coupler to isolate the interference of output, improves the resistivity of disturbing to external world of time synchronized tester, improves the accuracy in detection of time synchronized tester.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
One has source contact output interface circuit, it comprises chip PS9714, on the 1st pin of described chip PS9714, be connected with resistance R 8, the 4th pin of described chip PS9714 is connected with the base stage of triode T1 by resistance R 5, the grounded emitter of described triode T1, the collector electrode of described triode T1 is connected with power supply by resistance R 2, in described resistance R 2, be in series with resistance R 1, described resistance R 1 is connected on the anode of diode D1 with the common port of power supply, the negative electrode of described diode D1 is connected with the negative electrode of diode D2, the plus earth of described diode D2, between the anode of described diode D2 and the emitter of triode T1, be connected with resistance R 3, the two ends of described resistance R 2 are all connected on interface device, on the 5th pin of described chip PS9714, be connected with capacitor C 1, the other end ground connection of described capacitor C 1, between the 4th pin of described chip PS9714 and the 5th pin, be connected with resistance R 7.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, on described chip PS9714, be connected with signal output indicating circuit.
Further, described signal output indicating circuit comprises triode T2 and diode D3, the 4th pin of described chip PS9714 is connected with the base stage of triode T2 by resistance R 6, the grounded emitter 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.
As preferably, described interface device is 2 faller gill mothers.
As preferably, in described resistance R 8, be parallel with capacitor C 2.
Compared with prior art, the invention has the beneficial effects as follows:
The active output of employing of the present invention, it utilizes optical coupler to isolate time synchronized tester and external interference, utilize the one-way of the signal transmission of optical coupler, reach the object of isolation external interference, effectively 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]
One as shown in Figure 1 has source contact output interface circuit, it comprises chip PS9714, on the 1st pin of described chip PS9714, be connected with resistance R 8, the 4th pin of described chip PS9714 is connected with the base stage of triode T1 by resistance R 5, the grounded emitter of described triode T1, the collector electrode of described triode T1 is connected with power supply by resistance R 2, in described resistance R 2, be in series with resistance R 1, described resistance R 1 is connected on the anode of diode D1 with the common port of power supply, the negative electrode of described diode D1 is connected with the negative electrode of diode D2, the plus earth of described diode D2, between the anode of described diode D2 and the emitter of triode T1, be connected with resistance R 3, the two ends of described resistance R 2 are all connected on interface device, on the 5th pin of described chip PS9714, be connected with capacitor C 1, the other end ground connection of described capacitor C 1, between the 4th pin of described chip PS9714 and the 5th pin, be connected with resistance R 7.In the present invention, utilize power supply to power to triode T1, the output of time synchronized tester sends to chip PS9714 through resistance R 8, chip PS9714 is optical coupler, it uses forward drive, make chip PS9714 in the time there is no signal output 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.When time synchronization check instrument is after resistance R 8 outputs, on optical coupler, form the conversion of electrical-optical-electricity, optical coupler the 4th pin output signal drives triode T1 conducting, forms signal output in resistance R 2.Interface device is conducive to time synchronized tester and is connected with external equipment.Diode D1 and diode D2 shield.Resistance R 7, capacitor C 1 are the peripheral circuit of chip PS9714, for the reliability service of chip PS9714 provides safeguard.
On described chip PS9714, be connected with signal output indicating circuit.Signal indicating circuit is indicated the output signal of time synchronized tester, in the time having signal output, utilizes corresponding action to give prompting.
Described signal output indicating circuit comprises triode T2 and diode D3, the 4th pin of described chip PS9714 is connected with the base stage of triode T2 by resistance R 6, the grounded emitter 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 output 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 device 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.
In described resistance R 8, be parallel with capacitor C 2.Spike is absorbed, and capacitor C 2 improves the reliability of circuit.
In the present embodiment, as the embodiment of one group of optimum, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8 can adopt respectively the resistance of 100 ohm, 100 kilohms, 100 ohm, 1.5 kilohms, 1 ohm, 5 kilohms, 470 ohm, 300 ohm; Diode D1 and diode D2 can adopt P6KE300CA model.Capacitor C 1 and capacitor C 2 all can adopt the electric capacity of 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 (5)
1. one kind has source contact output interface circuit, it is characterized in that: it comprises chip PS9714, on the 1st pin of described chip PS9714, be connected with resistance R 8, the 4th pin of described chip PS9714 is connected with the base stage of triode T1 by resistance R 5, the grounded emitter of described triode T1, the collector electrode of described triode T1 is connected with power supply by resistance R 2, in described resistance R 2, be in series with resistance R 1, described resistance R 1 is connected on the anode of diode D1 with the common port of power supply, the negative electrode of described diode D1 is connected with the negative electrode of diode D2, the plus earth of described diode D2, between the anode of described diode D2 and the emitter of triode T1, be connected with resistance R 3, the two ends of described resistance R 2 are all connected on interface device, on the 5th pin of described chip PS9714, be connected with capacitor C 1, the other end ground connection of described capacitor C 1, between the 4th pin of described chip PS9714 and the 5th pin, be connected with resistance R 7.
2. one according to claim 1 has source contact output interface circuit, it is characterized in that: on described chip PS9714, be connected with signal output indicating circuit.
3. one according to claim 2 has source contact output interface circuit, it is characterized in that: described signal output indicating circuit comprises triode T2 and diode D3, the 4th pin of described chip PS9714 is connected with the base stage of triode T2 by resistance R 6, the grounded emitter 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.
4. one according to claim 1 has source contact output interface circuit, it is characterized in that: described interface device is 2 faller gill mothers.
5. one according to claim 1 has source contact output interface circuit, it is characterized in that: in described resistance R 8, be parallel with capacitor C 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102212.0A CN103873045A (en) | 2014-03-19 | 2014-03-19 | Active contact output interface circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102212.0A CN103873045A (en) | 2014-03-19 | 2014-03-19 | Active contact output interface circuit |
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| CN103873045A true CN103873045A (en) | 2014-06-18 |
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| CN201410102212.0A Pending CN103873045A (en) | 2014-03-19 | 2014-03-19 | Active contact output interface circuit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101002507A (en) * | 2004-07-23 | 2007-07-18 | 三多尼克爱特克两合股份有限公司 | Interface circuit for transmission of digital signals |
| CN101246976A (en) * | 2008-03-25 | 2008-08-20 | 东南大学 | Lead acid accumulator charging method and charger thereof |
| 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 |
| CN203933596U (en) * | 2014-03-19 | 2014-11-05 | 成都引众数字设备有限公司 | There is source contact output interface circuit |
-
2014
- 2014-03-19 CN CN201410102212.0A patent/CN103873045A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101002507A (en) * | 2004-07-23 | 2007-07-18 | 三多尼克爱特克两合股份有限公司 | Interface circuit for transmission of digital signals |
| CN101246976A (en) * | 2008-03-25 | 2008-08-20 | 东南大学 | Lead acid accumulator charging method and charger thereof |
| 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 |
| CN203933596U (en) * | 2014-03-19 | 2014-11-05 | 成都引众数字设备有限公司 | There is source contact output interface circuit |
Non-Patent Citations (1)
| Title |
|---|
| 黄洪: "时间校验仪的校准方案", 《上海计量测试》 * |
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Application publication date: 20140618 |
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