CN201479113U - Trigger interface circuit irrespective of polarity - Google Patents
Trigger interface circuit irrespective of polarity Download PDFInfo
- Publication number
- CN201479113U CN201479113U CN2009201941399U CN200920194139U CN201479113U CN 201479113 U CN201479113 U CN 201479113U CN 2009201941399 U CN2009201941399 U CN 2009201941399U CN 200920194139 U CN200920194139 U CN 200920194139U CN 201479113 U CN201479113 U CN 201479113U
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- photoelectrical coupler
- polarity
- input
- output
- interface circuit
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Abstract
The utility model relates to the field of electronic circuits, particularly to a trigger interface circuit irrespective of polarity, which is especially suitable for connecting trigger control signal outputs irrespective of polarity of a pick-up probe. The trigger interface circuit comprises two optocoupler switching circuits and is connected with different positive and negative voltage ends respectively. When a direct current voltage is inputted, a diode inside one optocoupler of the two optocoupler circuits can illuminate to make a triode in a conducting state and turn to a low level. By adopting the technical scheme, the trigger interface circuit has a simple and reasonable circuit structure, can realize the trigger interface input irrespective of polarity and the automatic identification output, and is especially suitable for a voltage-output type probe interface.
Description
Technical field
The utility model relates to electronic circuit field, relates in particular to the not trigger interface circuit of polarity, is specially adapted to connect the triggering control signal output of the not polarity of pick-up probe.
Background technology
Existing detector major part is the voltage output type, generally is the triggering control signal of output dc voltage signal.But the triggering control signal polarity of the output port of different detectors designs differently.Generally can indicate the polarity of output signal at the output port place, if but adopt standard separately not have the polarity mark again, perhaps the polarity mark is because wears, before then connecting the interface circuit of triggering control signal output of detector, need judge again its polarity and insert, to guarantee the warning receiving circuit operate as normal of postorder.Generally can directly adopt universal instrument to detect, but cumbersome.
The utility model content
Therefore, the utility model proposes a kind of interface circuit, can realize the not trigger interface input of polarity, identification output automatically.
The technical solution of the utility model is:
The trigger interface circuit of polarity does not comprise 2 photoelectrical couplers compositions, wherein:
The positive pole of the input of the negative pole of the input of first photoelectrical coupler and second photoelectrical coupler all is connected in input first port, and the negative pole of the input of the positive pole of the input of first photoelectrical coupler and second photoelectrical coupler all is connected in input second port;
The equal ground connection of the negative pole of the input of the negative pole of the output of first photoelectrical coupler and second photoelectrical coupler, the positive pole of the input of the positive pole of the output of first photoelectrical coupler and second photoelectrical coupler all connects the high level end, and connects output.
Further, also comprise 2 current-limiting resistances, wherein
First current-limiting resistance is series in the circuit of first port and first photoelectrical coupler or second photoelectrical coupler,
First current-limiting resistance is series in the circuit of positive pole of output of high level and first photoelectrical coupler or second photoelectrical coupler.
Perhaps, first current-limiting resistance is series in the circuit of second port and first photoelectrical coupler or second photoelectrical coupler,
First current-limiting resistance is series in the circuit of positive pole of output of high level and first photoelectrical coupler or second photoelectrical coupler.
The utility model adopts as above technical scheme, is a kind of interface circuit of circuit structure advantages of simple, can realize the not trigger interface input of polarity, and identification is exported automatically, is particularly useful for the prober interface of voltage output type.
Description of drawings
Fig. 1 is the circuit theory diagrams of embodiment of the present utility model.
Embodiment
Now with embodiment the utility model is further specified in conjunction with the accompanying drawings.
Consulting shown in Figure 1 is an embodiment of the present utility model, and it comprises that 2 photoelectrical couplers and 2 current-limiting resistances form, wherein
The positive pole of the input of the negative pole of the input of the first photoelectrical coupler U1 and the second photoelectrical coupler U1 all is connected in the input first port L1, and the negative pole of the input of the positive pole of the input of the first photoelectrical coupler U1 and the second photoelectrical coupler U1 all is connected in the input second port L2;
The equal ground connection of the negative pole of the input of the negative pole of the output of the first photoelectrical coupler U1 and the second photoelectrical coupler U1, the positive pole of the input of the positive pole of the output of the first photoelectrical coupler U1 and the second photoelectrical coupler U1 all connects the high level end, and connects output I/O.
The first current-limiting resistance R1 is series in the circuit of the second port L2 and the first photoelectrical coupler U1 or the second photoelectrical coupler U1;
The first current-limiting resistance R1 is series in the circuit of positive pole of output of high level and the first photoelectrical coupler U1 or the second photoelectrical coupler U1.
The circuit theory of the utility model embodiment is: when the first port L1 for just, when the second port L2 is negative, through current-limiting resistance R1 current limliting, the second photoelectrical coupler U2 conducting, output I/O low level output, when the second port L2 for just, when the first port L1 is negative, through current-limiting resistance R1 current limliting, the first photoelectrical coupler U1 conducting, output I/O also produces low level output.Be regardless of both positive and negative polarity when input thereby reach the first port L1, the second port L2, the first photoelectrical coupler U1, the second photoelectrical coupler U2 all can realize low level output.In other words, i.e. the output of detector has the triggering control signal of the direct current of voltage difference, and output I/O also produces low level output, thus the warning receiving circuit work that the low level of postorder is enabled.Enable to trigger if the warning receiving circuit is a low level, then adding a logic inverter circuit behind the circuit of the utility model embodiment can realize.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; can make various variations to the utility model in the form and details, be protection range of the present utility model.
Claims (3)
1. the trigger interface circuit of polarity not, it is characterized in that: comprise 2 photoelectrical couplers compositions, wherein the positive pole of the input of the negative pole of the input of first photoelectrical coupler (U1) and second photoelectrical coupler (U1) all is connected in input first port (L1), and the negative pole of the input of the positive pole of the input of first photoelectrical coupler (U1) and second photoelectrical coupler (U1) all is connected in input second port (L2);
The equal ground connection of negative pole of the input of the negative pole of the output of first photoelectrical coupler (U1) and second photoelectrical coupler (U1), the positive pole of the input of the positive pole of the output of first photoelectrical coupler (U1) and second photoelectrical coupler (U1) all connects the high level end, and connects output (I/O).
2. the trigger interface circuit of not polarity according to claim 1 is characterized in that: also comprise 2 current-limiting resistances, wherein
First current-limiting resistance (R1) is series in the circuit of first port (L1) and first photoelectrical coupler (U1) or second photoelectrical coupler (U1),
First current-limiting resistance (R1) is series in the circuit of positive pole of output of high level and first photoelectrical coupler (U1) or second photoelectrical coupler (U1).
3. the trigger interface circuit of not polarity according to claim 1 is characterized in that: also comprise 2 current-limiting resistances, wherein
First current-limiting resistance (R1) is series in the circuit of second port (L2) and first photoelectrical coupler (U1) or second photoelectrical coupler (U1),
First current-limiting resistance (R1) is series in the circuit of positive pole of output of high level and first photoelectrical coupler (U1) or second photoelectrical coupler (U1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201941399U CN201479113U (en) | 2009-09-02 | 2009-09-02 | Trigger interface circuit irrespective of polarity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201941399U CN201479113U (en) | 2009-09-02 | 2009-09-02 | Trigger interface circuit irrespective of polarity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201479113U true CN201479113U (en) | 2010-05-19 |
Family
ID=42415367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201941399U Expired - Fee Related CN201479113U (en) | 2009-09-02 | 2009-09-02 | Trigger interface circuit irrespective of polarity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201479113U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012106953A1 (en) * | 2011-02-12 | 2012-08-16 | 中兴通讯股份有限公司 | Device and method for detecting state of overload and overcurrent protector |
| CN103914008A (en) * | 2012-12-31 | 2014-07-09 | 硅实验室公司 | Apparatus for integrated circuit interface and associated methods |
| CN109655702A (en) * | 2018-12-20 | 2019-04-19 | 安徽优旦科技有限公司 | A kind of open circuit detection system |
-
2009
- 2009-09-02 CN CN2009201941399U patent/CN201479113U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012106953A1 (en) * | 2011-02-12 | 2012-08-16 | 中兴通讯股份有限公司 | Device and method for detecting state of overload and overcurrent protector |
| EP2662696A4 (en) * | 2011-02-12 | 2015-06-03 | Zte Corp | Device and method for detecting state of overload and overcurrent protector |
| US9116211B2 (en) | 2011-02-12 | 2015-08-25 | Zte Corporation | Device and method for detecting state of overload and overcurrent protector |
| CN103914008A (en) * | 2012-12-31 | 2014-07-09 | 硅实验室公司 | Apparatus for integrated circuit interface and associated methods |
| CN103914008B (en) * | 2012-12-31 | 2021-02-26 | 硅实验室公司 | Apparatus, and associated method, for integrated circuit interface |
| CN109655702A (en) * | 2018-12-20 | 2019-04-19 | 安徽优旦科技有限公司 | A kind of open circuit detection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20120902 |