CN203311210U - Photoelectric isolating circuit used for microcomputer interface - Google Patents
Photoelectric isolating circuit used for microcomputer interface Download PDFInfo
- Publication number
- CN203311210U CN203311210U CN2013203887164U CN201320388716U CN203311210U CN 203311210 U CN203311210 U CN 203311210U CN 2013203887164 U CN2013203887164 U CN 2013203887164U CN 201320388716 U CN201320388716 U CN 201320388716U CN 203311210 U CN203311210 U CN 203311210U
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- photoelectric
- isolating circuit
- circuit used
- photoelectric isolating
- interface
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Abstract
The utility model provides a photoelectric isolating circuit used for a microcomputer interface. The photoelectric isolating circuit used for the microcomputer interface includes a photoelectric isolator. A positive electrode of a light emitting diode in the photoelectric isolator is connected with an input terminal through a first resistor R1. A negative electrode of the light emitting diode in the photoelectric isolator is in ground connection. A transmitting electrode of a photosensitive triode in the photoelectric isolator is connected with a DC power source. A collector electrode of the photosensitive triode in the photoelectric isolator is connected with an output terminal of a second resistor R2. The utility model aims to provide the photoelectric isolating circuit used for the microcomputer interface and the photoelectric isolating circuit used for the microcomputer interface employs a photoelectric coupler as an interface and blocking signals and noise.
Description
Technical field
The utility model relates to a kind of photoelectric isolating circuit of Interface of Computer.
Background technology
Microcomputer has a plurality of input ports, receives the status signal transmitted from the distant place field apparatus, and microcomputer is exported various control signals and gone to carry out corresponding operation after these signals are processed.When environment is more severe at the scene, can exist larger noise to disturb, if these undesired signals enter microsystem with input signal, can make the precise control reduction, produce misoperation.
The utility model content
For solving the problems of the technologies described above, the utility model provides a kind of and adopts that photoelectrical coupler is done interface, the photoelectric isolating circuit of a kind of Interface of Computer that signal and noise are isolated.
The photoelectric isolating circuit of a kind of Interface of Computer of the utility model, comprise photoisolator, light emitting diode in described photoisolator is anodal to be connected with input end by the first resistance R 1, the minus earth of the light emitting diode in described photoisolator, the emitter of the phototriode in described photoisolator is connected with DC power anode, and the collector of the phototriode in photoisolator is connected with output terminal by the second resistance R 2.
The photoelectric isolating circuit of a kind of Interface of Computer of the utility model, the voltage of described direct supply are 5 volts.
The photoelectric isolating circuit of a kind of Interface of Computer of the utility model, when input end is high level, the light emitting diode conducting is luminous, and phototriode detects light source, its emitter and collector conducting, output terminal output high level; And work as input end, be low level, light emitting diode is not luminous, the not conducting of phototriode emitter and collector, output terminal output low level.Can be used on the input and output side of microcomputer, input end and output terminal have been realized electrical isolation fully, and antijamming capability is strong, long service life, and transfer efficiency is high.
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.Following examples are used for the utility model is described, but are not used for limiting scope of the present utility model.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of the photoelectric isolating circuit of a kind of Interface of Computer of the present utility model.
Embodiment
As shown in Figure 1, the photoelectric isolating circuit of a kind of Interface of Computer of the present utility model, comprise photoisolator, light emitting diode in photoisolator is anodal to be connected with input end by the first resistance R 1, the minus earth of the light emitting diode in photoisolator, the emitter of the phototriode in photoisolator is connected with 5 volts of DC power anodes, and the collector of the phototriode in photoisolator is connected with output terminal by the second resistance R 2.
This circuit is mainly used in the numerical digit signal output of " A/D converter ", and the control signal to forward path of being sent by CPU and the interface place of analogous circuit, thereby when realizing that signal path links between different system, isolation mutually on electric path, and realize on this basis analogous circuit sum digit circuit is isolated mutually, play the effect that suppresses cross-talk.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (2)
1. the photoelectric isolating circuit of an Interface of Computer, it is characterized in that: comprise photoisolator, light emitting diode in described photoisolator is anodal to be connected with input end by the first resistance (R1), the minus earth of the light emitting diode in described photoisolator, the emitter of the phototriode in described photoisolator is connected with DC power anode, and the collector of the phototriode in photoisolator is connected with output terminal by the second resistance (R2).
2. the photoelectric isolating circuit of a kind of Interface of Computer according to claim 1, it is characterized in that: the voltage of described direct supply is 5 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203887164U CN203311210U (en) | 2013-07-02 | 2013-07-02 | Photoelectric isolating circuit used for microcomputer interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203887164U CN203311210U (en) | 2013-07-02 | 2013-07-02 | Photoelectric isolating circuit used for microcomputer interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203311210U true CN203311210U (en) | 2013-11-27 |
Family
ID=49617407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203887164U Expired - Fee Related CN203311210U (en) | 2013-07-02 | 2013-07-02 | Photoelectric isolating circuit used for microcomputer interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203311210U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669503A (en) * | 2018-12-13 | 2019-04-23 | 朱嘉慧 | Isolated amplifier and its controlled ratio source and integral controlled source and mutual coupling device |
-
2013
- 2013-07-02 CN CN2013203887164U patent/CN203311210U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669503A (en) * | 2018-12-13 | 2019-04-23 | 朱嘉慧 | Isolated amplifier and its controlled ratio source and integral controlled source and mutual coupling device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20170702 |