CN201876496U - Phase detection circuit - Google Patents
Phase detection circuit Download PDFInfo
- Publication number
- CN201876496U CN201876496U CN201020590175XU CN201020590175U CN201876496U CN 201876496 U CN201876496 U CN 201876496U CN 201020590175X U CN201020590175X U CN 201020590175XU CN 201020590175 U CN201020590175 U CN 201020590175U CN 201876496 U CN201876496 U CN 201876496U
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- optocoupler
- input end
- detecting circuit
- detection
- phase detecting
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Abstract
The utility model discloses a phase detection circuit, which comprises a detection chip. A detection port A/D of the detection chip is connected to a collector electrode output end of an optical coupler U1, the collector electrode output end of the optical coupler U1 is connected to a pull-high resistor R3, an emitter electrode output end of the optical coupler U1 is grounded, a first input end of the optical coupler U1 is connected with a resistor R2, the resistor R2 is connected with a resistor R1, the resistor R1 is connected with a diode D1, the diode D1 is connected with a detection end N, and a second end of the optical coupler U1 is grounded. The phase detection circuit is simple in structure and convenient to use.
Description
Technical field
The utility model relates to a kind of application circuit, is specifically related to a kind of phase detecting circuit.
Background technology
Existing phase detecting circuit is varied of a great variety, but most complex structure, the function complexity, and only need under the application scenario of function singleness at some, adopt the phase detecting circuit of complicated circuit construction to finish the phase-detection function of simple function often, cost can increase so on the one hand, in addition on the one hand, after circuit structure was in a single day complicated, its labile factor was behind so just reducing product percent of pass virtually also increasing.
The utility model content
For overcoming deficiency of the prior art, the purpose of this utility model is to provide a kind of phase detecting circuit simple in structure.
In order to solve the problems of the technologies described above, realize above-mentioned purpose, the utility model has adopted following technical scheme:
A kind of phase detecting circuit, comprise a detection chip, the detection port A/D of described detection chip is connected the collector output of an optocoupler U1, the collector output of optocoupler U1 connects a pull-up resistor R3, the emitter output head grounding of described optocoupler U1, and the first input end of described optocoupler U1 connects resistance R 2, described resistance R 2 connects resistance R 1, described resistance R 1 connects diode D1, described diode D1 joint detection end N, second input end grounding of described optocoupler U1.
Further, cross-over connection has a filter capacitor C2 between the collector output of described optocoupler U1 and the emitter output terminal.
Further, cross-over connection has a filter capacitor C1 between the first input end of described optocoupler U1 and second input end.
Further, cross-over connection has a tunnel diode D2 between the first input end of described optocoupler U1 and second input end.
The course of work of phase detecting circuit of the present utility model is as follows:
When test side N had voltage, voltage made collector output and the conducting of emitter output terminal of optocoupler U1 by diode D1 and resistance R 1, R2, and the voltage of the detection port A/D of detection chip just is lower than 3V so.Phase-detection, just often voltage is high, is judged to the phase place wrong when voltage is lower than 3V.
The utlity model has following advantage:
Phase detecting circuit of the present utility model is simple in structure, and is easy to use.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of instructions, below with preferred embodiment of the present utility model and conjunction with figs. describe in detail as after.Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the circuit theory diagrams of phase detecting circuit of the present utility model.
Number in the figure explanation: 1, the first input end of optocoupler U1,2, second input end of optocoupler U1,3, the emitter output terminal of optocoupler U1,4, the collector output of optocoupler U1,5, detection chip.
Embodiment
Below in conjunction with drawings and Examples technology implementation process of the present utility model is described further.
Referring to shown in Figure 1, a kind of phase detecting circuit, comprise a detection chip 5, the detection port A/D of described detection chip 5 is connected the collector output 4 of an optocoupler U1, the collector output 4 of optocoupler U1 connects a pull-up resistor R3, emitter output terminal 3 ground connection of described optocoupler U1, the first input end 1 of described optocoupler U1 connects resistance R 2, described resistance R 2 connects resistance R 1, described resistance R 1 connects diode D1, described diode D1 joint detection end N, second input end, 2 ground connection of described optocoupler U1.
Further, cross-over connection has a filter capacitor C2 between the collector output 4 of described optocoupler U1 and the emitter output terminal 3.
Further, cross-over connection has a filter capacitor C1 between the first input end 1 of described optocoupler U1 and second input end 2.
Further, cross-over connection has a tunnel diode D2 between the first input end 1 of described optocoupler U1 and second input end 2.
The foregoing description just is to allow the one of ordinary skilled in the art can understand content of the present utility model and enforcement according to this for technical conceive of the present utility model and characteristics being described, its objective is, can not limit protection domain of the present utility model with this.The variation or the modification of every equivalence of having done according to the essence of the utility model content all should be encompassed in the protection domain of the present utility model.
Claims (4)
1. phase detecting circuit, comprise a detection chip (5), it is characterized in that: the detection port A/D of described detection chip (5) is connected the collector output (4) of an optocoupler U1, the collector output of optocoupler U1 (4) connects a pull-up resistor R3, emitter output terminal (3) ground connection of described optocoupler U1, the first input end of described optocoupler U1 (1) connects resistance R 2, described resistance R 2 connects resistance R 1, described resistance R 1 connects diode D1, described diode D1 joint detection end N, second input end (2) ground connection of described optocoupler U1.
2. phase detecting circuit according to claim 1 is characterized in that: cross-over connection has a filter capacitor C2 between the collector output of described optocoupler U1 (4) and the emitter output terminal (3).
3. phase detecting circuit according to claim 1 is characterized in that: cross-over connection has a filter capacitor C1 between the first input end of described optocoupler U1 (1) and second input end (2).
4. phase detecting circuit according to claim 3 is characterized in that: cross-over connection has a tunnel diode D2 between the first input end of described optocoupler U1 (1) and second input end (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020590175XU CN201876496U (en) | 2010-11-03 | 2010-11-03 | Phase detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020590175XU CN201876496U (en) | 2010-11-03 | 2010-11-03 | Phase detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201876496U true CN201876496U (en) | 2011-06-22 |
Family
ID=44164412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020590175XU Expired - Fee Related CN201876496U (en) | 2010-11-03 | 2010-11-03 | Phase detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201876496U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012459A (en) * | 2010-11-03 | 2011-04-13 | 苏州合欣美电子科技有限公司 | Phase detection circuit |
-
2010
- 2010-11-03 CN CN201020590175XU patent/CN201876496U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012459A (en) * | 2010-11-03 | 2011-04-13 | 苏州合欣美电子科技有限公司 | Phase detection circuit |
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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: 20110622 Termination date: 20111103 |