CN203310514U - Photoelectric detection and control circuit - Google Patents
Photoelectric detection and control circuit Download PDFInfo
- Publication number
- CN203310514U CN203310514U CN2013203206967U CN201320320696U CN203310514U CN 203310514 U CN203310514 U CN 203310514U CN 2013203206967 U CN2013203206967 U CN 2013203206967U CN 201320320696 U CN201320320696 U CN 201320320696U CN 203310514 U CN203310514 U CN 203310514U
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- operational amplifier
- control circuit
- inverting input
- photoelectric
- examination control
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Abstract
The utility model is suitable for the photoelectric technology field and provides a photoelectric detection and control circuit comprising a photoelectric converter, an operational amplifier and a comparator, wherein the photoelectric converter is used for converting received optical signals into electric signals, the operational amplifier is used for subjecting the electric signals to amplification processing operation, a feedback resistor is connected between the inverting input end and the output end of the operational amplifier, the two ends of the photoelectric converter are respectively connected with the non-inverting input end and the inverting input end of the operational amplifier, the comparator is used for comparing and processing the electric signals output by the operational amplifier, and the comparator is connected with the output end of the operational amplifier. Preferably, a compensation capacitor is connected in parallel at the two ends of the feedback resistor and is used for phase compensation of the electric signals. Thus, the photoelectric detection and control circuit is advantaged by improvement of circuit stability, maintenance of a wide bandwidth range, and realization of quick and accurate optical and electrical signal conversion comparison.
Description
Technical field
The utility model relates to field of photoelectric technology, relates in particular to a kind of the photoelectrical examination control circuit.
Background technology
Photoelectric switching circuit is the conversion bridge between fundamental physical quantity and amount of electrons.In the optical field of development in future, it is the requisite part of opto-electronic conversion.How improving efficiency and the accuracy of conversion, is an important indicator considering photoelectric switching circuit.
Existing change-over circuit, be all the circuit structure adopted as shown in Figure 1 mostly, and it uses the photoelectric conversion mode of trsanscondutance amplifier.But owing in photodetection, there being the interpolar distributed capacitance, also there is input capacitance in operational amplifier, and photodetector and amplifier all exist interelectrode capacity to distribute, these total capacitances and feedback resistance R6 can form a lag network, can cause that the output voltage phase place lags behind, easily make operational amplifier produce self-sustained oscillation.
In summary, existing the photoelectrical examination control circuit, obviously exist inconvenience and defect in actual use, improved so be necessary.
The utility model content
For above-mentioned defect, the purpose of this utility model is to provide a kind of the photoelectrical examination control circuit, and it not only can improve the stability of circuit, can also keep very wide bandwidth range, and can quick and precisely carry out the photosignal conversion relatively.
To achieve these goals, the utility model provides a kind of the photoelectrical examination control circuit, comprising:
For the light signal that will receive, be converted to the photoelectric commutator of electric signal;
For described electric signal being amplified to the operational amplifier of processing, between the inverting input of described operational amplifier and output terminal, be connected with feedback resistance, described photoelectric commutator two ends connect respectively normal phase input end and the inverting input of described operational amplifier;
For the comparer of comparison process by the electric signal of described operational amplifier output, be connected in the output terminal of described operational amplifier.
According to the photoelectrical examination control circuit of the present utility model, described feedback resistance two ends also are connected to one for the building-out capacitor to described electrical signal phase compensation.
According to the photoelectrical examination control circuit of the present utility model, described comparer is connected with the reference voltage regulating circuit.
According to the photoelectrical examination control circuit of the present utility model, described reference voltage regulating circuit comprises constant resistance and the adjustable resistance be used to the size of regulating described reference voltage.
According to the photoelectrical examination control circuit of the present utility model, described photoelectric commutator is photodiode.
The utility model, by between the normal phase input end at operational amplifier and inverting input, connecting a photoelectric commutator, makes its electric signal that can receive the photoelectric commutator conversion, and electric signal is amplified and processes.Between the inverting input of operational amplifier and input end, be connected with feedback resistance, make the circuit can well feedback regulation.The output terminal of operational amplifier connects a comparer, and this comparer can be by the electric signal of reference voltage comparison process operational amplifier output.Preferably, the feedback resistance two ends also are connected to a building-out capacitor, can greatly improve the stability of circuit, comparer also can by regulate reference voltage with obtain the different light intensity degree comparative effectiveness, judge fast whereby the size of light signal.
The accompanying drawing explanation
Fig. 1 is the structural representation of the photoelectric switching circuit of prior art;
Fig. 2 is the structural representation of the photoelectrical examination control circuit of the present utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Referring to Fig. 2, the utility model provides a kind of the photoelectrical examination control circuit, and it comprises photoelectric commutator PD, operational amplifier U1A and comparer U2A, wherein:
The two ends of photoelectric commutator PD are normal phase input end and the inverting input of concatenation operation amplifier U1A respectively, this photoelectric commutator PD can be photodiode, for the light signal that will receive, be converted to electric signal, and electric signal is sent to operational amplifier U1A processing.
Described operational amplifier U1A amplifies and processes for the electric signal that will receive.This operational amplifier U1A is that differential is processed structure, between its inverting input and output terminal, is connected with feedback resistance R6, makes the circuit can well feedback regulation.Preferably, in the present embodiment, the stability of circuit also and be connected to building-out capacitor C3, for described electric signal is carried out to phase compensation, is improved whereby greatly in the two ends of feedback resistance R6, can also keep very wide bandwidth range.
The input end of comparer U2A is by the output of resistance R 1 concatenation operation amplifier U1A, and another input end connects reference voltage, can to the electric signal that operational amplifier U1A exports, compare processing by reference voltage whereby.
Preferably, comparer U2A is connected with the reference voltage regulating circuit, and it comprises constant resistance R2 and adjustable resistance R5, by R5 being regulated to the benchmark voltage that can regulate comparer U2A, can obtain whereby the comparative effectiveness of different light intensities.By comparer U2A, can accurately carry out the photosignal conversion relatively, judge fast the size of light signal, from higher level signal of comparer U2A output, thereby can reach larger distance signal transmission, and by this signal, can do control signal and use.
A course of work of the present utility model is as follows: when photoelectric commutator PD receives light signal, light signal is converted to faint voltage signal, from photoelectric commutator PD voltage signal out, through the differential of operational amplifier U1A, amplify the Voltage-output that obtained after processing, this output voltage is relatively exported by a voltage comparator U2A.Comparer U2A can, by changing the magnitude of voltage size of comparison point, obtain the comparative effectiveness of different light intensities.
In sum, utility model, by between the normal phase input end at operational amplifier and inverting input, connecting a photoelectric commutator, makes its electric signal that can receive the photoelectric commutator conversion, and electric signal is amplified and processes.Between the inverting input of operational amplifier and input end, be connected with feedback resistance, make the circuit can well feedback regulation.The output terminal of operational amplifier connects a comparer, and this comparer can be by the electric signal of reference voltage comparison process operational amplifier output.Preferably, the feedback resistance two ends also are connected to a building-out capacitor, can greatly improve the stability of circuit, comparer also can by regulate reference voltage with obtain the different light intensity degree comparative effectiveness, judge fast whereby the size of light signal.
Certainly; the utility model also can have other various embodiments; in the situation that do not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art are when making various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (5)
1. a photoelectrical examination control circuit, is characterized in that, comprising:
For the light signal that will receive, be converted to the photoelectric commutator of electric signal;
For described electric signal being amplified to the operational amplifier of processing, between the inverting input of described operational amplifier and output terminal, be connected with feedback resistance, described photoelectric commutator two ends connect respectively normal phase input end and the inverting input of described operational amplifier;
For the comparer of comparison process by the electric signal of described operational amplifier output, be connected in the output terminal of described operational amplifier.
2. the photoelectrical examination control circuit according to claim 1, is characterized in that, described feedback resistance two ends also are connected to one for the building-out capacitor to described electrical signal phase compensation.
3. the photoelectrical examination control circuit according to claim 2, is characterized in that, described comparer is connected with the reference voltage regulating circuit.
4. the photoelectrical examination control circuit according to claim 3, is characterized in that, described reference voltage regulating circuit comprises constant resistance and the adjustable resistance be used to the size of regulating described reference voltage.
5. according to the described the photoelectrical examination control circuit of claim 1～4 any one, it is characterized in that, described photoelectric commutator is photodiode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203206967U CN203310514U (en) | 2013-06-05 | 2013-06-05 | Photoelectric detection and control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203206967U CN203310514U (en) | 2013-06-05 | 2013-06-05 | Photoelectric detection and control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203310514U true CN203310514U (en) | 2013-11-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203206967U Expired - Fee Related CN203310514U (en) | 2013-06-05 | 2013-06-05 | Photoelectric detection and control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN203310514U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323110A (en) * | 2013-06-05 | 2013-09-25 | 深圳市创鑫激光技术有限公司 | Photoelectric detection control circuit |
| CN103900686A (en) * | 2014-04-15 | 2014-07-02 | 电子科技大学 | Pre-stage amplifying circuit for high-speed photoelectric detector |
-
2013
- 2013-06-05 CN CN2013203206967U patent/CN203310514U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323110A (en) * | 2013-06-05 | 2013-09-25 | 深圳市创鑫激光技术有限公司 | Photoelectric detection control circuit |
| CN103900686A (en) * | 2014-04-15 | 2014-07-02 | 电子科技大学 | Pre-stage amplifying circuit for high-speed photoelectric detector |
| CN103900686B (en) * | 2014-04-15 | 2015-11-25 | 电子科技大学 | A kind of preamplifying circuit for high-speed photodetector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 518103, Guangdong, Shenzhen, Baoan District manhole street and a community third industrial zone, Ming Xin Industrial Park, first, third, B Patentee after: MAXPHOTONICS Co.,Ltd. Address before: 518000, Guangdong, Baoan District, Shenzhen manhole, South Ring Road and a community third industrial zone, Ming Xin Industrial Park, first, third, B Patentee before: Maxphotonics Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131127 Termination date: 20170605 |
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| CF01 | Termination of patent right due to non-payment of annual fee |