CN212060894U - Signal uploading circuit based on linear optocoupler diode - Google Patents
Signal uploading circuit based on linear optocoupler diode Download PDFInfo
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- CN212060894U CN212060894U CN201921988708.7U CN201921988708U CN212060894U CN 212060894 U CN212060894 U CN 212060894U CN 201921988708 U CN201921988708 U CN 201921988708U CN 212060894 U CN212060894 U CN 212060894U
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Abstract
The utility model belongs to the technical field of electric power, concretely relates to circuit is uploaded to signal based on linear opto-coupler diode. The light emitting intensity of the first light emitting diode can change along with the change of the voltage value at the output end of the first operational amplifier, so that the current signal generated after the second photosensitive diode is irradiated by the light emitted by the first light emitting diode also changes along with the voltage value at the output end, and the change of the output current signal and the change of the input voltage signal form a linear relation, thereby converting the voltage signal into the current signal more accurately.
Description
Technical Field
The utility model belongs to the technical field of electric power, concretely relates to circuit is uploaded to signal based on linear opto-coupler diode.
Background
With the rapid development of modern industry, people have higher and higher requirements on the processing precision of signal processing chips, so how to more accurately process signals becomes a technical problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems in the related art, a signal uploading circuit based on a linear optocoupler diode is provided.
According to an aspect of the embodiments of the present disclosure, a signal uploading circuit based on a linear optical coupler diode is provided, which includes: a signal conversion circuit;
the signal conversion circuit includes: the LED driving circuit comprises a first operational amplifier, a second operational amplifier, a light emitting diode, a first capacitor, a second capacitor, a first triode, a second triode, a first photosensitive diode, a second photosensitive diode and a first auxiliary power supply, wherein the first triode is of a PNP type, and the second triode is of an NPN type;
the reverse input end of the first operational amplifier is connected with the signal input end and used for receiving a voltage signal to be processed, one pole of the first capacitor is connected with the reverse input end of the first operational amplifier, the other pole of the first capacitor is connected with the output end of the first operational amplifier, the output end of the first operational amplifier is also connected with the anode of the light emitting diode and the base of the first triode respectively, the cathode of the light emitting diode is connected with the emitter of the first triode, the collector of the first triode is connected with the forward input end of the first operational amplifier, the cathode of the first photodiode is connected with the reverse input end of the first operational amplifier, and the anode of the first photodiode is connected with the forward input end of the first operational amplifier;
the positive input end of the second operational amplifier is connected with the positive electrode of the second photosensitive diode, the reverse input end of the second operational amplifier is respectively connected with the negative electrode of the second photosensitive diode and one electrode of the second capacitor, the output end of the second operational amplifier is respectively connected with the other electrode of the second capacitor and the base electrode of the second triode, the collector electrode of the second triode is connected with the first auxiliary power supply, and the emitter electrode of the second triode is used for outputting the processed electric signal.
In a possible implementation manner, the signal uploading circuit based on a linear optocoupler diode further includes: a variable resistor in parallel with the second photodiode.
In a possible implementation manner, the signal uploading circuit based on a linear optocoupler diode further includes: a voltage follower connected between the signal input and the signal conversion circuit.
In one possible implementation, the signal conversion circuit further includes: and the second auxiliary power supply is respectively connected with the base electrode of the first triode and the anode of the light-emitting diode.
In one possible implementation, the voltage of the second auxiliary power supply is 12 volts.
In one possible implementation, the voltage of the first auxiliary power supply is 24 volts.
The beneficial effects of the utility model reside in that: the light emitting diode can convert the voltage signal of the input end into an optical signal, the change of the light intensity of the optical signal can change along with the change of the voltage value of the voltage signal, the second photosensitive diode can convert the received optical signal into a current signal, the change of the current value of the current signal can change along with the change of the optical signal, and therefore the change of the output current signal and the change of the input voltage signal form a linear relation, and the voltage signal is accurately converted into the current signal.
Drawings
Fig. 1 is a signal conversion circuit of a signal uploading circuit based on a linear optocoupler diode, according to an exemplary embodiment.
Fig. 2 is a block diagram illustrating a signal upload circuit based on a linear optocoupler diode according to an example embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a signal conversion circuit of a signal uploading circuit based on a linear optocoupler diode, according to an exemplary embodiment. As shown in fig. 1, the signal uploading circuit based on the linear optocoupler diode may include: a signal conversion circuit, the signal conversion circuit may include: the power supply comprises a first operational amplifier A1, a second operational amplifier A2, a light emitting diode D0, a first capacitor C1, a second capacitor C2, a first triode Q1, a second triode Q2, a first photosensitive diode D1, a second photosensitive diode D2, a first auxiliary power supply V1, a PNP type first triode Q1 and an NPN type second triode Q2;
the reverse input end of the first operational amplifier a1 may be connected to a signal input end for receiving a voltage signal to be processed, one pole of the first capacitor C1 is connected to the reverse input end of the first operational amplifier a1, the other pole of the first capacitor C1 is connected to the output end of the first operational amplifier a1, the output end of the first operational amplifier a1 is further connected to the anode of the light emitting diode D0 and the base of the first transistor Q1, the cathode of the light emitting diode D0 is connected to the emitter of the first transistor Q1, the collector of the first transistor Q1 is connected to the forward input end of the first operational amplifier a1, the cathode of the first photodiode D1 is connected to the reverse input end of the first operational amplifier a1, and the anode of the first photodiode D1 is connected to the forward input end of the first operational amplifier a 1.
A forward input terminal of the second operational amplifier a2 is connected to an anode of the second photodiode D2, a reverse input terminal of the second operational amplifier a2 is connected to a cathode of the second photodiode D2 and a pole of the second capacitor C2, respectively, an output terminal of the second operational amplifier a2 is connected to another pole of the second capacitor C2 and a base of the second transistor Q2, respectively, a collector of the second transistor Q2 may be connected to the first auxiliary power source V1, wherein the first auxiliary power source V1 may be used to supply power to the second operational amplifier a2, the second transistor Q2 may control a voltage of the second operational amplifier a2 at a preset voltage threshold, and an emitter of the second transistor Q2 may be used to output the processed electrical signal.
The light emitting diode D0 can convert the voltage signal of the input terminal into an optical signal, the light intensity of which can change with the change of the voltage value of the voltage signal, and the second photodiode D2 can convert the received optical signal into a current signal, the current value of which can change with the change of the optical signal, so that the change relationship between the output current signal and the input voltage signal can be changed linearly, and the voltage signal can be converted into the current signal more accurately.
The circuit formed by the first operational amplifier a1, the first capacitor C1 and the first photodiode D1 can be used for filtering and adjusting an input voltage signal, and the first triode Q1 can be used for performing overvoltage protection on the light emitting diode D0; the circuit formed by the second operational amplifier a2 and the second capacitor C2 can be used for filtering and adjusting the current signal output by the second photodiode D2.
In one possible implementation, the voltage signal to be processed may vary from 0 to 5 volts, for example, and the processed electrical signal output by the emitter of the second transistor Q2 may vary from 4 to 20 milliamps.
In a possible implementation manner, the signal uploading circuit based on the linear optocoupler diode further includes: and the variable resistor R1, the variable resistor R1 can be connected with the second photosensitive diode D2 in parallel, and is used for adjusting the resistance value of the variable resistor R1 according to requirements, so that the magnitude of the output electric signal is adjusted, and the change relation between the output current signal and the input voltage signal keeps a linear relation.
Fig. 2 is a block diagram illustrating a signal upload circuit based on a linear optocoupler diode according to an example embodiment. As shown in fig. 2, in a possible implementation manner, the signal uploading circuit based on a linear optocoupler diode may further include: a voltage follower may be connected between the signal input and the signal conversion circuit. The voltage follower can carry out isolation, buffering and filtering processing on an input voltage signal to be processed.
In a possible implementation manner, the signal conversion circuit may further include a second auxiliary power source V2, the second auxiliary power source V2 may be respectively connected to the anode of the light emitting diode D0 and the base of the first transistor Q1, the second auxiliary power source V2 may be configured to supply power to the light emitting diode D0, and the first transistor Q1 may be configured to control the voltage of the light emitting diode D0 at a preset voltage threshold.
In one possible implementation, the voltage of the first auxiliary power supply V1 may be 12 volts. The voltage of the second auxiliary power supply V2 may be 24 volts.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (6)
1. The utility model provides a circuit is uploaded to signal based on linear opto-coupler diode which characterized in that, circuit is uploaded to signal based on linear opto-coupler diode includes: a signal conversion circuit;
the signal conversion circuit includes: the LED driving circuit comprises a first operational amplifier, a second operational amplifier, a light emitting diode, a first capacitor, a second capacitor, a first triode, a second triode, a first photosensitive diode, a second photosensitive diode and a first auxiliary power supply, wherein the first triode is of a PNP type, and the second triode is of an NPN type;
the reverse input end of the first operational amplifier is connected with the signal input end and used for receiving a voltage signal to be processed, one pole of the first capacitor is connected with the reverse input end of the first operational amplifier, the other pole of the first capacitor is connected with the output end of the first operational amplifier, the output end of the first operational amplifier is also connected with the anode of the light emitting diode and the base of the first triode respectively, the cathode of the light emitting diode is connected with the emitter of the first triode, the collector of the first triode is connected with the forward input end of the first operational amplifier, the cathode of the first photodiode is connected with the reverse input end of the first operational amplifier, and the anode of the first photodiode is connected with the forward input end of the first operational amplifier;
the positive input end of the second operational amplifier is connected with the positive electrode of the second photosensitive diode, the reverse input end of the second operational amplifier is respectively connected with the negative electrode of the second photosensitive diode and one electrode of the second capacitor, the output end of the second operational amplifier is respectively connected with the other electrode of the second capacitor and the base electrode of the second triode, the collector electrode of the second triode is connected with the first auxiliary power supply, and the emitter electrode of the second triode is used for outputting the processed electric signal.
2. The linear optocoupler diode-based signal upload circuit of claim 1, further comprising: a variable resistor in parallel with the second photodiode.
3. The linear optocoupler diode-based signal upload circuit of claim 1, further comprising: a voltage follower connected between the signal input and the signal conversion circuit.
4. The linear optocoupler diode-based signal upload circuit of claim 1, wherein the signal conversion circuit further comprises: and the second auxiliary power supply is respectively connected with the base electrode of the first triode and the anode of the light-emitting diode.
5. The linear optocoupler diode-based signal upload circuit of claim 4, wherein the voltage of the second auxiliary power supply is 12 volts.
6. The linear optocoupler diode-based signal upload circuit of claim 1, wherein the voltage of the first auxiliary power supply is 24 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921988708.7U CN212060894U (en) | 2019-11-15 | 2019-11-15 | Signal uploading circuit based on linear optocoupler diode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921988708.7U CN212060894U (en) | 2019-11-15 | 2019-11-15 | Signal uploading circuit based on linear optocoupler diode |
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| Publication Number | Publication Date |
|---|---|
| CN212060894U true CN212060894U (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921988708.7U Active CN212060894U (en) | 2019-11-15 | 2019-11-15 | Signal uploading circuit based on linear optocoupler diode |
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| Country | Link |
|---|---|
| CN (1) | CN212060894U (en) |
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2019
- 2019-11-15 CN CN201921988708.7U patent/CN212060894U/en active Active
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