CN205584175U - Linear optoelectronic coupler of high pressure - Google Patents
Linear optoelectronic coupler of high pressure Download PDFInfo
- Publication number
- CN205584175U CN205584175U CN201620435515.9U CN201620435515U CN205584175U CN 205584175 U CN205584175 U CN 205584175U CN 201620435515 U CN201620435515 U CN 201620435515U CN 205584175 U CN205584175 U CN 205584175U
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- resistance
- amplifier
- phototriode
- emitting diode
- inverting input
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Abstract
Linear optoelectronic coupler of high pressure belongs to the electric automatization field, the utility model discloses a not linear problem of output that the photounit of solving traditional optoelectronic coupler arouses along with the temperature variation. The utility model discloses a A1, A2, LED emitting diode D1, phototriode PD1, PD2, resistance R1~R3 and feedback capacitance C1 are put to fortune, the light that D1 sent is accepted simultaneously to PD1 and PD2's photosurface, vin is gone into to the A1 non inverting input termination, C1 one end and PD1 projecting pole are still connected through R1 ground connection to A1 inverting input end, the C1 other end and R2 one end are connected simultaneously to the A1 output, and the R2 other end passes through D1 ground connection, the PD1 collecting electrode vcc1 that connects, PD2 projecting pole and R3 one end are connected simultaneously to the A2 non inverting input end, R3 other end ground connection, the PD2 collecting electrode vcc2 that connects, the A2 output is connected to A2 inverting input end to output as optoelectronic coupler.
Description
Technical field
This utility model relates to a kind of isolating device, belongs to electric automatization field.
Background technology
Photo-coupler (Photo-coupler), by its internal luminescence chip and the collocation of light sense chip, completes to turn the signal of telecommunication
Transfer the conversion of the signal of telecommunication for optical signal, optical signal again to, thus fit and can be used as a kind of circuit safety device.Pass through photo-coupler
Use, when can avoid the situations such as the signal of telecommunication generation surging of source terminal, instability so that the circuit because of receiving terminal is direct
It is electrically connected with this source terminal, and produces such as transistor and burn or circuit cannot the situation such as normal operation.
Traditional photoisolator is difficult to accomplish linearly, particularly under high pressure, because the increasing of the lighting time along with diode
Adding, the temperature of diode also can change therewith.Output and input voltage so can be caused to drift about than VTR.Thus nothing
Method realizes linear output.
Summary of the invention
This utility model purpose is to solve the output that the photoelectric cell of Traditional photovoltaic bonder causes along with variations in temperature
The most linear problem, it is provided that a kind of high-voltage linear photoelectrical coupler.
High-voltage linear photoelectrical coupler described in the utility model, including amplifier A1, amplifier A2, LED light emitting diode D1,
Phototriode PD1, phototriode PD2, resistance R1, resistance R2, resistance R3 and feedback capacity C1；Photosensitive three
The photosurface of pole pipe PD1 and the photosurface of phototriode PD2 accept the light that LED light emitting diode D1 sends simultaneously；
The in-phase input end of amplifier A1 accesses input voltage signal Vin；The inverting input of amplifier A1 is simultaneously connected with resistance
One end of R1, one end of feedback capacity C1 and the emitter stage of phototriode PD1；The outfan of amplifier A1 connects simultaneously
Connecing the other end and one end of resistance R2 of feedback capacity C1, the other end of resistance R2 connects LED light emitting diode D1
Anode, the minus earth of LED light emitting diode D1, the colelctor electrode of phototriode PD1 connects power Vcc 1；Electricity
The other end ground connection of resistance R1；
The in-phase input end of amplifier A2 is simultaneously connected with emitter stage and one end of resistance R3 of phototriode PD2；Resistance
The other end ground connection of R3；The colelctor electrode of phototriode PD2 connects power Vcc 2；The inverting input of amplifier A2 connects
The outfan of amplifier A2, and as the outfan of photoelectrical coupler.
Advantage of the present utility model: the design compensates circuit by design one, it is achieved that to light emitting diode along with temperature
The compensation of the VTR drift that change causes.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of high-voltage linear photoelectrical coupler described in the utility model.
Detailed description of the invention
Detailed description of the invention one: present embodiment is described below in conjunction with Fig. 1, high-voltage linear photoelectric coupling described in present embodiment
Device, including amplifier A1, amplifier A2, LED light emitting diode D1, phototriode PD1, phototriode PD2,
Resistance R1, resistance R2, resistance R3 and feedback capacity C1；The photosurface of phototriode PD1 and phototriode PD2
Photosurface accept the light that LED light emitting diode D1 sends simultaneously；
The in-phase input end of amplifier A1 accesses input voltage signal Vin；The inverting input of amplifier A1 is simultaneously connected with resistance
One end of R1, one end of feedback capacity C1 and the emitter stage of phototriode PD1；The outfan of amplifier A1 connects simultaneously
Connecing the other end and one end of resistance R2 of feedback capacity C1, the other end of resistance R2 connects LED light emitting diode D1
Anode, the minus earth of LED light emitting diode D1, the colelctor electrode of phototriode PD1 connects power Vcc 1；Electricity
The other end ground connection of resistance R1；
The in-phase input end of amplifier A2 is simultaneously connected with emitter stage and one end of resistance R3 of phototriode PD2；Resistance
The other end ground connection of R3；The colelctor electrode of phototriode PD2 connects power Vcc 2；The inverting input of amplifier A2 connects
The outfan of amplifier A2, and as the outfan of photoelectrical coupler.
Operation principle:
At the normal phase input end of A1 as the input of photoelectrical coupler, access a signal of telecommunication Vin, put through amplifier A1
Greatly, driving LED light emitting diode D1 that the signal of telecommunication is transformed into optical signal, phototriode PD1 detects optical signal also
Be transformed into the signal of telecommunication, wherein a road feed back to input by control LED light emitting diode D1 drive circuit with
Reach to compensate LED light emitting diode D1 and vary with temperature the VTR drift caused, make input signal keep stable；Additionally
One tunnel exports Vout after amplifier A2 processing and amplifying, owing to two phototriodes are controlled through overmatching and by same light source
Excite, its photoelectric current linearly so that the linear isolation transmission of circuit realiration input and outlet chamber analogue signal.
From schematic diagram disclosed in Fig. 1, signal is positive polarity input, and positive polarity exports.Amplifier A1 and phototriode
PD1 constitutes a photoelectric current feedback circuit, and the voltage VA of amplifier A1 inverting input is by along with the Vin of input signal
Changing and change, whole input circuit effectively forms a servo gain system.Output circuit part is actually an electricity
Pressure follower.In isolation circuit, the size of the primary amplifier input bias current of R1 regulation, C1 plays feedback effect, filters simultaneously
Except the burr signal in circuit, it is to avoid light source led is impacted by overvoltage.When input voltage vin is at 0V and A1
When output electric current IF is 0mA, there is a big open-loop gain value.Along with the increase of amplifier A1 output voltage, IF starts
There is current value and LED light emitting diode D1 is also into duty.Then, phototriode PD1, PD2 is by LED
The irradiation of the sent light of light emitting diode D1 and turn on, and produce electric current Ip1, Ip2.When Ip1 flows through R1, A1's
End of oppisite phase just produces voltage VA so that amplifier A1 enters negative feedback duty.When VA value is equal with Vin, IF
Value be not further added by, circuit is in more stable closed loop states.Through calculating output signal ratio linear with input signal
Example, and ratio is R2/R1.
Claims (1)
1. high-voltage linear photoelectrical coupler, it is characterised in that include amplifier A1, amplifier A2, LED light emitting diode D1,
Phototriode PD1, phototriode PD2, resistance R1, resistance R2, resistance R3 and feedback capacity C1；Photosensitive three
The photosurface of pole pipe PD1 and the photosurface of phototriode PD2 accept the light that LED light emitting diode D1 sends simultaneously；
The in-phase input end of amplifier A1 accesses input voltage signal Vin；The inverting input of amplifier A1 is simultaneously connected with resistance R1
One end, one end of feedback capacity C1 and the emitter stage of phototriode PD1；The outfan of amplifier A1 is simultaneously connected with feedback
The other end of electric capacity C1 and one end of resistance R2, the other end of resistance R2 connects the anode of LED light emitting diode D1,
The minus earth of LED light emitting diode D1, the colelctor electrode of phototriode PD1 connects power Vcc 1；Resistance R1's is another
One end ground connection；
The in-phase input end of amplifier A2 is simultaneously connected with emitter stage and one end of resistance R3 of phototriode PD2；Resistance R3
Other end ground connection；The colelctor electrode of phototriode PD2 connects power Vcc 2；The inverting input of amplifier A2 connects amplifier
The outfan of A2, and as the outfan of photoelectrical coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620435515.9U CN205584175U (en) | 2016-05-13 | 2016-05-13 | Linear optoelectronic coupler of high pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620435515.9U CN205584175U (en) | 2016-05-13 | 2016-05-13 | Linear optoelectronic coupler of high pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205584175U true CN205584175U (en) | 2016-09-14 |
Family
ID=56856285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620435515.9U Expired - Fee Related CN205584175U (en) | 2016-05-13 | 2016-05-13 | Linear optoelectronic coupler of high pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205584175U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109951185A (en) * | 2019-04-11 | 2019-06-28 | 王开 | High performance linear photoisolator |
-
2016
- 2016-05-13 CN CN201620435515.9U patent/CN205584175U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109951185A (en) * | 2019-04-11 | 2019-06-28 | 王开 | High performance linear photoisolator |
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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: 20160914 Termination date: 20170513 |