CN205864388U - A kind of Novel DC voltage isolation circuit - Google Patents
A kind of Novel DC voltage isolation circuit Download PDFInfo
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- CN205864388U CN205864388U CN201620863013.6U CN201620863013U CN205864388U CN 205864388 U CN205864388 U CN 205864388U CN 201620863013 U CN201620863013 U CN 201620863013U CN 205864388 U CN205864388 U CN 205864388U
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- optocoupler
- resistance
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- pin
- voltage
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Abstract
The utility model discloses a kind of Novel DC voltage isolation circuit, including: operational amplifier, the first optocoupler, the second optocoupler, the first resistance, the second resistance, the 3rd resistance, electric capacity, the 5th resistance and pull-up resistor.A kind of DC voltage isolation circuit of the present utility model, utilize the Phototube Coupling principle of optocoupler, realize input, the electrical isolation of output voltage, output voltage values can be made linearly to follow input voltage value simultaneously, the interference problem that direct current signal to seal in during Long line transmission can be solved.
Description
Technical field
This utility model relates to electronic circuit technology field, particularly relates to a kind of DC voltage isolation circuit.
Background technology
In medical electronic linear accelerator system, for preventing ionizing radiation, control station separates in two rooms with accelerator
Between, the control signal that control station sends need to get to accelerator through the longest one section of cable.When the magnetic control in accelerator system
During the vacuum device high voltage arcs such as pipe and electron gun, the crosstalk that meeting output is the strongest in communication cable, even can damage time serious
Support device in system, therefore needs to design a kind of isolation circuit, the signal of communication between control station and accelerator is carried out every
From, the interference produced when reducing sparking, it is ensured that system worked well.
Utility model content
The technical problem existed based on background technology, the utility model proposes a kind of Novel DC voltage isolation circuit.
A kind of Novel DC voltage isolation circuit that the utility model proposes, including: operational amplifier, the first optocoupler,
Two optocouplers, the first resistance, the second resistance, the 3rd resistance, electric capacity, the 5th resistance and pull-up resistor；
The in-phase end of operational amplifier and end of oppisite phase connect first resistance the first end and second resistance the first end respectively；First
One in resistance the second end and second resistance the second end as Input voltage terminal, another as feedback incoming end；Computing is put
The in-phase end of big device is also by the 3rd resistance eutral grounding, and its end of oppisite phase connects its outfan by electric capacity；
First optocoupler input the first pin is LED positive pole, and its input second pin is LED negative pole；Second optocoupler is defeated
Entering end the first pin is LED positive pole, and its input second pin is LED negative pole；
Operational amplifier output terminal connects first optocoupler input the first pin, and first optocoupler input the second pin connects
Second optocoupler input the first pin, second optocoupler input the second pin ground connection；
One in first optocoupler outfan the first pin and the second pin as the first optocoupler feeder ear, another conduct
Feedback output end；First optocoupler feeder ear connects the first supply voltage, and feedback output end connects feedback incoming end and by the 5th
Resistance eutral grounding；
One in second optocoupler outfan the first pin and the second pin as the second optocoupler feeder ear, another conduct
Output voltage terminal；Second optocoupler feeder ear accesses second source voltage, and output voltage terminal draws output voltage and by pull-up electricity
Resistance ground connection.
Preferably, when first resistance the second end is as Input voltage terminal, then the first optocoupler feeder ear and feedback output end divide
It it is not the collector and emitter of the first optocoupler illuminated triode；When second resistance the second end is as Input voltage terminal, then first
Optocoupler feeder ear and feedback output end are respectively the emitter and collector of the first optocoupler illuminated triode.
Preferably, when output voltage is just, then the second optocoupler feeder ear and output voltage terminal are respectively the second optocoupler light
Transistor collector and emitter stage；When output voltage is negative, then the second optocoupler feeder ear and output voltage terminal are respectively the second light
Coupling illuminated triode emitter and collector.
Preferably, pull-up resistor uses swept resistance.
Preferably, when output voltage terminal is the second optocoupler illuminated triode emitter stage, pull-up resistor the first end and sliding end
It is all connected with output voltage terminal, pull-up resistor the second end ground connection；When output voltage terminal is the second optocoupler illuminated triode colelctor electrode, on
Pull-up resistor the first end connects output voltage terminal, pull-up resistor sliding end and the second end ground connection.
Preferably, operational amplifier output terminal connects the first optocoupler by the 4th resistance.
Preferably, operational amplifier running voltage is+15V.
In this utility model, operational amplifier, the first resistance, the second resistance, the 3rd resistance and capacitor composition difference are put
Big circuit, when Input voltage terminal accesses input voltage, and the voltage signal of operational amplifier output terminal output drives the first optocoupler work
Making to produce photoelectric current, this electric current formed feedback voltage before the 5th resistance and accesses the input of operational amplifier through the second resistance
End.Due to the differential amplification effect of operational amplifier, feedback voltage level now is equal to input voltage value.First optocoupler and second
Optocoupler is identical with the duty both ensureing by internal LED strip connection.So, when the first supply voltage and second source electricity
When identical and the 5th resistance and pull-up resistor the resistance value of magnitude of voltage of pressure is equal, the output voltage of output voltage terminal is equal to input
The input voltage of voltage end, it is achieved the electrical isolation of the two and voltage linear follow function.
A kind of DC voltage isolation circuit of the present utility model, utilizes the Phototube Coupling principle of optocoupler, it is achieved input, export
The electrical isolation of voltage, can make output voltage values linearly follow input voltage value simultaneously, and can solve direct current signal to pass at long line
The interference problem sealed in during defeated.
This utility model achieves Signals & Systems isolation and signal voltage linearly follows dual-use function, beneficially electro-medical
Protection in control signal transmitting procedure application in sub-linear accelerator system.
Accompanying drawing explanation
Fig. 1 is a kind of Novel DC voltage isolation circuit schematic diagram that embodiment 1 proposes；
Fig. 2 is a kind of Novel DC voltage isolation circuit schematic diagram that embodiment 2 proposes；
Fig. 3 is a kind of Novel DC voltage isolation circuit schematic diagram that embodiment 3 proposes；
Fig. 4 is a kind of Novel DC voltage isolation circuit schematic diagram that embodiment 4 proposes.
Detailed description of the invention
Referring to figs. 1 through Fig. 4, a kind of Novel DC voltage isolation circuit that the utility model proposes, including: operational amplifier
U1, the first optocoupler U2, the second optocoupler U3, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, electric capacity C1,
5th resistance R5 and pull-up resistor RW1.
The in-phase end of operational amplifier U1 and end of oppisite phase connect first resistance R1 the first end and the second resistance R2 first respectively
End.One in first resistance R1 the second end and second resistance R2 the second end as Input voltage terminal Vin, another is as instead
Feedback incoming end.The in-phase end of operational amplifier U1 is also by the 3rd resistance R3 ground connection, and it is defeated that its end of oppisite phase connects it by electric capacity C1
Go out end.
First optocoupler U2 input the first pin is LED positive pole, and its input second pin is LED negative pole.Second optocoupler
U3 input the first pin is LED positive pole, and its input second pin is LED negative pole.
Operational amplifier U1 outfan connects first optocoupler U2 input the first pin, the first optocoupler by the 4th resistance R4
U2 input the second pin connects second optocoupler U3 input the first pin, second optocoupler U3 input the second pin ground connection.As
This, the first optocoupler U2 and the second optocoupler U3 is identical with the duty both ensureing by internal LED strip connection.4th resistance R4
Setting the first optocoupler U2 can be carried out current-limiting protection.
One in first optocoupler U2 outfan the first pin and the second pin as the first optocoupler feeder ear, another make
For feedback output end.First optocoupler feeder ear connects the first supply voltage VCC1, and feedback output end connects feedback incoming end and leads to
Cross the 5th resistance R5 ground connection.
Operational amplifier U1, the first resistance R1, the second resistance R2, the 3rd resistance R3 and capacitor C1 composition differential amplification electricity
Road, when Input voltage terminal Vin accesses input voltage, and the voltage signal of operational amplifier U1 outfan output drives the first optocoupler U2
Internal LED, is allowed to send the light of certain wavelength, is received by phototriode and produce photoelectric current, and this electric current is at the 5th resistance
Form feedback voltage before R5 and access the input of operational amplifier U1 through the second resistance R2.Owing to the difference of operational amplifier is put
Big effect, feedback voltage level now is equal to input voltage value.
One in second optocoupler U3 outfan the first pin and the second pin as the second optocoupler feeder ear, another make
For output voltage terminal Vout.Second optocoupler feeder ear accesses second source voltage VCC2, output voltage terminal Vout and draws output electricity
Press and pass through pull-up resistor ground connection.
Light emitting diode within first optocoupler U2 and the second optocoupler U3 is to be connected in series to, so the duty phase of the two
With.So, identical with the magnitude of voltage of second source voltage VCC2 as the first supply voltage VCC1 and the 5th resistance R5 and pull-up electricity
When the resistance value of resistance RW1 is equal, the output voltage of the output voltage terminal Vout input voltage equal to Input voltage terminal Vin, it is achieved
The electrical isolation of the two and voltage linear follow function.
In present embodiment, pull-up resistor RW1 uses swept resistance, so, defeated by fine setting pull-up resistor RW1 adjustable
The linearity going out voltage overcomes the parameter of device to there is the adverse effect of a little error.
In present embodiment, operational amplifier U1 running voltage is+15V.
Below in conjunction with several specific embodiments, circuit of the present invention is described in detail.
Embodiment 1
With reference to scheming, 1, when first resistance R1 the second end is as Input voltage terminal Vin, i.e. Input voltage terminal Vin will input electricity
Crimping into operational amplifier U1 in-phase end, the first optocoupler feeder ear and feedback output end are respectively the first optocoupler illuminated triode
Collector and emitter.Now, if the second optocoupler feeder ear and output voltage terminal Vout are respectively the second optocoupler light three pole
Pipe collector and emitter stage, then the output voltage of output voltage terminal Vout and input voltage homophase are just.Now, pull-up resistor
RW1 the first end and sliding end are all connected with output voltage terminal Vout, pull-up resistor RW1 the second end ground connection.
Embodiment 2
With reference to Fig. 2, when first resistance R1 the second end is as Input voltage terminal Vin, i.e. Input voltage terminal Vin is by input voltage
Access operational amplifier U1 in-phase end, then the first optocoupler feeder ear and feedback output end are respectively the first optocoupler illuminated triode
Collector and emitter.Now, if the second optocoupler feeder ear and output voltage terminal Vout are respectively the second optocoupler light three pole
Pipe emitter and collector, then output voltage is anti-phase with input voltage, is negative.Now, pull-up resistor RW1 the first end connects output
Voltage end Vout, pull-up resistor RW1 sliding end and the second end ground connection.
Embodiment 3
With reference to Fig. 3, when second resistance R2 the second end is as Input voltage terminal Vin, i.e. Input voltage terminal Vin is by input voltage
Access operational amplifier U1 end of oppisite phase, then the first optocoupler feeder ear and feedback output end are respectively the first optocoupler illuminated triode
Emitter and collector.Now, if the second optocoupler feeder ear and output voltage terminal Vout are respectively the second optocoupler light three pole
Pipe emitter and collector, then output voltage and input voltage homophase, be negative.Pull-up resistor RW1 the first end connects output voltage
End Vout, pull-up resistor RW1 sliding end and the second end ground connection.
Embodiment 4
With reference to Fig. 4, when second resistance R2 the second end is as Input voltage terminal Vin, i.e. Input voltage terminal Vin is by input voltage
Access operational amplifier U1 end of oppisite phase, then the first optocoupler feeder ear and feedback output end are respectively the first optocoupler illuminated triode
Emitter and collector.Now, if the second optocoupler feeder ear and output voltage terminal Vout are respectively the second optocoupler light three pole
Pipe collector and emitter stage, then output voltage is just anti-phase with input voltage.Pull-up resistor RW1 the first end and sliding end are all connected with
Output voltage terminal Vout, pull-up resistor RW1 the second end ground connection.
The above, only this utility model preferably detailed description of the invention, but protection domain of the present utility model is not
Being confined to this, any those familiar with the art is in the technical scope that this utility model discloses, according to this practicality
Novel technical scheme and utility model thereof conceive equivalent or change in addition, all should contain at protection model of the present utility model
Within enclosing.
Claims (7)
1. a Novel DC voltage isolation circuit, it is characterised in that including: operational amplifier (U1), the first optocoupler (U2),
Two optocouplers (U3), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), electric capacity (C1), the 5th resistance (R5) and pull-up
Resistance (RW1)；
The in-phase end of operational amplifier (U1) and end of oppisite phase connect the first resistance (R1) the first end and the second resistance (R2) respectively
One end；One in first resistance (R1) the second end and the second resistance (R2) the second end as Input voltage terminal (Vin), another
As feedback incoming end；The in-phase end of operational amplifier (U1) passes through electric capacity also by the 3rd resistance (R3) ground connection, its end of oppisite phase
(C1) its outfan is connected；
First optocoupler (U2) input the first pin is LED positive pole, and its input second pin is LED negative pole；Second optocoupler
(U3) input the first pin is LED positive pole, and its input second pin is LED negative pole；
Operational amplifier (U1) outfan connects the first optocoupler (U2) input the first pin, the first optocoupler (U2) input second
Pin connects the second optocoupler (U3) input the first pin, the second optocoupler (U3) input the second pin ground connection；
In first optocoupler (U2) outfan the first pin and the second pin one is as the first optocoupler feeder ear, another conduct
Feedback output end；First optocoupler feeder ear connects the first supply voltage (VCC1), and feedback output end connects feedback incoming end and leads to
Cross the 5th resistance (R5) ground connection；
In second optocoupler (U3) outfan the first pin and the second pin one is as the second optocoupler feeder ear, another conduct
Output voltage terminal (Vout)；Second optocoupler feeder ear accesses second source voltage (VCC2), and output voltage terminal (Vout) is drawn defeated
Go out voltage and by pull-up resistor ground connection.
2. Novel DC voltage isolation circuit as claimed in claim 1, it is characterised in that when the first resistance (R1) the second end is made
For Input voltage terminal (Vin), then the first optocoupler feeder ear and feedback output end are respectively the current collection of the first optocoupler illuminated triode
Pole and emitter stage；When the second resistance (R2) the second end is as Input voltage terminal (Vin), then the first optocoupler feeder ear and feedback output
End is respectively the emitter and collector of the first optocoupler illuminated triode.
3. Novel DC voltage isolation circuit as claimed in claim 1, it is characterised in that when output voltage is just, then second
Optocoupler feeder ear and output voltage terminal (Vout) are respectively the second optocoupler illuminated triode collector and emitter；Work as output voltage
Be negative, then the second optocoupler feeder ear and output voltage terminal (Vout) are respectively the second optocoupler illuminated triode emitter stage and current collection
Pole.
4. Novel DC voltage isolation circuit as claimed in claim 3, it is characterised in that pull-up resistor (RW1) uses and slides
Resistance.
5. Novel DC voltage isolation circuit as claimed in claim 4, it is characterised in that when output voltage terminal (Vout) is the
Two optocoupler illuminated triode emitter stages, pull-up resistor (RW1) the first end and sliding end are all connected with output voltage terminal (Vout), pull up
Resistance (RW1) the second end ground connection；When output voltage terminal (Vout) is the second optocoupler illuminated triode colelctor electrode, pull-up resistor
(RW1) the first end connects output voltage terminal (Vout), pull-up resistor (RW1) sliding end and the second end ground connection.
6. Novel DC voltage isolation circuit as claimed in claim 1, it is characterised in that operational amplifier (U1) outfan leads to
Cross the 4th resistance (R4) and connect the first optocoupler (U2).
7. Novel DC voltage isolation circuit as claimed in claim 1, it is characterised in that operational amplifier (U1) running voltage
For+15V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620863013.6U CN205864388U (en) | 2016-08-10 | 2016-08-10 | A kind of Novel DC voltage isolation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620863013.6U CN205864388U (en) | 2016-08-10 | 2016-08-10 | A kind of Novel DC voltage isolation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205864388U true CN205864388U (en) | 2017-01-04 |
Family
ID=57658283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620863013.6U Expired - Fee Related CN205864388U (en) | 2016-08-10 | 2016-08-10 | A kind of Novel DC voltage isolation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205864388U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656121A (en) * | 2017-11-09 | 2018-02-02 | 珠海泰坦科技股份有限公司 | A kind of low cost DC voltage isolation picking circuit |
| CN108045256A (en) * | 2017-12-26 | 2018-05-18 | 深圳深宝电器仪表有限公司 | A kind of charging system for electric automobile and charging pile |
| CN112653115A (en) * | 2020-12-18 | 2021-04-13 | 同方电子科技有限公司 | Multi-module parallel input circuit for preventing reverse connection, overvoltage and undervoltage protection and isolating switch |
-
2016
- 2016-08-10 CN CN201620863013.6U patent/CN205864388U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656121A (en) * | 2017-11-09 | 2018-02-02 | 珠海泰坦科技股份有限公司 | A kind of low cost DC voltage isolation picking circuit |
| CN108045256A (en) * | 2017-12-26 | 2018-05-18 | 深圳深宝电器仪表有限公司 | A kind of charging system for electric automobile and charging pile |
| CN108045256B (en) * | 2017-12-26 | 2023-11-03 | 深圳深宝电器仪表有限公司 | Electric automobile charging system and fill electric pile |
| CN112653115A (en) * | 2020-12-18 | 2021-04-13 | 同方电子科技有限公司 | Multi-module parallel input circuit for preventing reverse connection, overvoltage and undervoltage protection and isolating switch |
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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 |
Granted publication date: 20170104 Termination date: 20200810 |
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| CF01 | Termination of patent right due to non-payment of annual fee |