CN107241075A - Optocoupler amplifier circuit - Google Patents
Optocoupler amplifier circuit Download PDFInfo
- Publication number
- CN107241075A CN107241075A CN201710519706.2A CN201710519706A CN107241075A CN 107241075 A CN107241075 A CN 107241075A CN 201710519706 A CN201710519706 A CN 201710519706A CN 107241075 A CN107241075 A CN 107241075A
- Authority
- CN
- China
- Prior art keywords
- optocoupler
- amplifier
- amplifier circuit
- resistance
- circuit according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/42—Modifications of amplifiers to extend the bandwidth
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F17/00—Amplifiers using electroluminescent element or photocell
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a kind of optocoupler amplifier circuit, including preamplifier, amplifier, post amplifier, the first optocoupler OC1 and the second optocoupler OC2；Input signal Vi enters amplifier through preamplifier, output signal after amplifying through the amplifier output current signal after the first optocoupler OC1 and the second optocoupler OC2, current signal is again through through five resistance output voltage signals, finally entering output signal Vo after post amplifier amplification.The optocoupler amplifier circuit of the present invention, current transfer ratio is high, and linear transfer is good.
Description
Technical field
The present invention relates to a kind of optocoupler amplifier circuit, belong to field of photoelectric technology.
Background technology
Existing amplifying circuit is a lot, but respectively has advantage and disadvantage, often in order to carry out Current amplifier, and sacrifices linear biography
Defeated, signal passband etc..
The content of the invention
The technical problems to be solved by the invention be the defect for overcoming prior art there is provided a kind of optocoupler amplifier circuit,
Current transfer ratio is high, and linear transfer is good.
In order to solve the above technical problems, the present invention provides a kind of optocoupler amplifier circuit, it is characterized in that, including preposition amplification
Device, amplifier, post amplifier, the first optocoupler OC1 and the second optocoupler OC2；
Input signal Vi enters amplifier through preamplifier, and the output signal after amplifying through amplifier is through the first optocoupler OC1 and second
Output current signal after optocoupler OC2, current signal is again through through five resistance output voltage signals, finally entering post amplifier amplification
Output signal Vo afterwards.
The output signal of preamplifier is connected to the normal phase input end of amplifier, and the output end of amplifier connects the first light simultaneously
Coupling OC1 diode cathode, the first optocoupler OC1 diode anode is connected with the second optocoupler OC2 diode cathode, the second light
Coupling OC2 diode anode is connected to positive supply 12V through the 4th resistance, and the first optocoupler OC1 transistor emitter connects negative electricity
Source -12V, the first optocoupler OC1 transistor collector is connected to post amplifier through the 5th resistance；Second optocoupler OC2 three poles
The transistor collector that pipe emitter stage meets negative supply -12V, the second optocoupler OC2 is connected to the anti-phase input of amplifier through 3rd resistor
End, while being connected to positive supply 12V through second resistance.
Feedback capacity C is connected between the output end and inverting input of amplifier.
Post amplifier input is also connected to positive supply 12V through the 6th resistance simultaneously.
First optocoupler OC1 uses linear optical coupling pc817.
Second optocoupler OC2 uses linear optical coupling pc817.
The beneficial effect that the present invention is reached：
The optocoupler amplifier circuit of the present invention, current transfer ratio is high, and linear transfer is good.
Brief description of the drawings
Fig. 1 is the optocoupler amplifier circuit figure of the present invention.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
As shown in figure 1, the optocoupler amplifier circuit of the present invention includes preamplifier, amplifier, post amplifier, the first light
Coupling OC1 and the second optocoupler OC2.
Input signal Vi is inputted after preamplifier to the normal phase input end of amplifier, the output end and anti-phase input of amplifier
Feedback capacity C is connected between end, the output end of amplifier connects the first optocoupler OC1 diode cathode, the first optocoupler simultaneously
OC1 diode anode is connected with the second optocoupler OC2 diode cathode, and the second optocoupler OC2 diode anode is through resistance R4
The transistor emitter for being connected to positive supply 12V, the first optocoupler OC1 meets negative supply -12V, the first optocoupler OC1 triode collection
Electrode is connected to post amplifier through resistance R5, through post amplifier output signal Vo.Second optocoupler OC2 transistor emitter
The transistor collector for meeting negative supply -12V, the second optocoupler OC2 is connected to the inverting input of amplifier through resistance R3, while through
Resistance R2 is connected to positive supply 12V.
Post amplifier input is also connected to positive supply 12V through resistance R6 simultaneously.
First optocoupler OC1 and the second optocoupler OC2 can select linear optical coupling pc817.
Preamplifier, post amplifier can use existing base amplifier.
Output signal of the input signal after amplifier is amplified exports a larger current after two optocouplers, then through resistance
R5 output voltage signals, finally enter post amplifier output signal Vo.
Wish to get and preferably wait ratio/linear transfer, the ginseng of the nominal element of the equivalence of current transfer ratio and both sides of two optocouplers
Number needs to carry out linear matched, and each operating point parameter is equal, and antithesis component values are equal or wait ratio, make whole circuit work online
In property region.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these improve and deformed
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of optocoupler amplifier circuit, it is characterized in that, including preamplifier, amplifier, post amplifier, the first optocoupler OC1
With the second optocoupler OC2；
Input signal Vi enters amplifier through preamplifier, and the output signal after amplifying through amplifier is through the first optocoupler OC1 and second
Output current signal after optocoupler OC2, current signal is again through through five resistance output voltage signals, finally entering post amplifier amplification
Output signal Vo afterwards.
2. optocoupler amplifier circuit according to claim 1, it is characterized in that, the output signal of preamplifier is connected to fortune
The normal phase input end put, the output end of amplifier connects the first optocoupler OC1 diode cathode, the first optocoupler OC1 two poles simultaneously
Tube anode is connected with the second optocoupler OC2 diode cathode, and the second optocoupler OC2 diode anode is connected to just through the 4th resistance
Power supply 12V, the first optocoupler OC1 transistor emitter connect negative supply -12V, the first optocoupler OC1 transistor collector through
Five resistance are connected to post amplifier；Second optocoupler OC2 transistor emitter meets negative supply -12V, the three of the second optocoupler OC2
Pole pipe colelctor electrode is connected to the inverting input of amplifier through 3rd resistor, while being connected to positive supply 12V through second resistance.
3. optocoupler amplifier circuit according to claim 1, it is characterized in that, between the output end and inverting input of amplifier
It is connected with feedback capacity C.
4. optocoupler amplifier circuit according to claim 1, it is characterized in that, post amplifier input is also simultaneously through the 6th
Resistance is connected to positive supply 12V.
5. optocoupler amplifier circuit according to claim 1, it is characterized in that, the first optocoupler OC1 uses linear optical coupling
pc817。
6. optocoupler amplifier circuit according to claim 1, it is characterized in that, the second optocoupler OC2 uses linear optical coupling
pc817。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710519706.2A CN107241075A (en) | 2017-06-30 | 2017-06-30 | Optocoupler amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710519706.2A CN107241075A (en) | 2017-06-30 | 2017-06-30 | Optocoupler amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107241075A true CN107241075A (en) | 2017-10-10 |
Family
ID=59990803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710519706.2A Withdrawn CN107241075A (en) | 2017-06-30 | 2017-06-30 | Optocoupler amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107241075A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994874A (en) * | 2017-11-23 | 2018-05-04 | 西安电子科技大学 | IC power consumption compensation circuit |
-
2017
- 2017-06-30 CN CN201710519706.2A patent/CN107241075A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994874A (en) * | 2017-11-23 | 2018-05-04 | 西安电子科技大学 | IC power consumption compensation circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171010 |