CN106656063A - Method for achieving linear isolated transmission of bipolar analog signals - Google Patents
Method for achieving linear isolated transmission of bipolar analog signals Download PDFInfo
- Publication number
- CN106656063A CN106656063A CN201710021116.7A CN201710021116A CN106656063A CN 106656063 A CN106656063 A CN 106656063A CN 201710021116 A CN201710021116 A CN 201710021116A CN 106656063 A CN106656063 A CN 106656063A
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- China
- Prior art keywords
- signal
- output
- circuit
- drive
- optical coupling
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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
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
-
- 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
- H03F1/38—Positive-feedback circuit arrangements without negative feedback
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Optical Communication System (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a method for achieving linear isolated transmission of bipolar analog signals. According to the method, by arranging corresponding current biasing circuits in a driving circuit and an output amplifying circuit respectively, the driving circuit and the output amplifying circuit can respond to positive signals and negative signals respectively. The method for achieving linear isolated transmission of bipolar analog signals has the advantages that by adopting the method, a device can respond to both negative signals and positive signals, and linear isolated transmission of bipolar analog signals can be achieved without considering the synchronism problem.
Description
Technical field
The present invention relates to a kind of bipolar analog signal transmission technology, more particularly to one kind realizes bipolar analog holding wire
The method of sexual isolation transmission.
Background technology
Existing Phototube Coupling linear amplifier is only used for the isolation transmission of unipolarity analog signal, for bipolarity mould
Intend the isolation linear transfer of signal, it is general to adopt the side of the Phototube Coupling linear amplifier parallel combination of two opposed polarities
Case, the problem that this scheme is present is：In order to ensure that signal is alternately changed by two Phototube Coupling linear amplifiers during zero point
Synchronism, need specially to arrange peripheral circuit for adjusting synchronism for it, cause system architecture complicated, volume is larger,
Stability is relatively low.
The content of the invention
For the problem in background technology, the present invention is proposed and a kind of realizes bipolar analog linearly isolation transmission
Method, involved hardware includes：Drive circuit, linear optical coupling, output amplifier；The drive circuit can be in input signal
Control under to linear optical coupling provide drive signal；The linear optical coupling can carry out electric opto-electronic conversion to drive signal and will change
Signal output afterwards is to output amplifier；The output amplifier can carry out Linear Amplifer to the signal of linear optical coupling output
And outwards export；
Its innovation is：The bipolar analog signal includes positive signal and negative signal；Input is provided with the drive circuit
Current biasing circuit, the input current biasing circuit is used to provide bias current for drive circuit, enables drive circuit to exist
The electric current of output drive signal under the control of negative signal, the drive signal of correspondence positive signal and the drive signal of correspondence negative signal is big
Little difference；Output current biasing circuit is provided with the output amplifier, the output current biasing circuit is used to be defeated
Go out amplifying circuit and bias current is provided, enable output amplifier to export two kinds of outputs for corresponding to positive signal and negative signal respectively
Signal.
The present invention principle be：Understood based on existing theory, under different driving amperage conditions, the output electricity of optocoupler
Stream is different, using the present invention after, due to being provided with input current biasing circuit in drive circuit, this allows for drive circuit
The positive signal being input into can be responded, also the negative signal being input into can be responded, and input signal is respectively positive signal
During with negative signal, drive circuit can output current drive signal of different sizes, then, size of current it is different driving letter
Under number driving, linear optical coupling also can output current signal of different sizes, two kinds in order to coordinate drive circuit export, and output is put
Output current biasing circuit is also provided with big circuit, this allows for output amplifier and can also export to correspond respectively to just believe
Number and negative signal two kinds of output signals, by aforementioned manner, it is possible to realize under conditions of synchronous sex chromosome mosaicism is not considered double
The linear isolation transmission of polarity analog signal.
Hardware involved in the present invention, it is independent from the point of view of, the function that they are realized is existing conventional func, but
It is in the close examination present invention, it should be taken into account that the state of the art of analog signal Phototube Coupling transmission field, in the art, to use
The function of response negative signal is not had in the drive circuit for driving linear optical coupling, and those skilled in the art are due to being limited to
Conventional thinking, research emphasis are conceived to " synchronism " problem for solving parallel arrangement in background technology mostly；And adopt the present invention
Afterwards, not only not there are problems that " synchronism ", so that hardware is greatly simplified, device volume is reduced.
Preferably, temperature drift compensating circuit is provided with the drive circuit, is drawn from the output signal of linear optical coupling
Go out all the way signal as feedback signal transmission to temperature drift compensating circuit；The temperature drift compensating circuit can be according to feedback letter
Number the output signal of drive circuit is adjusted, makes linear optical coupling steady operation.Temperature drift compensating circuit is in this area
Very common technology, after it is combined with the present invention, can further improve the performance of the present invention.
The method have the benefit that：Propose a kind of side for realizing the isolation transmission of bipolar analog linearly
Method, after the method so that device can both respond negative signal and can also respond positive signal, can not consider that synchronism is asked
The linear isolation transmission of bipolar analog signal is realized under conditions of topic.
Description of the drawings
The electronic schematic diagram of Fig. 1, the present invention；
Fig. 2, a kind of exemplary circuit for realizing the present invention program；
The corresponding title of each mark is respectively in figure：Drive circuit 1, linear optical coupling 2, output amplifier 3, input current
Biasing circuit 4, output current biasing circuit 5.
Specific embodiment
A kind of method for realizing the isolation transmission of bipolar analog linearly, involved hardware includes：Drive circuit 1,
Linear optical coupling 2, output amplifier 3；The drive circuit 1 can provide driving under the control of input signal to linear optical coupling 2
Signal；The linear optical coupling 2 can carry out electric opto-electronic conversion to drive signal and the signal output after conversion is amplified into electricity to output
Road 3；The output amplifier 3 can carry out Linear Amplifer and outwards export to the signal of the output of linear optical coupling 2；
Its innovation is：The bipolar analog signal includes positive signal and negative signal；Input is provided with the drive circuit 1
Current biasing circuit 4, the input current biasing circuit 4 is used to provide bias current for drive circuit 1, enables drive circuit 1
The electricity of enough output drive signals under the control of negative signal, the drive signal of correspondence positive signal and the drive signal of correspondence negative signal
Stream is of different sizes；Output current biasing circuit 5 is provided with the output amplifier 3, the output current biasing circuit 5 is used
In bias current is provided for output amplifier 3, output amplifier 3 is exported and correspond to respectively positive signal and negative signal
Two kinds of output signals.
Further, temperature drift compensating circuit is provided with the drive circuit 1, from the output signal of linear optical coupling 2
It is middle extraction all the way signal as feedback signal transmission to temperature drift compensating circuit；The temperature drift compensating circuit can be according to anti-
Feedback signal is adjusted to the output signal of drive circuit 1, makes the steady operation of linear optical coupling 2.
Claims (2)
1. a kind of to realize the method that the isolation of bipolar analog linearly is transmitted, involved hardware includes：Drive circuit（1）、
Linear optical coupling（2）, output amplifier（3）；The drive circuit（1）Can be under the control of input signal to linear optical coupling（2）
Drive signal is provided；The linear optical coupling（2）Drive signal can be carried out electric opto-electronic conversion and by the signal output after conversion extremely
Output amplifier（3）；The output amplifier（3）Can be to linear optical coupling（2）The signal of output carry out Linear Amplifer and to
Outer output；
It is characterized in that：The bipolar analog signal includes positive signal and negative signal；The drive circuit（1）Inside it is provided with defeated
Enter current biasing circuit（4）, the input current biasing circuit（4）For for drive circuit（1）Bias current is provided, driving is made
Circuit（1）Being capable of output drive signal, the drive signal of correspondence positive signal and the drive of correspondence negative signal under the control of negative signal
The size of current of dynamic signal is different；The output amplifier（3）Inside it is provided with output current biasing circuit（5）, the output
Current biasing circuit（5）For for output amplifier（3）Bias current is provided, output amplifier is made（3）Can export point
Not Dui Ying positive signal and negative signal two kinds of output signals.
It is 2. according to claim 1 to realize the method that the isolation of bipolar analog linearly is transmitted, it is characterised in that：It is described
Drive circuit（1）Temperature drift compensating circuit is inside provided with, from linear optical coupling（2）Output signal in draw signal conduct all the way
Feedback signal transmission is to temperature drift compensating circuit；The temperature drift compensating circuit can be according to feedback signal to drive circuit
（1）Output signal be adjusted, make linear optical coupling（2）Steady operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710021116.7A CN106656063A (en) | 2017-01-12 | 2017-01-12 | Method for achieving linear isolated transmission of bipolar analog signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710021116.7A CN106656063A (en) | 2017-01-12 | 2017-01-12 | Method for achieving linear isolated transmission of bipolar analog signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106656063A true CN106656063A (en) | 2017-05-10 |
Family
ID=58844147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710021116.7A Pending CN106656063A (en) | 2017-01-12 | 2017-01-12 | Method for achieving linear isolated transmission of bipolar analog signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106656063A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201072859Y (en) * | 2007-07-03 | 2008-06-11 | 河南辉煌科技股份有限公司 | Signal isolating and amplifying circuit module |
| CN201341115Y (en) * | 2008-11-05 | 2009-11-04 | 中国北车股份有限公司大连电力牵引研发中心 | Isolation amplification circuit of alternating-current analog electrical signal based on linear optical coupler |
| CN103884895A (en) * | 2012-12-20 | 2014-06-25 | 北京普源精电科技有限公司 | Multipath linear isolation circuit and oscilloscope thereof |
| CN103884894A (en) * | 2012-12-20 | 2014-06-25 | 北京普源精电科技有限公司 | Improved shunting linear isolation circuit and oscilloscope thereof |
-
2017
- 2017-01-12 CN CN201710021116.7A patent/CN106656063A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201072859Y (en) * | 2007-07-03 | 2008-06-11 | 河南辉煌科技股份有限公司 | Signal isolating and amplifying circuit module |
| CN201341115Y (en) * | 2008-11-05 | 2009-11-04 | 中国北车股份有限公司大连电力牵引研发中心 | Isolation amplification circuit of alternating-current analog electrical signal based on linear optical coupler |
| CN103884895A (en) * | 2012-12-20 | 2014-06-25 | 北京普源精电科技有限公司 | Multipath linear isolation circuit and oscilloscope thereof |
| CN103884894A (en) * | 2012-12-20 | 2014-06-25 | 北京普源精电科技有限公司 | Improved shunting linear isolation circuit and oscilloscope thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170510 |
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| RJ01 | Rejection of invention patent application after publication |