CN103178748A - Photoelectric conversion circuit - Google Patents
Photoelectric conversion circuit Download PDFInfo
- Publication number
- CN103178748A CN103178748A CN2013100471310A CN201310047131A CN103178748A CN 103178748 A CN103178748 A CN 103178748A CN 2013100471310 A CN2013100471310 A CN 2013100471310A CN 201310047131 A CN201310047131 A CN 201310047131A CN 103178748 A CN103178748 A CN 103178748A
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- trans
- impedance amplifier
- transimpedance amplifier
- resistance
- circuit
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Abstract
The invention discloses a photoelectric conversion circuit which comprises a first transimpedance amplifier. A positive end of the first transimpedance amplifier is connected with a positive end of a second transimpedance amplifier and is also grounded. A negative end of the first transimpedance amplifier is respectively connected with an anode of a photodiode and one end of a first resistor. A cathode of the photodiode is respectively connected with a negative end of the second transimpedance amplifier and one end of a second resistor. The other end of the first resistor is connected with an output end of the first transimpedance amplifier. The other end of the second resistor is connected with an output end of the second transimpedance amplifier transimpedance amplifier. The first transimpedance amplifier and the second transimpedance amplifier output photoelectric conversion differential voltages V1 and V2. The photoelectric conversion circuit uses the power voltage range effectively, and speed and interference resistance of the circuit are increased. After the first resistor and the second resistor are parallelly connected with a first capacitor and a second capacitor, filtering performance of the circuit is also increased.
Description
Technical field
The invention belongs to field of photoelectric technology, particularly a kind of photoelectric switching circuit.
Background technology
Traditional photoelectric switching circuit is also that the photodiode interface circuit adopts trans-impedance amplifier (or being called the curtage change-over circuit), has simple in structurely, and the advantage of good linearity has been widely used in various photoelectric measurement instruments and system.
The inventor finds to exist at least in prior art following shortcoming and defect in realizing process of the present invention:
Reduce power consumption and reduce interior circuit volume by reducing supply voltage in prior art, traditional trans-impedance amplifier is difficult to effectively utilize the voltage magnitude of power supply; And also need further raising aspect interference free performance.
Summary of the invention
The invention provides a kind of photoelectric switching circuit, this circuit has improved circuit speed and interference free performance, has effectively utilized the scope of low supply voltage, sees for details hereinafter to describe:
A kind of photoelectric switching circuit comprises: the first trans-impedance amplifier, and the positive ends of described the first trans-impedance amplifier is connected with the positive ends of the second trans-impedance amplifier, and while ground connection,
The negative polarity end of described the first trans-impedance amplifier is connected with the anode of photodiode and an end of the first resistance respectively; The negative electrode of described photodiode is connected with the negative polarity end of described the second trans-impedance amplifier and an end of the second resistance respectively; The output of described first trans-impedance amplifier of another termination of described the first resistance; The output of described second trans-impedance amplifier of another termination of described the second resistance; The differential voltage V of described the first trans-impedance amplifier and described the second trans-impedance amplifier output photoelectric conversion
1-V
2
Described circuit also comprises: the first electric capacity and the second electric capacity, and described the first Capacitance parallel connection connects described the first resistance, and described the second Capacitance parallel connection connects described the second resistance.
The beneficial effect of technical scheme provided by the invention is: by the first trans-impedance amplifier and the second trans-impedance amplifier are connected in parallel, make the differential voltage V of its output photoelectric conversion
1-V
2, circuit provided by the invention has effectively utilized the supply voltage scope, has improved speed and the interference free performance of circuit; When the first resistance and the second resistance are connected in parallel to respectively the first electric capacity and the second electric capacity, also improved the filtering performance of circuit.
Description of drawings
Fig. 1 is the circuit theory diagrams of a kind of photoelectric switching circuit provided by the invention;
Fig. 2 is another circuit theory diagrams of a kind of photoelectric switching circuit provided by the invention.
In accompanying drawing, the list of parts of each label representative is as follows:
A
1: the first trans-impedance amplifier; A
2: the second trans-impedance amplifier;
R
1: the first resistance; R
2: the second resistance;
D: photodiode; C
1: the first electric capacity;
C
2: the second electric capacity.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
In order to improve circuit speed and interference free performance, effectively utilize the scope of low supply voltage, the embodiment of the present invention has proposed a kind of photoelectric switching circuit, referring to Fig. 1, comprising: the first trans-impedance amplifier A
1, the first trans-impedance amplifier A
1Positive ends and the second trans-impedance amplifier A
2Positive ends be connected, and ground connection simultaneously;
The first trans-impedance amplifier A
1The negative polarity end respectively with anode and the first resistance R of photodiode D
1An end be connected; The negative electrode of photodiode D respectively with the second trans-impedance amplifier A
2Negative polarity end and the second resistance R
2An end be connected; The first resistance R
1Another termination the first trans-impedance amplifier A
1Output; The second resistance R
2Another termination the second trans-impedance amplifier A
2Output; The first trans-impedance amplifier A
1With the second trans-impedance amplifier A
2The differential voltage V of output photoelectric conversion
1-V
2
Further, in order to increase the filtering performance of circuit, referring to Fig. 2, this circuit also comprises: the first capacitor C
1With the second capacitor C
2,
The first capacitor C
1The first resistance R is connected in parallel
1, the second capacitor C
2The second resistance R is connected in parallel
2
During specific implementation, the embodiment of the present invention does not limit the model of said elements, all can as long as can complete the components and parts of above-mentioned functions.
In sum, the circuit that the embodiment of the present invention provides has effectively utilized the supply voltage scope, has improved speed and the interference free performance of circuit; When the first resistance and the second resistance are connected in parallel to respectively the first electric capacity and the second electric capacity, also improved the filtering performance of circuit.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the invention described above embodiment sequence number does not represent the quality of embodiment just to description.
The above is only preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (2)
1. a photoelectric switching circuit, comprising: the first trans-impedance amplifier (A
1), it is characterized in that described the first trans-impedance amplifier (A
1) positive ends and the second trans-impedance amplifier (A
2) positive ends be connected, and ground connection simultaneously,
Described the first trans-impedance amplifier (A
1) the negative polarity end respectively with anode and the first resistance (R of photodiode (D)
1) an end be connected; The negative electrode of described photodiode (D) respectively with described the second trans-impedance amplifier (A
2) negative polarity end and the second resistance (R
2) an end be connected; Described the first resistance (R
1) described the first trans-impedance amplifier (A of another termination
1) output; Described the second resistance (R
2) described the second trans-impedance amplifier (A of another termination
2) output; Described the first trans-impedance amplifier (A
1) and described the second trans-impedance amplifier (A
2) the differential voltage V of output photoelectric conversion
1-V
2
2. a kind of photoelectric switching circuit according to claim 1, is characterized in that, described circuit also comprises: the first electric capacity (C
1) and the second electric capacity (C
2),
Described the first electric capacity (C
1) described the first resistance (R is connected in parallel
1), described the second electric capacity (C
2) described the second resistance (R is connected in parallel
2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100471310A CN103178748A (en) | 2013-02-05 | 2013-02-05 | Photoelectric conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100471310A CN103178748A (en) | 2013-02-05 | 2013-02-05 | Photoelectric conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103178748A true CN103178748A (en) | 2013-06-26 |
Family
ID=48638406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100471310A Pending CN103178748A (en) | 2013-02-05 | 2013-02-05 | Photoelectric conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103178748A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502312A (en) * | 2014-11-26 | 2015-04-08 | 四川凯乐检测技术有限公司 | Hydraulic system oil pollution degree detection system provided with fluorinated epoxy resin coating layer |
| CN104598811A (en) * | 2015-01-23 | 2015-05-06 | 浙江远望软件有限公司 | Starting method for safe operation environment of program |
| CN106992761A (en) * | 2017-02-23 | 2017-07-28 | 华为技术有限公司 | A kind of trans-impedance amplifier, chip and communication equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326545A (en) * | 1998-11-18 | 2001-12-12 | 艾利森电话股份有限公司 | Detection circuit |
| US20030090326A1 (en) * | 2001-11-14 | 2003-05-15 | Victor Pogrebinsky | Transimpedance amplifier with dual gain outputs |
-
2013
- 2013-02-05 CN CN2013100471310A patent/CN103178748A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326545A (en) * | 1998-11-18 | 2001-12-12 | 艾利森电话股份有限公司 | Detection circuit |
| US20030090326A1 (en) * | 2001-11-14 | 2003-05-15 | Victor Pogrebinsky | Transimpedance amplifier with dual gain outputs |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502312A (en) * | 2014-11-26 | 2015-04-08 | 四川凯乐检测技术有限公司 | Hydraulic system oil pollution degree detection system provided with fluorinated epoxy resin coating layer |
| CN104598811A (en) * | 2015-01-23 | 2015-05-06 | 浙江远望软件有限公司 | Starting method for safe operation environment of program |
| CN106992761A (en) * | 2017-02-23 | 2017-07-28 | 华为技术有限公司 | A kind of trans-impedance amplifier, chip and communication equipment |
| CN106992761B (en) * | 2017-02-23 | 2019-09-20 | 华为技术有限公司 | A kind of trans-impedance amplifier, chip and communication equipment |
| CN110661500A (en) * | 2017-02-23 | 2020-01-07 | 华为技术有限公司 | Transimpedance amplifier, chip and communication equipment |
| US10637416B2 (en) | 2017-02-23 | 2020-04-28 | Huawei Technologies Co., Ltd. | Trans-impedance amplifier, chip, and communications device |
| US11095259B2 (en) | 2017-02-23 | 2021-08-17 | Huawei Technologies Co., Ltd. | Trans-impedance amplifier, chip, and communications device |
| US11652456B2 (en) | 2017-02-23 | 2023-05-16 | Huawei Technologies Co., Ltd. | Trans-impedance amplifier, chip, and communications device |
| CN110661500B (en) * | 2017-02-23 | 2023-09-12 | 华为技术有限公司 | Transimpedance amplifier, chip and communication equipment |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130626 |