CN203933547U - A kind of micro-amplification circuit of electrical signal for handheld device - Google Patents
A kind of micro-amplification circuit of electrical signal for handheld device Download PDFInfo
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- CN203933547U CN203933547U CN201420252908.7U CN201420252908U CN203933547U CN 203933547 U CN203933547 U CN 203933547U CN 201420252908 U CN201420252908 U CN 201420252908U CN 203933547 U CN203933547 U CN 203933547U
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- operational amplifier
- signal
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- photomultiplier
- amplification circuit
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Abstract
The utility model discloses a kind of micro-amplification circuit of electrical signal for handheld device, this testing circuit is comprised of photomultiplier D, operational amplifier A, capacitor C 1, C2 and C3, resistance R 1, R2 and R3, the PIN photodiode that described photomultiplier D is large photosensistive surface, described operational amplifier A is the high input impedance operational amplifier of CA3130 model, and the faint detectable signal being obtained by photodiode is transported to the frequency selecting and filter unit of circuit through this low noise pre-amplification circuit.This slight photo-electric signal testing circuit is simple in structure, with low cost, has the advantages such as high cmrr, high input impedance, low noise, low linearity error, and the filtering and the collection that can be ordered data provide stable, reliable analog signal.
Description
Technical field
The utility model belongs to electric and electronic technical field, relates in particular to a kind of micro-amplification circuit of electrical signal for handheld device.
Background technology
Photoelectric detecting technology is that optics combines with electronics and an emerging detection technique producing, it mainly utilizes electronic technology to detect optical signalling, and further transmit, store, control, calculate and show. photoelectric detecting technology can detect the non electrical quantity that all can affect light quantity and light characteristic in principle, it can become the optical information for ease of accepting non electrical quantity information conversion to be detected by optical system, then with photoelectric detector, optical information capacity is transformed into electric weight, and further through oversampling circuit, amplify, process, to reach the object of signal of telecommunication output.The particularly detection of small-signal, as photoelectric coupling transducer, photomultiplier, photovoltaic detector, the front end output signal of infrared photoelectric detector etc. the signal of these transducer outputs generally is small-signal, want comprehensively to understand these output signal information, faint photosignal need to be amplified to processing, for follow-up data acquisition and exploitation provide research foundation. therefore, weak signal amplifier technology is very important key technology, the object of Detection of Weak Signals is from very noisy, to extract useful signal, improve the signal to noise ratio of detection system output signal simultaneously.
A linearity is good, the opto-electronic conversion that stability is high and signal amplification circuit, most important to test macro, it directly affects the index such as certainty of measurement, repeatable accuracy, stability of whole system, meanwhile, system detectivity is relevant with the quantity of the small-signal molecule receiving.
Summary of the invention
The defect and the deficiency that for above-mentioned prior art, exist, the purpose of this utility model is, a kind of micro-amplification circuit of electrical signal for handheld device is provided, of the present utility model can realization amplified processing to faint optical signal, have the advantages such as high cmrr, high input impedance, low noise, low linearity error, the filtering and the collection that can be ordered data provide stable, reliable analog signal.
In order to realize above-mentioned task, the utility model adopts following technical solution:
A micro-amplification circuit of electrical signal for handheld device, is characterized in that, comprises photomultiplier D, operational amplifier A, capacitor C 1, C2 and C3, resistance R 1, R2 and R3; The negative pole of described photomultiplier D is connected with the power supply of+15V, and the positive pole of D is connected with the negative pole of capacitor C 1; The output of described operational amplifier A (4) is connected with signal output part Vout, the power supply of connect+5V of the power end of operational amplifier A (5), the earth terminal of operational amplifier A (3) ground connection; The described positive pole of capacitor C 1 and the inverting input of operational amplifier A (1) are connected, the described positive pole of capacitor C 2 and the in-phase input end of A (2) are connected, the negative pole of C2 is connected to the ground, and the positive pole of described capacitor C 3 is connected with the output of A (4); Described resistance R 1 is connected between the negative pole and ground of photomultiplier D, and described resistance R 2 is in parallel with capacitor C 2, and described resistance R 3 is connected between the output 4 of operational amplifier A and the backward end (1) of A; Described photomultiplier D is the high-performance optical signal sensor of H7712 model; Described operational amplifier A is the high input impedance operational amplifier of CA3130 model.
The beneficial effects of the utility model are:
The received signal of photodetector is generally all very faint, and the signal of photo-detector output is often deeply buried among noise, therefore, to such small-signal be amplified and be processed, generally first carry out preliminary treatment, so that most of noise filtering is fallen, and small-signal is amplified to the desired voltage amplitude of subsequent treatment device, photoelectric conversion module is mainly to transfer the light signal that incides its photosurface of H7712 photomultiplier to the signal of telecommunication, multiplier tube output be generally current signal, thereby before amplifying, signal needs this current signal to transfer voltage signal to, then, utilize high-gain, low noise integrated transporting discharging amplifies processing to signal, recycling single-chip microcomputer and A/D converter carry out the acquisition process of signal.
A linearity is good, the opto-electronic conversion that stability is high and signal amplification circuit, most important to test macro, it directly affects the index such as certainty of measurement, repeatable accuracy, stability of whole system, meanwhile, system detectivity is relevant with the quantity of the small-signal molecule receiving.H7712 photomultiplier is the high-performance detector that light signal receives, can detect 0.1 small-signal molecule/um2, it belongs to low noise high-responsivity photodetector, in many low level light signal checkout systems, be widely used, what the fluorescent signals .H7712 photomultiplier that particularly medical science detects was exported is micro-current signal, the low-light electronic signal detecting in order effectively to detect it, need to amplify processing.For the input of complex environment, need to analyze from many aspects the detection circuit feature of required design.D is photomultiplier, and when photomultiplier receives useful signal, it changes luminous energy into electric energy, and Vout is the voltage signal of output.In order to meet the requirement of A/D conversion, also must amplify processing to the signal of output.Testing circuit adopts T-shaped amplifying circuit type amplifying circuit can obtain very high multiplication factor by changing resistance, and can improve input impedance. and in circuit, Vout is output signal, and it can directly be connected with frequency selecting and filter unit.
This ultra-weak electronic signal amplification circuit structure is simple, with low cost, has the advantages such as high cmrr, high input impedance, low noise, low linearity error, and the filtering and the collection that can be ordered data provide stable, reliable analog signal.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments the utility model is further explained explanation.
Fig. 1 is a kind of micro-amplification circuit of electrical signal schematic diagram for handheld device.
Embodiment
If Fig. 1 is a kind of micro-amplification circuit of electrical signal schematic diagram for handheld device, comprise photomultiplier D, operational amplifier A, capacitor C 1, C2 and C3, resistance R 1, R2 and R3; The negative pole of described photomultiplier D is connected with the power supply of+15V, and the positive pole of D is connected with the negative pole of capacitor C 1; The output 4 of described operational amplifier A is connected with signal output part Vout, the power supply of the connect+5V of power end 5 of operational amplifier A, earth terminal 3 ground connection of operational amplifier A; The described positive pole of capacitor C 1 and the inverting input of operational amplifier A 1 are connected, and the described positive pole of capacitor C 2 and the in-phase input end of A 2 are connected, and the negative pole of C2 is connected to the ground, and the positive pole of described capacitor C 3 is connected with the output of A 4; Described resistance R 1 is connected between the negative pole and ground of photomultiplier D, and described resistance R 2 is in parallel with capacitor C 2, and described resistance R 3 is connected between the output 4 of operational amplifier A and the backward end 1 of A; Described photomultiplier D is the high-performance optical signal sensor of H7712 model; Described operational amplifier A is the high input impedance operational amplifier of CA3130 model.
Except above-mentioned, general technical staff of the technical field of the invention also can understand, in this explanation and illustrated specific embodiment, can further change combination.For example, high input impedance operational amplifier that can CA3130 model is replaced by the operational amplifier of other types according to actual condition.
Claims (3)
1. for a micro-amplification circuit of electrical signal for handheld device, it is characterized in that, comprise photomultiplier D, operational amplifier A, capacitor C 1, C2 and C3, resistance R 1, R2 and R3; The negative pole of described photomultiplier D is connected with the power supply of+15V, and the positive pole of D is connected with the negative pole of capacitor C 1; The output of described operational amplifier A (4) is connected with signal output part Vout, the power supply of connect+5V of the power end of operational amplifier A (5), the earth terminal of operational amplifier A (3) ground connection; The described positive pole of capacitor C 1 and the inverting input of operational amplifier A (1) are connected, the described positive pole of capacitor C 2 and the in-phase input end of A (2) are connected, the negative pole of C2 is connected to the ground, and the positive pole of described capacitor C 3 is connected with the output of A (4); Described resistance R 1 is connected between the negative pole and ground of photomultiplier D, and described resistance R 2 is in parallel with capacitor C 2, and described resistance R 3 is connected between the output 4 of operational amplifier A and the backward end (1) of A.
2. a kind of micro-amplification circuit of electrical signal for handheld device as claimed in claim 1, is characterized in that, described photomultiplier D is the high-performance optical signal sensor of H7712 model.
3. a kind of micro-amplification circuit of electrical signal for handheld device as claimed in claim 1, is characterized in that, described operational amplifier A is the high input impedance operational amplifier of CA3130 model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420252908.7U CN203933547U (en) | 2014-05-17 | 2014-05-17 | A kind of micro-amplification circuit of electrical signal for handheld device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420252908.7U CN203933547U (en) | 2014-05-17 | 2014-05-17 | A kind of micro-amplification circuit of electrical signal for handheld device |
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| CN203933547U true CN203933547U (en) | 2014-11-05 |
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| CN201420252908.7U Expired - Fee Related CN203933547U (en) | 2014-05-17 | 2014-05-17 | A kind of micro-amplification circuit of electrical signal for handheld device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442387A (en) * | 2016-11-16 | 2017-02-22 | 江苏智石科技有限公司 | Soil component content detecting device based on photoelectric detection |
| CN108109324A (en) * | 2017-12-21 | 2018-06-01 | 无锡蓝天电子股份有限公司 | A kind of smoke detector based on photoelectric sensing structure |
| CN108923754A (en) * | 2018-04-08 | 2018-11-30 | 安徽师范大学 | A kind of photo detector signal amplifying device |
| CN109297609A (en) * | 2018-11-23 | 2019-02-01 | 大连航创科技有限公司 | A kind of Dim light measurement device |
| CN113517918A (en) * | 2021-04-12 | 2021-10-19 | Tcl通讯（宁波）有限公司 | Signal amplification circuit and signal amplification handheld mobile device |
-
2014
- 2014-05-17 CN CN201420252908.7U patent/CN203933547U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442387A (en) * | 2016-11-16 | 2017-02-22 | 江苏智石科技有限公司 | Soil component content detecting device based on photoelectric detection |
| CN108109324A (en) * | 2017-12-21 | 2018-06-01 | 无锡蓝天电子股份有限公司 | A kind of smoke detector based on photoelectric sensing structure |
| CN108109324B (en) * | 2017-12-21 | 2023-06-30 | 无锡蓝天电子股份有限公司 | Smoke detector based on photoelectric sensing structure |
| CN108923754A (en) * | 2018-04-08 | 2018-11-30 | 安徽师范大学 | A kind of photo detector signal amplifying device |
| CN109297609A (en) * | 2018-11-23 | 2019-02-01 | 大连航创科技有限公司 | A kind of Dim light measurement device |
| CN113517918A (en) * | 2021-04-12 | 2021-10-19 | Tcl通讯（宁波）有限公司 | Signal amplification circuit and signal amplification handheld mobile device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xu Yunpeng Inventor after: Wang Shan Inventor before: Xu Yunpeng |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: XU YUNPENG TO: XU YUNPENG WANG SHAN |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20150517 |
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| EXPY | Termination of patent right or utility model |