CN105403309B - Two-color detector signal amplification control system and method - Google Patents
Two-color detector signal amplification control system and method Download PDFInfo
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- CN105403309B CN105403309B CN201510742694.0A CN201510742694A CN105403309B CN 105403309 B CN105403309 B CN 105403309B CN 201510742694 A CN201510742694 A CN 201510742694A CN 105403309 B CN105403309 B CN 105403309B
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- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 96
- 230000003321 amplification Effects 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims description 16
- 230000005611 electricity Effects 0.000 claims description 12
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- 230000004313 glare Effects 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 7
- 238000012545 processing Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000003595 spectral effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/02—Manually-operated control
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- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
- Color Television Image Signal Generators (AREA)
Abstract
The invention discloses a two-color detector signal amplification control system comprising a two-color detector working band selection switch, a pre-amplification circuit, a filter circuit, multistage amplification circuits, an A/D conversion circuit, a microprocessor and an upper computer which are connected in series in turn. Each amplification circuit of the multistage amplification circuits is connected with a zero setting offset signal via a D/A conversion circuit and used for providing a zero setting analog signal for the multistage amplification circuits. The beneficial effects of the two-color detector signal amplification control system and method are that the gear is adjusted timely and a control signal is updated when the two-color detector working band selection switch is switched so as to be suitable for two working bands. Noise is effectively suppressed when the amplitude of a weak signal is increased according to the detected noise voltage values of different bands and different gears so that the signal-to-noise ratio and sensitivity of instruments can be enhanced.
Description
Technical field
The present invention relates to double-color detector technical field, more particularly to a kind of double-color detector signal amplification control system and
Method.
Background technology
In near-infrared spectrometers, the service band to enable instrument covers 600nm～1700nm, generally adopts
The double-colored photodetectors of Si-InGaAs.Double-color detector adopts two kinds of different combinations of detectors, double-colored in structure
Detector adopts up-down structure, topside sounder response short wavelength, long wavelength of lower floor's explorer response through topside sounder.
Using Si-InGaAs double-color detectors, by the segmentation of whole test wave band and respectively with the optical detection device of respective response wave band
Received, ensure that the spectral responsivity for having comparison high in the range of whole measure spectrum.Detector receives optical signal
Output current signal afterwards, the big circuit conversion of premenstrual storing is voltage signal, then amplified circuit carries out voltage amplification, eventually passes
A/D circuit conversions are data signal.Due to the Si-PIN and InGaAs-PIN of detector there are different spectral response curves with
And strong and weak different dark current, it is therefore desirable to the signal enhanced processing electricity of detector rear end is controlled for two kinds of different-wavebands
Road, and the signal amplification control system is the features such as also need to speed height, low noise, high resolution.Double-colored photodetection
The signal amplification control system direct relation of device the indexs such as signal to noise ratio, dynamic range, the minimum detectable power of spectroanalysis instrument
Parameter.
A kind of patent of invention " InGaAs short-wave infrareds detector signal processing system " (application number：201510119537.4)
Disclose a kind of by InGaAs short-wave infrared detectors, the single-ended change-over circuit of difference, signal condition filter circuit, analog-to-digital conversion electricity
The signal processing system of the part such as road, data processing circuit composition.InGaAs short-wave infrareds detector is by the optical signal for detecting
Be converted to differential electric signal and deliver to signal input part, signal input part includes the first source side resistance R1 and the second source side resistance R2.
The system realizes impedance matching, amplification, the support of master backup interface of signal by the single-ended change-over circuit of difference, and signal is again through letter
Number conditioning filter circuit processes the analog difference signal obtained in analog to digital conversion circuit input dynamic range, into analog-to-digital conversion electricity
Road exports parallel data signal, and digital filtering is realized in final incoming data process circuit and then parallel-serial conversion is carried out, and obtains
Corresponding serial data, and the data are packaged into into required data form.
A kind of patent of invention " control circuit of photoelectric sensor system gain stabilization " (application number：201410559435.X)
Disclose a kind of light being made up of amplifying circuit, pulsewidth shaping circuit, voltage discriminator circuit and control voltage dynamic regulation circuit
The stable control circuit of electric explorer system gain.Amplifying circuit is carried out to the current pulse signal that photodetector anode is exported
Amplify and convert thereof into voltage signal, pulsewidth shaping circuit removes useless pulse signal and is converted into spike signal solid
Determine the square wave frequency signal of pulsewidth, voltage discriminator circuit amplifies electricity by Upper threshold comparison voltage and the monitoring of Lower Threshold comparison voltage
Road exports the gain of pulse, and control voltage dynamic regulation circuit adjusts control voltage and adjusts light by the discharge and recharge of integrating capacitor
The operating voltage of electric explorer, gain stabilization control when realizing that photodetector works.
Si-InGaAs double-color detectors have two optical detection devices of Si-PIN and InGaAs-PIN, the two detections
Element is operated in respectively different-waveband, and the spectral response curve on each wave band is also different.In addition, optical system
The ambient noise that the dark current of veiling glare and detector itself is caused can be caused seriously after repeatedly amplifying to signals collecting
Affect, especially in Feebleness Light Signal Examining, ambient noise can flood signal.
Technology disclosed in above two patent does not account for the different problem of spectral responsivity of two wave bands, using list
One amplification control circuit, more cannot be in the two of double-color detector service bands being amplified to the signal of two wave bands
Between be switched fast.Simultaneously, it is impossible to meet multistage zeroing offset voltage during different gears under two kinds of wave bands, it is impossible to effectively eliminate
Detector dark current influence of noise.
The content of the invention
The purpose of the present invention is exactly to solve the above problems, it is proposed that a kind of double-color detector signal amplification control system
And method, the system and method can adapt to the selection signal of two kinds of wave bands, multiplication factor combination and filtering bandwidth control, and
There is provided multiple gears to select and video bandwidth setting.Simultaneously the signal amplification control system has level Four zeroing shifted signal compensation
Circuit, by D/A amplifier in is incorporated into, and effectively suppresses noise to increase the amplitude of small-signal, improves the letter of instrument
Make an uproar the index parameters such as ratio, dynamic range, minimum detectable power.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of double-color detector signal amplification control system, including：The double-color detector service band being sequentially connected in series
Selecting switch, pre-amplification circuit, filter circuit, multistage amplifier circuit, A/D change-over circuits, microprocessor and host computer；
Every one-level amplifying circuit of the multistage amplifier circuit by D/A change-over circuits connection zeroing shifted signal, is used
In for multistage amplifier circuit provide zeroing analog signal；
The microprocessor is realized to double-color detector service band by the preposition amplification control signal latch of control
Selection, the selection of the multiplication factor of pre-amplification circuit and the selection of anti-aliasing analogue filter circuit filtering bandwidth；It is described micro-
Processor amplifies output signal and latches the signal after selecting output to amplify by control.
Every one-level amplifying circuit of the multistage amplifier circuit is connected with video bandwidth control circuit, multistage for controlling
The analog signal bandwidth of amplifying circuit.
The size of the zeroing shifted signal determines according to the size per one-level amplifying circuit output noise magnitude of voltage.
The gear of the video bandwidth includes VBW1～VBW6.
The microprocessor selects the amplification shelves of multistage amplifier circuit by controlling multistage amplification control signal latch
Position and its video bandwidth of bandwidth control circuit.
The multistage amplifier circuit is level Four amplifying circuit.
The pre-amplification circuit turns voltage amplifier circuit for electric current, and the multiplication factor of the pre-amplification circuit selects shelves
Position includes：1k Ω, 10k Ω, 100k Ω, 1M Ω, 10M Ω and 100M Ω；Selected gear is latched by preposition amplification control signal
In sending into pre-amplification circuit.
The multilevel signal amplifying circuit is voltage amplifier circuit, and the multiplication factor of the multilevel signal amplifying circuit is selected
Gear includes：× 1 times, × 10 times, × 100 times, × 1000 times, × 10000 times；Selected gear is by multistage amplification control signal
Latch and send in multistage level amplifying circuit.
A kind of method of double-color detector signal amplification control system, including：
The current signal of double-color detector output is premenstrual to put big circuit conversion for voltage signal, through anti-aliasing simulation filter
Wave circuit is filtered after high-frequency noise, then Jing multistage amplifier circuits amplify, and eventually pass A/D change-over circuits and upload in host computer；
Microprocessor is addressed to access to each control port, and control port includes：Preposition amplification control signal is latched
Port, multistage zeroing shifted signal port, amplification control signal latch port, amplification output signal latch port；
Microprocessor is one fixed address of each port assignment, operation is written and read to corresponding address, by number
According to bus, control signal is respectively fed to into pre-amplification circuit, filter circuit and multistage amplifier circuit；Simulation after amplification is believed
After number conversion digital signal, the data/address bus of host computer is sent to；Host computer calculates zeroing offset voltage according to noise voltage size
Value, is converted to analog signal and feeds back to multistage amplifier circuit by the digital analog converter offset voltage data signal that will return to zero.
When input optical power is zero, microprocessor is detected respectively in multistage amplifier circuit per one-level amplifying circuit in two kinds of works
Make output noise magnitude of voltage when wave band and different gears, calculate inclined per the zeroing of one-level amplifying circuit according to the magnitude of voltage
Shifting signal；
The zeroing shifted signal provides direct current signal offset voltage for every one-level amplifying circuit, multistage when detecting again
When the output voltage of amplifying circuit is zero, show to have eliminated due to the dark electricity of the veiling glare and detector itself of optical system
The ambient noise of flow noise.
The invention has the beneficial effects as follows：
(1) 16 high speed microprocessors of the invention amplify control signal latch end to 16 locative prepositions by addressing system
Mouth, 12 zeroing shifted signals VAPort, 12 zeroing shifted signals VBPort, 12 zeroing shifted signals VCPort, 12 tune
Zero offset signal VDPort, 16 amplification control signal latch ports, 16 amplification board output signal selection switch control rule ports
Operation is written and read, host computer enters row selection signal, multiplication factor combination and the control of filtering bandwidth to circuit by data/address bus
System.
(2) gear control signal of the invention is used to controlling pre-amplification circuit, anti-aliasing analogue filter circuit and multistage
Amplifying circuit, system has the optional gear of 6 × 5 × 6=180 kinds and combines selection scheme.The present invention is in switching double-color detector
Service band selecting switch when, in time adjustment gear simultaneously updates control signal, to adapt to two kinds of service bands.
(3) signal amplification control system of the invention has level Four zeroing shifted signal compensation circuit, according to what is detected
Noise voltage value during different-waveband difference gear, arranges different zeroing offset voltage values, is incorporated into amplifier by D/A defeated
Enter end, the operational amplifier for level Four amplifying circuit provides level Four direct current signal offset voltage, in the amplitude of increase small-signal
While effectively suppress noise, improve instrument signal to noise ratio and sensitivity, spectrum when disclosure satisfy that faint optical signal is input into point
Analysis.
Description of the drawings
Fig. 1 is double-color detector signal amplification control system structural representation of the present invention；
Fig. 2 is that gear of the present invention combines system of selection schematic diagram.
Specific embodiment：
Below in conjunction with the accompanying drawings the present invention will be further described with embodiment：
A kind of double-color detector signal amplification control system, including：The double-color detector service band being sequentially connected in series
Selecting switch, pre-amplification circuit, filter circuit, multistage amplifier circuit, A/D change-over circuits, microprocessor and host computer；
Every one-level amplifying circuit of multistage amplifier circuit by D/A change-over circuits connection zeroing shifted signal, for for
Multistage amplifier circuit provides zeroing analog signal；The size of zeroing shifted signal is according to per one-level amplifying circuit output noise voltage
The size of value determines；
Microprocessor by control it is preposition amplify control signal latch realize the selection to double-color detector service band,
The selection of the multiplication factor of pre-amplification circuit and the selection of anti-aliasing analogue filter circuit filtering bandwidth；Microprocessor passes through
Control is amplified output signal and latches the signal after selecting output to amplify；Microprocessor is latched by the multistage amplification control signal of control
Device is selecting the video bandwidth for amplifying gear and its bandwidth control circuit of multistage amplifier circuit.
A kind of method of double-color detector signal amplification control system, including：
The current signal of double-color detector output is premenstrual to put big circuit conversion for voltage signal, through anti-aliasing simulation filter
Wave circuit is filtered after high-frequency noise, then Jing multistage amplifier circuits amplify, and eventually pass A/D change-over circuits and upload in host computer；
Microprocessor is addressed to access to each control port, and control port includes：Preposition amplification control signal is latched
Port, multistage zeroing shifted signal port, amplification control signal latch port, amplification output signal latch port；
Microprocessor is one fixed address of each port assignment, operation is written and read to corresponding address, by number
According to bus, control signal is respectively fed to into pre-amplification circuit, filter circuit and multistage amplifier circuit；Simulation after amplification is believed
After number conversion digital signal, the data/address bus of host computer is sent to；Host computer calculates zeroing offset voltage according to noise voltage size
Value, is converted to analog signal and feeds back to multistage amplifier circuit by the DAC offset voltage data signals that will return to zero.
When input optical power is zero, microprocessor is detected respectively in multistage amplifier circuit per one-level amplifying circuit in two kinds of works
Make output noise magnitude of voltage when wave band and different gears, calculate inclined per the zeroing of one-level amplifying circuit according to the magnitude of voltage
Shifting signal；
Zeroing shifted signal provides direct current signal offset voltage for every one-level amplifying circuit, when detecting multistage amplification again
When the output voltage of circuit is zero, show to have eliminated because the dark current of the veiling glare and detector itself of optical system is made an uproar
The ambient noise of sound.
The present embodiment is illustrated by taking level Four amplifying circuit as an example, as shown in figure 1, being used for using 16 high speed microprocessors
The working condition and the data exchange with host computer of control Acquisition Circuit, the electric current letter of Si-InGaAs double-color detectors output
It is number premenstrual that to put big circuit conversion be voltage signal, after anti-aliasing analogue filter circuit filters high-frequency noise, then Jing multistage
Amplifying circuit amplifies, and eventually passes A/D plates and carries out analog-to-digital conversion and uploads in host computer.
Wherein, preposition amplification control signal latches the amplification for controlling service band selecting switch, pre-amplification circuit
The filtering bandwidth selecting switch of multiple selecting switch and anti-aliasing analogue filter circuit；Level Four zeroing shifted signal be by D/A
Level Four amplifying circuit provides zeroing analog signal, is eliminated with this and is drawn by the dark current of the veiling glare and detector itself of optical system
The noise for rising；Amplification control signal latches the amplification GSS Gear Select Switch and its bandwidth control electricity for controlling level Four amplifying circuit
The video bandwidth on road；Amplify output signal to latch for the signal after selecting output to amplify.
16 high speed microprocessors are addressed to access to each control port, including 16 locative prepositions amplify control signal lock
Deposit port, 12 zeroing shifted signals VAPort, 12 zeroing shifted signals VBPort, 12 zeroing shifted signals VCPort, 12
Position zeroing shifted signal VDPort, 16 amplification control signal latch ports, 16 amplification board output signal selection switch control rules
Port.
Microprocessor is one fixed address of each port assignment, operation is written and read to corresponding address, by number
According to bus, 16 control signals are sent into into pre-amplification circuit, anti-aliasing analogue filter circuit and multistage amplifier circuit；Pass through
Analog signal after amplification is converted to 16 position digital signals by ADC, and is sent to the data/address bus of host computer；The process of Jing host computers will
12 zeroing offset voltage data signal Jing DAC are converted to analog signal and feed back to multistage amplifier circuit.
Pre-amplification circuit turns voltage amplification for electric current, 1k Ω that its optional gear has, 10k Ω, 100k Ω, 1M Ω,
Totally 6 grades of 10M Ω, 100M Ω, is latched by preposition amplification control signal and is sent in pre-amplification circuit.Amplifying circuit is put for voltage
Greatly, optional gear have × 1 times, × 10 times, × 100 times, × 1000 times, × 10000 times totally 5 grades, locked by amplification control signal
In depositing feeding level Four amplifying circuit, wherein × 1 times to refer to that signal is only not involved in voltage amplification through voltage follower directly defeated
Go out, remaining the 4 grades output signal multiplication factors for corresponding to level Four amplifying circuit respectively.
Signal amplification control system is provided with 6 video bandwidths (VBW1～6), and video bandwidth control circuit is multistage for controlling
The analog signal bandwidth of amplifying circuit.So the gear of control signal selects combination to have 6 × 5 × 6=180 kind alternatives,
As shown in Fig. 2 combining system of selection schematic diagram for gear, the sensing of wherein pointer is selected gear, inside and outside three rotating disks point
It is not preamplification board gear, amplification board gear and video bandwidth gear, rotating disk rotates clockwise gear and diminishes, rotates counterclockwise
Gear becomes big.System selects first the gear given tacit consent to combination to be sent to control circuit, the output signal after then monitoring is amplified, according to
Size adjustment gear (i.e. rotating disk rotate a lattice) of output signal, and constantly update control signal, is eventually until detect defeated
Go out voltage swing it is suitable till.When the service band selecting switch of double-color detector is switched, system will be immediately returned to what is given tacit consent to
Gear is combined, and recalculates and find the control signal of the service band for adapting to new.
In the case where slit is closed, the veiling glare of optical system and the dark current of detector can produced after amplifying
The obvious noise of life, needs are returned to zero in advance.When closing slit to be input optical power being zero, system detects that respectively level Four is amplified
Output noise magnitude of voltage f of the circuit in two kinds of service bands and different gearsa、fb、fc、fd, according to formula (1), (2),
(3), (4) calculate zeroing shifted signal VA、VB、VC、VD, wherein VrefFor the reference voltage level of DAC.
Zeroing shifted signal VA、VB、VC、VDBe it is related to optical system, double-color detector, amplification treatment circuit etc., often
Platform instrument has specific one group of zeroing shifted signal, the output noise electricity by it in two kinds of service bands and different gears
Pressure value is determined.By VA、VB、VC、VDBinary system is converted to, wherein highest order is sign bit, and is written to according to 12 position digital signals
DAC, is converted into analog signal, and the operational amplifier for level Four amplifying circuit provides level Four direct current signal offset voltage, when again
When the output voltage for detecting amplifying circuit is zero, show to have eliminated the veiling glare and detector itself due to optical system
Dark current noise ambient noise.After being provided with, system can pass through self-inspection such that it is able to normally complete double-colored spy
The signal for surveying device amplifies.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not to present invention protection model
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need the various modifications made by paying creative work or deformation still within protection scope of the present invention.
Claims (10)
1. a kind of double-color detector signal amplification control system, is characterized in that, including：The double-color detector work being sequentially connected in series
Make range switch, pre-amplification circuit, filter circuit, multistage amplifier circuit, A/D change-over circuits, microprocessor and on
Position machine；
Every one-level amplifying circuit of the multistage amplifier circuit by D/A change-over circuits connection zeroing shifted signal, for for
Multistage amplifier circuit provides zeroing analog signal；
The microprocessor by control it is preposition amplify control signal latch realize the selection to double-color detector service band,
The selection of the multiplication factor of pre-amplification circuit and the selection of anti-aliasing analogue filter circuit filtering bandwidth；The microprocessor
Output signal is amplified by control and latches the signal after selecting output to amplify.
2. a kind of double-color detector signal amplification control system as claimed in claim 1, is characterized in that, the multistage amplification electricity
Every one-level amplifying circuit on road is connected with video bandwidth control circuit, for controlling the analog signal band of multistage amplifier circuit
It is wide.
3. a kind of double-color detector signal amplification control system as claimed in claim 1, is characterized in that, the zeroing skew letter
Number size determined according to the size per one-level amplifying circuit output noise magnitude of voltage.
4. a kind of double-color detector signal amplification control system as claimed in claim 2, is characterized in that, the video bandwidth
Gear includes VBW1～VBW6.
5. a kind of double-color detector signal amplification control system as claimed in claim 1, is characterized in that, the microprocessor leads to
Cross and control multistage amplification control signal latch to select the amplification gear of multistage amplifier circuit and its regarding for bandwidth control circuit
Bandwidth.
6. a kind of double-color detector signal amplification control system as claimed in claim 1, is characterized in that, the multistage amplification electricity
Road is level Four amplifying circuit.
7. a kind of double-color detector signal amplification control system as claimed in claim 1, is characterized in that, the preposition amplification electricity
Road turns voltage amplifier circuit for electric current, and the multiplication factor of the pre-amplification circuit selects gear to include：1kΩ、10kΩ、100k
Ω, 1M Ω, 10M Ω and 100M Ω；Selected gear is latched by preposition amplification control signal and sent in pre-amplification circuit.
8. a kind of double-color detector signal amplification control system as claimed in claim 1, is characterized in that, the multistage amplification electricity
Road is voltage amplifier circuit, and the multiplication factor of the multistage amplifier circuit selects gear to include：× 1 times, × 10 times, × 100 times,
× 1000 times, × 10000 times；Selected gear is latched by multistage amplification control signal and sent in multistage level amplifying circuit.
9. a kind of method of double-color detector signal amplification control system as claimed in claim 1, is characterized in that, including：
The current signal of double-color detector output is premenstrual to put big circuit conversion for voltage signal, through anti-aliasing analog filtering electricity
Road is filtered after high-frequency noise, then Jing multistage amplifier circuits amplify, and eventually pass A/D change-over circuits and upload in host computer；
Microprocessor is addressed to access to each control port, and control port includes：Preposition amplification control signal latch port,
Multistage zeroing shifted signal port, amplification control signal latch port, amplification output signal latch port；
Microprocessor is one fixed address of each port assignment, and operation is written and read to corresponding address, total by data
Line, by control signal pre-amplification circuit, filter circuit and multistage amplifier circuit are respectively fed to；Analog signal after amplification is turned
After changing data signal, the data/address bus of host computer is sent to；Host computer calculates zeroing offset voltage value according to noise voltage size, leads to
Cross the digital analog converter offset voltage data signal that will return to zero to be converted to analog signal and feed back to multistage amplifier circuit.
10. a kind of method of double-color detector signal amplification control system as claimed in claim 9, is characterized in that, input light
When power is zero, microprocessor is detected respectively in multistage amplifier circuit per one-level amplifying circuit in two kinds of service bands and difference
Output noise magnitude of voltage during gear, according to the magnitude of voltage zeroing shifted signal per one-level amplifying circuit is calculated；
The zeroing shifted signal provides direct current signal offset voltage for every one-level amplifying circuit, when detecting multistage amplification again
When the output voltage of circuit is zero, show to have eliminated because the dark current of the veiling glare and detector itself of optical system is made an uproar
The ambient noise of sound.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510742694.0A CN105403309B (en) | 2015-11-04 | 2015-11-04 | Two-color detector signal amplification control system and method |
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| CN201510742694.0A CN105403309B (en) | 2015-11-04 | 2015-11-04 | Two-color detector signal amplification control system and method |
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| CN105403309B true CN105403309B (en) | 2017-05-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3718821A (en) * | 1971-10-29 | 1973-02-27 | G Vischulis | Automatically adjusting photoelectric position detector |
| CN2932335Y (en) * | 2006-04-04 | 2007-08-08 | 上海安誉智能科技有限公司 | Double-wavelength infrared flame detector |
| CN101651497A (en) * | 2008-08-13 | 2010-02-17 | 华为技术有限公司 | Gain control method for optical receiver and optical receiving device |
| CN104410378A (en) * | 2014-10-20 | 2015-03-11 | 北京空间机电研究所 | Gain stabilization control circuit for photoelectric detector system |
| CN104748858A (en) * | 2015-03-18 | 2015-07-01 | 北京空间机电研究所 | InGaAs shortwave infrared detector signal processing system |
-
2015
- 2015-11-04 CN CN201510742694.0A patent/CN105403309B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3718821A (en) * | 1971-10-29 | 1973-02-27 | G Vischulis | Automatically adjusting photoelectric position detector |
| CN2932335Y (en) * | 2006-04-04 | 2007-08-08 | 上海安誉智能科技有限公司 | Double-wavelength infrared flame detector |
| CN101651497A (en) * | 2008-08-13 | 2010-02-17 | 华为技术有限公司 | Gain control method for optical receiver and optical receiving device |
| CN104410378A (en) * | 2014-10-20 | 2015-03-11 | 北京空间机电研究所 | Gain stabilization control circuit for photoelectric detector system |
| CN104748858A (en) * | 2015-03-18 | 2015-07-01 | 北京空间机电研究所 | InGaAs shortwave infrared detector signal processing system |
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| CN105403309A (en) | 2016-03-16 |
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