CN203276080U - Single-proton detector bias voltage generating circuit based on avalanche photodiode - Google Patents
Single-proton detector bias voltage generating circuit based on avalanche photodiode Download PDFInfo
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- CN203276080U CN203276080U CN 201320055139 CN201320055139U CN203276080U CN 203276080 U CN203276080 U CN 203276080U CN 201320055139 CN201320055139 CN 201320055139 CN 201320055139 U CN201320055139 U CN 201320055139U CN 203276080 U CN203276080 U CN 203276080U
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Abstract
The utility model discloses a single-proton detector bias voltage generating circuit based on an avalanche photodiode. The output end of an adjustable voltage output DAC is electrically connected with an inverse-phase input end of a low-voltage precision operational amplifying circuit, and the inverse-phase input end of the low-voltage precision operational amplifying circuit is electrically connected with a voltage benchmark circuit; a capacitor C is arranged between the output end and the inverse-phase input end of the low-voltage precision operational amplifying circuit; the inverse-phase input end of the low-voltage precision operational amplifying circuit is also grounded through a resistor R3; the output end of the low-voltage precision operational amplifying circuit is also electrically connected with a transmitting electrode of a triode through a resistor R4; a collector electrode of the triode is electrically connected with the inverse-phase input end of the low-voltage precision operational amplifying circuit through a resistor R5 and a resistor R6, which are connected with each other in serial; one end of a resistor R8 is electrically connected with the collector electrode of the triode, and the other end is used for supplying stable adjustable output bias voltage to the avalanche photodiode. The single-proton detector is simple in structure, low in cost, stable in output voltage and capable of meeting the requirement of the single-proton detector on the stability of the quantum efficiency.
Description
Technical field
The utility model relates to a kind of single-photon detector and the bias generating circuit that designs, relates in particular to a kind of single-photon detector based on avalanche photodide.
Background technology
In optical communication, the photon energy of two important wavelength 1310nm and 1550nm is respectively 1.526x10-19J and 1.281x10-19J.Measure low like this luminous energy, the normal APD that selects InGaAsP/InP, and make APD work in (Geiger mode angular position digitizer) on avalanche breakdown voltage, namely by (gate signal of usually synchronizeing time of arrival at one of the upper superposition of 40V ~ 60V) and photon is to bring into play its limiting snesibility at the bias voltage of APD negative electrode.The amplitude of bias voltage and gate signal can affect quantum efficiency, and in temperature one regularly, bias voltage is larger, and the interface electric field is higher, and the probability of charge carrier triggering avalanche increases greatly, and multiplication factor also increases thereupon, and quantum efficiency increases.But be not that to be added in cathode voltage higher, quantum efficiency is just larger.Because the restriction of APD self structure and device quality has a limit quantum efficiency.In addition when the reverse biased of apd during higher than avalanche breakdown voltage, the any small shake of bias voltage can change the size of APD interface field intensity, the avalanche gain that not only can have influence on APD also can be for detector has brought non-photon pulse noise, as shot noise, additional noise etc.Therefore, the APD bias generator that is used as single-photon detector must satisfy following condition: the first, and it is enough high that voltage is wanted, more than can reaching the avalanche breakdown voltage of APD; The second, Dc bias is adjustable continuously.The 3rd, can provide enough electric currents, the requirement that when satisfying the APD snowslide, electric current increases rapidly; The 4th, enough little ripple be arranged, reduce the noise that brings due to the supply voltage shake as far as possible.This just means the enough height of voltage stability of the reverse biased of APD.Traditional APD bias generating circuit roughly has two kinds, a kind of DAC of being, voltage reference add the switch power source design, as shown in Figure 1, realize exporting the adjustable continuously of high pressure with the Voltage Feedback input terminal voltage of the direct gauge tap power supply of DAC, the sort circuit output voltage ripple is large; Cardinal principle is to export variable voltage by DAC to change supply voltage switch feedback input end (VFB) voltage, thereby changes the output voltage of Switching Power Supply.Wherein DAC voltage is delivered to after VFB by the inner integrated PWM comparison amplifier of Switching Power Supply and is processed, and this amplifier precision is nowhere near, and temperature is floated relatively can be very large, causes the most at last switch power source output voltage unstable.When this scheme is used for single-photon detector, quantum efficiency is very sensitive to temperature variation.。Another kind is DAC, voltage reference, the high-voltage power supply amplifier scheme that adds high pressure, and as shown in Figure 2, when carrying out voltage amplification due to one-level high pressure amplifier, the output offset voltage can be very large, so added the accurate amplifier of one-level low pressure.But the offset voltage that during identical gain, the high pressure amplifier is introduced still than the accurate amplifier of low pressure introduce much larger; This scheme cost is relatively high, and guarantee that output voltage stabilization also must add a low pressure amplifier and carry out the prime amplification, to cause exporting offset voltage very large due to the too high meeting of gain if amplified by one-level high pressure amplifier, and offset voltage can vary with temperature significantly, and output voltage will be very responsive to the variation of temperature like this.
The utility model content
The purpose of this utility model is to provide a kind of single-photon detector bias generating circuit based on avalanche photodide.This is simple in structure based on the single-photon detector bias generating circuit of avalanche photodide, cost is low, output voltage stabilization.
For realizing above-mentioned technical purpose problem, the technical scheme that the utility model is taked is: a kind of single-photon detector bias generating circuit based on avalanche photodide comprises voltage reference circuit, adjustable voltage output DAC, the accurate discharge circuit of low pressure; Described voltage reference circuit is for generation of the reference voltage of 2.5V; Described adjustable voltage output DAC is used for the output adjustable voltage; Described voltage reference circuit provides power supply for adjustable voltage output DAC, the accurate discharge circuit of low pressure and triode simultaneously; It is characterized in that: also comprise triode; Described adjustable voltage output DAC and the accurate amplifier of low pressure are electrically connected to; The accurate fortune of described low pressure circuit is put and is comprised integrated transporting discharging A, capacitor C, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6; The output terminal of described adjustable voltage output DAC is electrically connected to by the inverting input of resistance R 1 with the accurate discharge circuit of low pressure, and the inverting input of the accurate discharge circuit of low pressure also is electrically connected to voltage reference circuit by resistance R 2; Capacitor C is connected between the output terminal and inverting input of the accurate discharge circuit of low pressure; The inverting input of the accurate discharge circuit of low pressure is also by resistance R 3 ground connection; The output terminal of the accurate discharge circuit of low pressure also is electrically connected to the emitter of triode by resistance R 4; The collector of triode is electrically connected to the inverting input of the accurate discharge circuit of low pressure by resistance R 5 and the resistance R 6 of two series connection; Resistance R 7 one ends are electrically connected to the collector of triode, and the other end is used for connecting high-voltage DC power supply; Resistance R 8 one ends are electrically connected to the collector of triode, and the other end is used to avalanche photodide that stable adjustable output offset voltage is provided.
As the further improved technical scheme of the utility model, the other end of described resistance R 7 is used for connecting the high-voltage DC power supply of 75 volts.
The utility model has removed traditional high pressure amplifier and has introduced triode, and circuit design is simple, and has reduced cost, and wherein triode has been brought into play its high voltage bearing effect and the integrated transporting discharging output current adjusted to realize the negative feedback of integrated transporting discharging.Integrated transporting discharging is adjusted to the voltage of the inverting input of integrated transporting discharging by negative feedback that to be input to the voltage of in-phase input end of integrated transporting discharging amplifier identical with adjustable voltage output DAC, makes the voltage stability of adjustable voltage output DAC and the inverting input of integrated transporting discharging get the stable consistent of voltage.Adjustable output offset voltage only depends on the precision of the accurate discharge circuit of low pressure, temperature is floated dropped to minimumly, makes output offset voltage very stable, thereby has satisfied the requirement of single-photon detector to quantum efficiency stability.In a word, the utility model is simple in structure, cost is low, output voltage stabilization, has satisfied the requirement of single-photon detector to quantum efficiency stability.
Description of drawings
Fig. 1 is existing the first tradition bias generating circuit scenario-frame schematic diagram.
Fig. 2 is existing the second tradition bias generating circuit scenario-frame schematic diagram
Fig. 3 is structural representation of the present utility model.
Fig. 4 is electrical block diagram of the present utility model.
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
Embodiment
Embodiment 1
Referring to Fig. 3 and Fig. 4, this comprises voltage reference circuit, adjustable voltage output DAC, the accurate discharge circuit of low pressure based on the single-photon detector bias generating circuit of avalanche photodide; Described voltage reference circuit is for generation of the reference voltage of 2.5V; Described adjustable voltage output DAC is used for the output adjustable voltage; Described voltage reference circuit provides power supply for adjustable voltage output DAC, the accurate discharge circuit of low pressure and triode simultaneously; Also comprise triode; Described adjustable voltage output DAC and the accurate amplifier of low pressure are electrically connected to; The accurate fortune of described low pressure circuit is put and is comprised integrated transporting discharging A, capacitor C, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6; The output terminal of described adjustable voltage output DAC is electrically connected to by the inverting input of resistance R 1 with the accurate discharge circuit of low pressure, and the inverting input of the accurate discharge circuit of low pressure also is electrically connected to voltage reference circuit by resistance R 2; Capacitor C is connected between the output terminal and inverting input of the accurate discharge circuit of low pressure; The inverting input of the accurate discharge circuit of low pressure is also by resistance R 3 ground connection; The output terminal of the accurate discharge circuit of low pressure also is electrically connected to the emitter of triode by resistance R 4; The collector of triode is electrically connected to the inverting input of the accurate discharge circuit of low pressure by resistance R 5 and the resistance R 6 of two series connection; Resistance R 7 one ends are electrically connected to the collector of triode, and the other end is used for connecting high-voltage DC power supply; Resistance R 8 one ends are electrically connected to the collector of triode, and the other end is used to avalanche photodide that stable adjustable output offset voltage is provided.The other end of described resistance R 7 is used for connecting the high-voltage DC power supply of 75 volts.
In the present embodiment, the stability of adjustable bias output voltage, namely the stability of VDC is determined by the accurate amplifier of low pressure fully.Its principle integrated transporting discharging is adjusted to the voltage of the inverting input of integrated transporting discharging by negative feedback that to be input to the voltage of in-phase input end of integrated transporting discharging amplifier identical with adjustable voltage output DAC, makes the voltage stability of adjustable voltage output DAC and the inverting input of integrated transporting discharging get the stable consistent of voltage.And this stability is to be determined by the accurate discharge circuit of low pressure itself fully.Wherein triode has been brought into play its high voltage bearing effect and the amplifier output current has been adjusted to realize the negative feedback of amplifier.The present embodiment has removed traditional high pressure amplifier and has introduced triode, and circuit design is simple, and has reduced cost; Adjustable output offset voltage only depends on the precision of the accurate discharge circuit of low pressure, temperature is floated dropped to minimumly, makes output offset voltage very stable, has satisfied the requirement of single-photon detector to quantum efficiency stability.
Claims (2)
1. the single-photon detector bias generating circuit based on avalanche photodide, comprise voltage reference circuit, adjustable voltage output DAC, the accurate discharge circuit of low pressure; Described voltage reference circuit is for generation of the reference voltage of 2.5V; Described adjustable voltage output DAC is used for the output adjustable voltage; Described voltage reference circuit provides power supply for adjustable voltage output DAC, the accurate discharge circuit of low pressure and triode simultaneously; It is characterized in that: also comprise triode; Described adjustable voltage output DAC and the accurate amplifier of low pressure are electrically connected to; The accurate fortune of described low pressure circuit is put and is comprised integrated transporting discharging A, capacitor C, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6; The output terminal of described adjustable voltage output DAC is electrically connected to by the inverting input of resistance R 1 with the accurate discharge circuit of low pressure, and the inverting input of the accurate discharge circuit of low pressure also is electrically connected to voltage reference circuit by resistance R 2; Capacitor C is connected between the output terminal and inverting input of the accurate discharge circuit of low pressure; The inverting input of the accurate discharge circuit of low pressure is also by resistance R 3 ground connection; The output terminal of the accurate discharge circuit of low pressure also is electrically connected to the emitter of triode by resistance R 4; The collector of triode is electrically connected to the inverting input of the accurate discharge circuit of low pressure by resistance R 5 and the resistance R 6 of two series connection; Resistance R 7 one ends are electrically connected to the collector of triode, and the other end is used for connecting high-voltage DC power supply; Resistance R 8 one ends are electrically connected to the collector of triode, and the other end is used to avalanche photodide that stable adjustable output offset voltage is provided.
2. the single-photon detector bias generating circuit based on avalanche photodide according to claim 1 is characterized in that: the other end of described resistance R 7 is used for connecting the high-voltage DC power supply of 75 volts.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320055139 CN203276080U (en) | 2013-01-31 | 2013-01-31 | Single-proton detector bias voltage generating circuit based on avalanche photodiode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320055139 CN203276080U (en) | 2013-01-31 | 2013-01-31 | Single-proton detector bias voltage generating circuit based on avalanche photodiode |
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| CN203276080U true CN203276080U (en) | 2013-11-06 |
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| CN 201320055139 Expired - Lifetime CN203276080U (en) | 2013-01-31 | 2013-01-31 | Single-proton detector bias voltage generating circuit based on avalanche photodiode |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104820229A (en) * | 2015-04-15 | 2015-08-05 | 北京空间机电研究所 | High-quantum-efficiency detector operation circuit for aiming at X-ray spectral band |
| CN105115608A (en) * | 2015-04-06 | 2015-12-02 | 安徽问天量子科技股份有限公司 | Clock signal and avalanche signal output device for infrared single-photon detector |
| US9823123B2 (en) | 2015-01-30 | 2017-11-21 | Industrial Technology Research Institute | System and method for controlling excess bias of single photon avalanche photo diode |
| CN108445946A (en) * | 2018-04-04 | 2018-08-24 | 安徽问天量子科技股份有限公司 | The temperature self-adaptation control circuit and method of APD in quantum key dispatching system |
| CN109471009A (en) * | 2017-09-08 | 2019-03-15 | 科大国盾量子技术股份有限公司 | Bias current value detection circuit and single-photon detector intensity light attack detection circuit, method |
| CN112424800A (en) * | 2018-05-11 | 2021-02-26 | D-波系统公司 | Single flux quantum source for projection measurement |
-
2013
- 2013-01-31 CN CN 201320055139 patent/CN203276080U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9823123B2 (en) | 2015-01-30 | 2017-11-21 | Industrial Technology Research Institute | System and method for controlling excess bias of single photon avalanche photo diode |
| CN105115608A (en) * | 2015-04-06 | 2015-12-02 | 安徽问天量子科技股份有限公司 | Clock signal and avalanche signal output device for infrared single-photon detector |
| CN105115608B (en) * | 2015-04-06 | 2018-02-06 | 安徽问天量子科技股份有限公司 | Ultrared single-photon detector clock signal and avalanche signal output device |
| CN104820229A (en) * | 2015-04-15 | 2015-08-05 | 北京空间机电研究所 | High-quantum-efficiency detector operation circuit for aiming at X-ray spectral band |
| CN109471009A (en) * | 2017-09-08 | 2019-03-15 | 科大国盾量子技术股份有限公司 | Bias current value detection circuit and single-photon detector intensity light attack detection circuit, method |
| CN109471009B (en) * | 2017-09-08 | 2023-11-03 | 科大国盾量子技术股份有限公司 | Bias value detection circuit and single photon detector strong light attack detection circuit and method |
| CN108445946A (en) * | 2018-04-04 | 2018-08-24 | 安徽问天量子科技股份有限公司 | The temperature self-adaptation control circuit and method of APD in quantum key dispatching system |
| CN112424800A (en) * | 2018-05-11 | 2021-02-26 | D-波系统公司 | Single flux quantum source for projection measurement |
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Address after: 241003 No. 12, Zhanghe Road, hi tech Zone, Anhui, Wuhu Patentee after: ANHUI ASKY QUANTUM TECHNOLOGY Co.,Ltd. Address before: 241002 Anhui science and technology innovation public service center, Wuhu national hi tech Zone, Yijiang Patentee before: ANHUI ASKY QUANTUM TECHNOLOGY Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20131106 |
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| CX01 | Expiry of patent term |