CN206847792U - A kind of single photon detection quenching control circuit of high speed self feed back - Google Patents
A kind of single photon detection quenching control circuit of high speed self feed back Download PDFInfo
- Publication number
- CN206847792U CN206847792U CN201720752109.XU CN201720752109U CN206847792U CN 206847792 U CN206847792 U CN 206847792U CN 201720752109 U CN201720752109 U CN 201720752109U CN 206847792 U CN206847792 U CN 206847792U
- Authority
- CN
- China
- Prior art keywords
- quenching
- feed back
- photon
- photon detector
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Light Receiving Elements (AREA)
Abstract
A kind of single photon detection quenching control circuit of high speed self feed back, including single-photon detector, bias voltage units and gating pulse unit, and the negative electrode of single-photon detector passes through resistance Rq connection bias voltage units, the anode of single-photon detector is grounded by resistance Rs, control circuit also includes active self feed back quenching circuit unit, active self feed back quenching circuit unit is connected to the anode of single-photon detector, and active self feed back quenching circuit unit includes filter amplifier, comparator, quenching control unit and result of detection output unit.Compared with prior art, the utility model carries out quenching control using active self feed back quenching circuit unit to the single-photon detector that snowslide triggers, the quenching circuit and method can not only accurately detect faint avalanche signal within the extremely short time, what can be exceedingly fast simultaneously is quenched snowslide and resets, the detection efficient of single photon is greatly improved, also reduces the lengthy and jumbled degree of circuit system and the cost of system realization to a certain extent.
Description
Technical field
Quantum secret communication and faint optical signal technical field are the utility model is related to, more particularly to a kind of high speed self feed back
Single photon detection quenching control circuit and control method.
Background technology
Single-photon detecting survey technology is a kind of method for realizing single photon magnitude faint light detection, in quantum communications, spectrum
There is quite varied application in the fields such as measurement, radioactivity detection, high-energy physics, astronomical ranging, laser radar.In current quantum
In communication experiment, a large amount of to be encoded and handled as information carrier using the state of single photon, single-photon detecting survey technology is at it
In play extremely crucial effect.
Avalanche photodide (APD) single-photon detector with its small volume, low-power consumption, high-performance, it is practical the features such as
Widely used in quantum communications experiment.APD spectral response coverage is very wide, mainly there is three kinds：Si-APD、Ge-APD、
InGaAs/InP-APD, 400nm~1100nm, 800nm~1550nm are correspond to respectively, 900nm~1700nm different-wavebands
Light.In corresponding quantum communications window, the energy of single photon is all 10-19J magnitudes, reach the detectivity of existing detector
The limit, research and the quenching actuation techniques for improving APD, effective detection of single photon signal can be achieved.
The parameter such as the core devices obtained as quantum signal, the detection efficient of single-photon detector, dark counting, counting rate
Directly affect the transmission range of quantum communications and into key performances such as code checks.The factors such as detection efficient, dark counting are limited by spy
The performance of device in itself is surveyed, and counting rate is mainly determined by the dead time of control drive circuit.
So-called Geiger mode angular position digitizer is usually operated in single photon detection application, i.e. the bias voltage at APD both ends is higher than it
Avalanche voltage.In Geiger mode angular position digitizer, once the carrier for having photon or being thermally generated reaches triggering avalanche, electricity is just produced in circuit
Signal pulse stream.In order to ensure the trouble free service of device, it is necessary to using appropriate quenching drive circuit, make snowslide rapid after occurring
Ground cuts off snowslide, and APD is returned to the state for receiving photon.
The quenching mode of single-photon detector typically has three kinds：Passive quenching, actively quench and gate mode.Passively
Quenching circuit reduces APD reverses biased using resistant series, and its dead time is larger, influences single photon detection efficiency.Actively quench
Snowslide can be quickly quenched in fire by the way of self feed back, and the level returned within a very short time before snowslide, its advantage are dead
Time is short, but usual complex circuit designs.Gate mode is usually used in single photon detection known to photon arrival time, uses door
Control signal carries out quenching control, and its advantage is can effectively to reduce dark counting and afterpulse probability of happening, but requires gate signal and light
Signal is precisely synchronous, and can not reduce the dead time of circuit reading, and high-speed applications are limited to counting rate.
Utility model content
The utility model purpose is the single photon detection quenching control circuit for providing a kind of high speed self feed back, is to realize
System can accurately differentiate faint avalanche signal within the extremely short time, snowslide is quenched in time and resets, can effectively suppression system make an uproar
Sound, realize the technique effect of the high-speed detection of single photon signal.
What the technical solution of the utility model was realized in：
A kind of single photon detection quenching control circuit of high speed self feed back, including single-photon detector, bias voltage units
And gating pulse unit, the negative electrode of single-photon detector is connected with bias voltage units, gating pulse unit respectively, and monochromatic light
The negative electrode of sub- detector is grounded by resistance Rq connection bias voltage units, the anode of single-photon detector by resistance Rs, institute
Stating control circuit also includes active self feed back quenching circuit unit, and the active self feed back quenching circuit unit is connected to single photon
The anode of detector, active self feed back quenching circuit unit include filter amplifier, comparator, quenching control unit and
Result of detection output unit, the anode of the input connection single-photon detector of the filter amplifier, the filter amplifier
Output end be sequentially connected comparator, quenching control unit and result of detection output unit, the one of the quenching control unit
Output end is connected with the voltage controller that the rise of single-photon detector anode terminal voltage can be made to cause single-photon detector snowslide to extinguish
S_quench, described voltage controller S_quench one end are connected with the power supply V_ for balancing single-photon detector bias voltage
Q, other end connection single-photon detector anode.
Preferably, the quenching control unit includes the first d type flip flop and the first delay chip T1, the first D are touched
The S interfaces connection comparator of device is sent out, the R interfaces of first d type flip flop pass through the first delay chip T1 connection voltage controllers
S_quench, the Q interfaces connection result of detection output unit of first d type flip flop.
Preferably, the active self feed back quenching circuit unit also includes biased reset control unit, the biased reset
Control unit includes the second d type flip flop and the second delay chip T2, and the S interfaces of second d type flip flop connect the first d type flip flop
/ Q interfaces, the R interfaces of second d type flip flop connect the second delay chip T2 one end, and the Q of second d type flip flop connects
Mouth passes through reset switch S_reset connections GND, the anode of the other end connection photon detector of the reset switch S_reset.
Preferably, the control circuit also includes temperature control circuit, and the temperature control circuit is TEC refrigeration drive circuit units,
The TEC refrigeration drive circuit unit connection single-photon detector.
The invention also discloses a kind of single photon detection of high speed self feed back to quench control method, including following step
Suddenly：
1) single-photon detector triggers：Single-photon detector when photon reaches, triggering avalanche, produces faint avalanche current
Pulse signal；
2) quenching control：After the filtered amplification of avalanche current pulse signal, comparator detects the voltage drop at Rs both ends, and
Exporting high level signal by the first d type flip flop closes voltage controller S_quench, and then makes single-photon detector anode
Terminal voltage be increased to V_q, reduce single-photon detector both ends pressure drops, snowslide is extinguished, and completes actively to quench；
3) control is resetted：First d type flip flop /Q interface output signals enter the second d type flip flop, the second d type flip flop is entered
Row triggering, the second d type flip flop output level pulse closes reset switch S_reset, and then makes single-photon detector anode
Terminal voltage drops to GND, before causing the pressure drop of single-photon detector both ends to return to snowslide, realizes biased reset control.
4) quench, reset control reset：Snowslide is extinguished, when the terminal voltage of single-photon detector anode returns to GND levels
When, voltage controller S_quench disconnects, and reset switch S_reset disconnects, and circuit is ready for photon detection next time；
5) signal output：First d type flip flop output signal enters result of detection output unit, by level conversion and tune
Section, the level signal LVDS/LVTTL of outputting standard, the measurement as photon counting and photon arrival time are used.
In the above method, the single-photon detector temperature control by TEC refrigeration drive circuit unit realize, make its be operated in-
40 DEG C of stable environment.
Compared with prior art, the utility model has following beneficial effect：
The single photon detection quenching control circuit of high speed self feed back of the present utility model, circuit is quenched using active self feed back
Unit carries out quenching control to the single-photon detector that snowslide triggers, and the quenching circuit and method can not only be in the extremely short times
Faint avalanche signal is inside accurately detected, while what can be exceedingly fast is quenched snowslide and resets, and the detection of single photon is greatly improved
Efficiency, the lengthy and jumbled degree of circuit system is also reduced to a certain extent, reduce the cost of system realization.
Brief description of the drawings
Fig. 1 is that the single photon detection of the utility model high speed self feed back quenches the theory diagram of control circuit.
In figure：Single-photon detector 100, bias voltage units 200, gating pulse unit 300, active self feed back quenching electricity
Road unit 400, filter amplifier 410, comparator 420, quench control unit 430, the first d type flip flop 431, the first delay chip
T1 432, result of detection output unit 440, biased reset control unit 450, the second d type flip flop 451, the second delay chip T2
452, temperature control circuit 500.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the utility model is clearly and completely described.
As shown in figure 1, a kind of single photon detection quenching control circuit of high speed self feed back, including single-photon detector 100,
Bias voltage units 200 and gating pulse unit 300, the single-photon detector 100 is using avalanche diode realization, monochromatic light
The negative electrode of sub- detector 100 is connected with bias voltage units 200, gating pulse unit 300 respectively, and the moon of single-photon detector
Pole is by resistance Rq connections bias voltage units 200, and resistance Rq is used for partial pressure, and the anode of single-photon detector 100 passes through resistance
Rs is grounded, and the control circuit also includes active self feed back quenching circuit unit 400, and the active self feed back quenches circuit unit
400 are connected to the anode of single-photon detector 100, and the active self feed back quenching circuit unit 400 includes filter amplifier
410th, comparator 420, quenching control unit 430 and result of detection output unit 440, the input of the filter amplifier 410
The anode of end connection single-photon detector 100, the output end of the filter amplifier 410 are sequentially connected comparator 420, quenching control
Unit 430 and result of detection output unit 440 processed, an output end of the quenching control unit 430, which is connected with, can make monochromatic light
The sub- anode terminal voltage of detector 100 rise causes the voltage controller S_quench that the snowslide of single-photon detector 100 is extinguished, the electricity
Pressure controller S_quench uses NMOS tube, and described voltage controller S_quench one end is connected with for balancing single photon detection
The power supply V_q of the bias voltage of device 100, the other end connection anode of single-photon detector 100.
The quenching control unit 430 includes the first d type flip flop 431 and the first delay chip T1 432, the first D
The S interfaces connection comparator 420 of trigger 431, the R interfaces of first d type flip flop 431 pass through the first delay chip T1 432
Connect voltage controller S_quench, the Q interfaces connection result of detection output unit 440 of first d type flip flop 431.
The active self feed back quenching circuit unit 400 also includes biased reset control unit 450, the biased reset control
Unit 450 processed includes the second d type flip flop 451 and the second delay chip T2 452, the S interfaces connection of second d type flip flop 451
First d type flip flop 431 /Q interfaces, the second delay chip T2 452 of R interfaces connection of second d type flip flop 451 one end,
The Q interfaces of second d type flip flop 451 are used by reset switch S_reset connections GND, the reset switch S_reset
PMOS, the anode of the other end connection photon detector 100 of the reset switch S_reset.
The control circuit also includes temperature control circuit 500, and the temperature control circuit 500 is that TEC freezes drive circuit unit, institute
State TEC refrigeration drive circuit unit connection single-photon detectors 100.
The circuit unit that the utility model is related to is as follows：
(1) filter amplifier 410：The main filtering and amplification for realizing avalanche diode snowslide initial signal, suppresses spike
Noise, effective avalanche signal is extracted, amplified using the two stage filter of LFCN575+ wave filters and ADA4960-1 amplifiers；
(2) comparator：The main effective quick examination for realizing avalanche signal, using high-speed comparator ADCM572, threshold value can
Adjust；
(3) control unit is quenched：It is main to realize that avalanche diode avalanche quenching controls, by detecting comparator output letter
Number, it is quick to suppress snowslide and be quenched.Using high speed d type flip flop SY55852, delay line chip DS1100, MC100EP series
ECL high-speed level conversion chips, the adjustable of 4ns-20ns can be achieved Automatic level control is quenched；
(4) biased reset control unit：It is main to realize that avalanche diode biased reset controls, by receiving that end letter is quenched
Number triggering, Rapid reset avalanche diode bias voltage, wait detect next time.Using high speed d type flip flop SY55852, prolong
When core piece DS1100, MC100EP series ECL high-speed level conversion chips, 4ns-20ns adjustable reset level can be achieved
Control；
(5) voltage controller S_quench and reset switch S_reset：The fast of level and reset level is quenched in main realize
Fast turn-on and turn-off.Using NMOS tube and PMOS, as controlling switch；
(6) result of detection output unit：The main fiduciary level signal for realizing output avalanche diode detection, as photon
Count and the measurement of photon arrival time is used.Using the ECL high-speed level conversion chips of MC100EP series, exportable LVDS
With two kinds of different standard signals of LVTTL.
The invention also discloses a kind of single photon detection of high speed self feed back to quench control method, including following step
Suddenly：
1) single-photon detector triggers：Single-photon detector when photon reaches, triggering avalanche, produces faint avalanche current
Pulse signal；
2) quenching control：After the filtered amplification of avalanche current pulse signal, comparator detects the voltage drop at Rs both ends, and
Exporting high level signal by the first d type flip flop closes voltage controller S_quench, and then makes single-photon detector anode
Terminal voltage be increased to V_q, reduce single-photon detector both ends pressure drops, snowslide is extinguished, and completes actively to quench；
3) control is resetted：First d type flip flop /Q interface output signals enter the second d type flip flop, the second d type flip flop is entered
Row triggering, the second d type flip flop output level pulse closes reset switch S_reset, and then makes single-photon detector anode
Terminal voltage drops to GND, before causing the pressure drop of single-photon detector both ends to return to snowslide, realizes biased reset control.
4) quench, reset control reset：Snowslide is extinguished, when the terminal voltage of single-photon detector anode returns to GND levels
When, voltage controller S_quench disconnects, and reset switch S_reset disconnects, and circuit is ready for photon detection next time；
5) signal output：First d type flip flop output signal enters result of detection output unit, by level conversion and tune
Section, the level signal LVDS/LVTTL of outputting standard, the measurement as photon counting and photon arrival time are used.
In the above method, the single-photon detector temperature control by TEC refrigeration drive circuit unit realize, make its be operated in-
40 DEG C of stable environment.
The embodiment of the utility model single photon detection quenching control method is as follows：
Avalanche diode is biased by a high direct voltage, and high direct voltage is generally greater than avalanche voltage；Avalanche diode temperature
Control is realized by TEC refrigeration drive circuit units, it is operated in -40 DEG C of stable environment；Gating pulse circuit realiration system is touched
Signal synchronous with input optical signal, for reducing the influence of dark counting.Filter amplifier realizes that the noise reduction of avalanche signal is put
Greatly.The circuit of first d type flip flop and delay chip T1 compositions completes the control of avalanche diode avalanche quenching, the second d type flip flop and
The circuit of delay chip T2 compositions completes the control of avalanche diode biased reset.
Avalanche diode one resistance Rq of series connection, at this moment avalanche diode is in the preparatory stage for detecting photon.When there is light
When son reaches, triggering avalanche, faint avalanche current pulse signal is produced.After filtered amplification, the comparator in feedback circuit
The voltage drop at resistance Rs both ends is promptly detected, and export high level signal by the first d type flip flop to make voltage controller S_
Quench is closed, and then the terminal voltage of avalanche diode anode is increased to V_q, generally 10V or so, causes avalanche diode
Both ends pressure drop is reduced, and snowslide is extinguished, it is achieved thereby that actively quenching.First d type flip flop exports trigger pulse and adjustable prolonged by one
When circuit carry out reset control, it is T1 to make its output level pulsewidth, so that operating voltage maintains extinguishing within a period of time
Level, it is achieved thereby that snowslide actively quenches.
Thereafter, the negative sense output signal (/Q) of the first d type flip flop enters the second d type flip flop, i.e., is touched immediately after avalanche quenching
The second d type flip flop is sent out, the level pulse that output width is T2 closes reset switch S_reset, and then makes avalanche diode positive
The terminal voltage of pole drops to GND, before causing the pressure drop of avalanche diode both ends to return to snowslide, realizes biased reset control, circuit
Get out photon detection next time.Snowslide is extinguished, finally, when the terminal voltage of avalanche diode anode returns to GND levels, electricity
Pressure controller S_quench disconnects, and reset switch S_reset disconnects, and circuit is ready for photon detection next time.
First d type flip flop output signal enters result of detection output unit, by level conversion and regulation, outputting standard
Level signal (LVDS/LVTTL), the measurement as photon counting and photon arrival time are used.
In above-mentioned active self feed back quenching circuit unit, T1 is avalanche diode avalanche quenching control time, and its value exists
4ns-20ns is adjustable, step-length 4ns；T2 is APD biased reset control times, and its value is adjustable in 4ns-20ns, step-length 4ns.
The trailing edge triggering T2 level of T1 level, it is only 400ps that it, which is delayed,.Understand, the time for completing a photon signal detection is T=
T1+T2+T0, T0 are that avalanche diode detector response time and device are delayed, and general total value is less than 2ns.Therefore, under this scheme
The single photon detection dead time is adjustable to minimum 10ns, and 100M counts/s high-speed counting can be achieved.
Comprehensive structure of the present utility model understands that the single photon detection of high speed self feed back of the present utility model quenches with principle
Control circuit, quenching control is carried out to the single-photon detector that snowslide triggers using active self feed back quenching circuit unit, this is quenched
Ignition circuit and method can not only accurately detect faint avalanche signal within the extremely short time, while what can be exceedingly fast is quenched snowslide simultaneously
Reset, the detection efficient of single photon is greatly improved, also reduce the lengthy and jumbled degree of circuit system to a certain extent, reduce
The cost that system is realized.
Claims (4)
1. a kind of high speed self feed back single photon detection quenching control circuit, including single-photon detector, bias voltage units with
And gating pulse unit, the negative electrode of single-photon detector is connected with bias voltage units, gating pulse unit respectively, and single photon
The negative electrode of detector is grounded by resistance Rq connection bias voltage units, the anode of single-photon detector by resistance Rs, and it is special
Sign is：The control circuit also includes active self feed back quenching circuit unit, and the active self feed back quenching circuit unit connects
The anode of single-photon detector is connected on, the active self feed back quenching circuit unit includes filter amplifier, comparator, quenching control
Unit and result of detection output unit processed, the anode of the input connection single-photon detector of the filter amplifier are described
The output end of filter amplifier is sequentially connected comparator, quenching control unit and result of detection output unit, the quenching control
One output end of unit processed, which is connected with, can make the rise of single-photon detector anode terminal voltage cause what single-photon detector snowslide was extinguished
Voltage controller S_quench, described voltage controller S_quench one end are connected with for balancing single-photon detector biased electrical
The power supply V_q of pressure, other end connection single-photon detector anode.
2. the single photon detection quenching control circuit of high speed self feed back as claimed in claim 1, it is characterised in that the quenching
Control unit includes the first d type flip flop and the first delay chip T1, the S interfaces connection comparator of first d type flip flop, institute
The R interfaces for stating the first d type flip flop pass through the first delay chip T1 connection voltage controllers S_quench, first d type flip flop
Q interfaces connection result of detection output unit.
3. the single photon detection quenching control circuit of high speed self feed back as claimed in claim 2, it is characterised in that the active
Self feed back quenching circuit unit also includes biased reset control unit, and the biased reset control unit includes the second d type flip flop
With the second delay chip T2, the S interfaces of second d type flip flop connect the first d type flip flop /Q interfaces, the 2nd D triggerings
The R interfaces of device connect the second delay chip T2 one end, and the Q interfaces of second d type flip flop are connected by reset switch S_reset
Connect GND, the anode of the other end connection photon detector of the reset switch S_reset.
4. the single photon detection quenching control circuit of high speed self feed back as claimed in claim 3, it is characterised in that the control
Circuit also includes temperature control circuit, and the temperature control circuit is that TEC freezes drive circuit unit, and the TEC freezes drive circuit unit
Connect single-photon detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720752109.XU CN206847792U (en) | 2017-06-27 | 2017-06-27 | A kind of single photon detection quenching control circuit of high speed self feed back |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720752109.XU CN206847792U (en) | 2017-06-27 | 2017-06-27 | A kind of single photon detection quenching control circuit of high speed self feed back |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206847792U true CN206847792U (en) | 2018-01-05 |
Family
ID=60802704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720752109.XU Withdrawn - After Issue CN206847792U (en) | 2017-06-27 | 2017-06-27 | A kind of single photon detection quenching control circuit of high speed self feed back |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206847792U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271058A (en) * | 2017-06-27 | 2017-10-20 | 浙江九州量子信息技术股份有限公司 | The single photon detection quenching control circuit and control method of a kind of high speed self feed back |
| CN114199390A (en) * | 2021-12-14 | 2022-03-18 | 中国电子科技集团公司第四十四研究所 | Single photon detection device capable of rapidly and actively quenching and actively restoring |
-
2017
- 2017-06-27 CN CN201720752109.XU patent/CN206847792U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271058A (en) * | 2017-06-27 | 2017-10-20 | 浙江九州量子信息技术股份有限公司 | The single photon detection quenching control circuit and control method of a kind of high speed self feed back |
| CN107271058B (en) * | 2017-06-27 | 2023-08-01 | 浙江九州量子信息技术股份有限公司 | High-speed self-feedback single photon detection quenching control circuit and control method |
| CN114199390A (en) * | 2021-12-14 | 2022-03-18 | 中国电子科技集团公司第四十四研究所 | Single photon detection device capable of rapidly and actively quenching and actively restoring |
| CN114199390B (en) * | 2021-12-14 | 2024-05-03 | 中国电子科技集团公司第四十四研究所 | Single photon detection device for rapid active quenching and active recovery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107271058A (en) | The single photon detection quenching control circuit and control method of a kind of high speed self feed back | |
| CN103148950B (en) | Integrated gating active quenching/restoring circuit | |
| CN107271036B (en) | The free-running operation single-photon detection system that high speed is quenched and restores | |
| CN102735351B (en) | Single-photon detector circuit and detection method thereof | |
| US8410416B2 (en) | Reduction of delay between subsequent capture operations of a light-detection device | |
| CN100458383C (en) | Method for collecting snowslide signal of APD single photon detector | |
| CN107167251A (en) | A kind of single-photon detector based on high frequency sinusoidal gate pulse pattern | |
| WO2008116292A1 (en) | Double quench circuit for an avalanche current device | |
| CN111351586B (en) | Integrated low-delay active quenching near-infrared single-photon detector | |
| CN108036861B (en) | A kind of single-photon detector of shared digital quantizer | |
| CN206847792U (en) | A kind of single photon detection quenching control circuit of high speed self feed back | |
| CN104198058A (en) | Quenching and reading circuit for single photon avalanche diode | |
| CN209069421U (en) | A kind of test device of single-photon detector | |
| CN114264383B (en) | High-efficiency single photon detection system and method applied to surface array up-conversion camera | |
| CN110274697A (en) | A kind of quick active quenching circuit applied to single-photon avalanche diode | |
| CN109443555B (en) | Single photon detection system based on active quenching active recovery circuit | |
| CN103487148B (en) | Single photon detection based on fast current induction suppresses circuit | |
| Tosi et al. | Single-photon detectors for practical quantum cryptography | |
| CN108709645B (en) | A kind of single photon quenching circuit based on field-effect tube | |
| CN107024289B (en) | Single photon detector with low time jitter | |
| CN207396767U (en) | Infrared tube detection device and system | |
| CN108426641B (en) | Photon counting circuit | |
| CN206259915U (en) | A kind of electrification reset circuit of low-power consumption small size | |
| CN110061727A (en) | / reset circuit and its method is quickly quenched in single photon avalanche diode detector | |
| CN215984859U (en) | Ultra-low noise single photon detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180105 Effective date of abandoning: 20230801 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180105 Effective date of abandoning: 20230801 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |