Pulse time compression method for multichannel single-photon avalanche diode detector

• Main Authors: ZHANG LIMIN, BU XIAOFENG, KONG XIANGSHUN, YAN FENG, MAO CHENG
• Format: Patent
• Language: Chinese; English
• Published: 14.06.2019
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention discloses a pulse time compression method for a multichannel single-photon avalanche diode detector. The method comprises the specific steps that multiple single-photon avalanche diodesform a detection array, all the single-photon avalanche diodes are independent, and a quenching circuit of each single-photon avalanche diode is connected with a pulse time compression circuit; each single-photon avalanche diode generates a wide-pulse signal under the action of the corresponding quenching circuit, and each wide-pulse signal is subject to pulse time compression through the corresponding pulse time compression circuit to generate a narrow-pulse signal; and a bus circuit merges the multiple narrow-pulse signals, obtained after pulse time compression, onto one bus, and the mergedsignals serve as one pixel point to be output externally. Through the method, the problems of signal indistinguishability, signal judgment omission and misjudgment caused by the situation that each channel in dead time of the