Quenching reset circuit for single photon avalanche diode detector

A single-photon avalanche and reset circuit technology, applied in the field of single-photon detection, can solve the problems of easy failure in the quenching process, and achieve the effects of easy handling, steep output pulse and high reliability
CN106712752AActive Publication Date: 2017-05-24NANJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV OF POSTS & TELECOMM
Publication Date
2017-05-24

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Abstract

The invention discloses a quenching reset circuit for a single photon avalanche diode detector. The reset circuit comprises three parts such as a quenching circuit, a reset circuit and an avalanche signal output portion, and is characterized in that the quenching circuit is composed of five MOS transistors, and the five MOS transistors form a positive feedback circuit for voltage variations of a node a; the reset circuit is composed of 17 MOS transistors; and the avalanche signal output portion is composed of eight MOS transistors. The advantages are that the quenching reset circuit is high in reliability, and a reset operation is ensured to be performed after avalanche current generated by the SPAD (Single Photon Avalanche Diode) detector is sufficiently quenched because of adoption of a Schmitt trigger with high threshold level. In addition, the waveform quality of avalanche pulses generated by the circuit is high, avalanche signals are converted into narrow pulses through a NOR gate, and then the narrow pulses are shaped by a two-stage inverter and act as final output avalanche pulses, so that the output pulses are enabled to be steeper, and processing of a counting circuit is facilitated.
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Description

technical field

[0001] The invention provides a highly reliable quenching reset circuit and method for a single-photon avalanche photodiode detector, belonging to the technical field of single-photon detection. Background technique

[0002] SPAD (Single Photon Avalanche Diode) is a single photon avalanche photodiode. In the field of photodetection, the photomultiplier tube (PMT) in the traditional sense can no longer satisfy the detection under high-speed and low-light conditions. Traditional imaging technology is limited in terms of imaging speed and pixel sensitivity, so solid-state photomultipliers began to appear. tube, the single photon avalanche diode detector. In recent years, using the current standard CMOS process to manufacture high-density, highly integrated SPAD array detectors has become the development trend of this single-photon avalanche diode detector.

[0003] A SPAD pixel unit contains two circuits, one is a quenching reset circuit, and the other is a co...

Claims

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