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Proceedings Paper

Design and analysis of an analog signal readout circuit for SPAD
Author(s): Xiang-Liang Jin; Duo-Duo Zeng; Hong-Jiao Yang; Yang Wang; Jun Luo
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Paper Abstract

-In this paper, an ultralow and high speed photocurrent analog signal readout circuit in order to amplify and process the output of SPAD(single-photon avalanche diodes) photocurrent is presented. The four main parts of the ASIC are low temperature coefficient(7.85ppm/°C) bandgap reference circuit, high linearity and high common-mode rejection ratio(120.6dB) operational amplifier, filter circuit and low-delay(63ns/1MHZ) comparator circuit. The SPAD readout chip is fabricated in a standard 0.5um CMOS process and size of 672um*780um. The simulation results indicate the chip successfully amplifies and processes 80nA and 1MHZ photocurrent analog signal. The circuit is fit for processing fleetness change and faint signal in CMOS image sensor of acquisition technology.

Paper Details

Date Published: 12 December 2018
PDF: 6 pages
Proc. SPIE 10845, Three-Dimensional Image Acquisition and Display Technology and Applications, 108450E (12 December 2018); doi: 10.1117/12.2505035
Show Author Affiliations
Xiang-Liang Jin, Xiangtan Univ. (China)
Duo-Duo Zeng, Xiangtan Univ. (China)
Hong-Jiao Yang, Xiangtan Univ. (China)
Yang Wang, Xiangtan Univ. (China)
Jun Luo, Shanghai Univ. (China)

Published in SPIE Proceedings Vol. 10845:
Three-Dimensional Image Acquisition and Display Technology and Applications
Byoungho Lee; Yongtian Wang; Liangcai Cao; Guohai Situ, Editor(s)

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