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4 December 2020 A 32×32 SPAD array based readout integrated circuit for LiDAR applications
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Proceedings Volume 11617, International Conference on Optoelectronic and Microelectronic Technology and Application; 116172O (2020) https://doi.org/10.1117/12.2585367
Event: International Conference on Optoelectronic and Microelectronic Technology and Application, 2020, Nanjing, China
Abstract
This paper presents a readout integrated circuit (ROIC) for 32×32 single photon avalanche diode (SPAD) array. The ROIC integrates 32×32 active quenching circuit and time-to-digital converter (TDC) circuit. Each ROIC unit has a novel active quenching circuit (AQC) and an in-pixel TDC. The ROIC and the detectors are integrated by Flip-Chip .The novel quenching circuit with active reset function is proposed to reduce the dead time. A dual-counter-based TDC is designed to prevent the metastability of the counter. The sensor is fabricated in 180-nm CMOS BCD technology. The simulation results show the novel active quenching circuit effectively reduces the dead time down to 10 ns. The 13bit-TDC helps the system achieve centimeter-accuracy detection.
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jing Cao, Xiaoyan Hu, Lijun Yang, and Bin Li "A 32×32 SPAD array based readout integrated circuit for LiDAR applications", Proc. SPIE 11617, International Conference on Optoelectronic and Microelectronic Technology and Application, 116172O (4 December 2020); https://doi.org/10.1117/12.2585367
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