Design of 128×32 GM-APD array ROIC with multi-echo detection for single photon 3D LiDAR

Wangshuai Xu; Shaowei Zhen; Hailiang Xiong; Bingqing Zhao; Ziyi Liu; Yourun Zhang; Zungui Ke; Bo Zhang

doi:10.1117/12.2586921

12 March 2021 Design of 128×32 GM-APD array ROIC with multi-echo detection for single photon 3D LiDAR

Wangshuai Xu, Shaowei Zhen, Hailiang Xiong, Bingqing Zhao, Ziyi Liu, Yourun Zhang, Zungui Ke, Bo Zhang

Proceedings Volume 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications; 117634A (2021) https://doi.org/10.1117/12.2586921
Event: Seventh Symposium on Novel Photoelectronic Detection Technology and Application 2020, 2020, Kunming, China

Abstract

Single photon flash light detection and ranging (LiDAR), which is based on Geiger Mode avalanche photodiode (GMAPD) array, enables superior sensitivity and detection range to obtaining depth information. The Flash LiDAR captures an entire 3D image by single laser pulse, much faster than conventional LiDAR based on the scanning of a single detector over the scene. In conventional advanced driver assistant systems (ADAS), closer and weaker reflections caused by the environmental factors will cause misidentification. Furthermore, power dissipation and limited pixel size are enormous challenges for Readout Integrated Circuit (ROIC) design. The paper proposes the design of ROIC with Multi-Echo Detection for 128×32 GM-APD Array. The pixel includes active quenching and reset circuit of GM-APD, and embedded 11-bit Time to Digital Converter (TDC) offers precise distance resolution by Time of Flight (TOF) measurement. The proposed ROIC is designed with 0.18μm CMOS process. Due to shared DFFs by TDC and shift register, 90μm pixel pitch is realized with Multi-Echo Detection function. Global clock gating(GCG) and shift clock gating(SCG) techniques bring the power dissipation down to 464.6mW.

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Wangshuai Xu, Shaowei Zhen, Hailiang Xiong, Bingqing Zhao, Ziyi Liu, Yourun Zhang, Zungui Ke, and Bo Zhang "Design of 128×32 GM-APD array ROIC with multi-echo detection for single photon 3D LiDAR", Proc. SPIE 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications, 117634A (12 March 2021); https://doi.org/10.1117/12.2586921

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