A 2d-Spad Array And Read-Out Afe For Next-Generation Solid-State Lidar

Tuan Thanh Ta,Hiroshi Kubota, Koichi Kokubun,Toshiki Sugimoto,Masatoshi Hirono, Mitsuhiro Sengoku,Hisaaki Katagiri,Hidenori Okuni,Satoshi Kondo,Shinichi Ohtsuka,Honam Kwon,Keita Sasaki,Yutaka Ota,Kazuhiro Suzuki,Katsuyuki Kimura,Kentaro Yoshioka,Akihide Sai,Nobu Matsumoto

2020 IEEE SYMPOSIUM ON VLSI CIRCUITS（2020）

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摘要

This paper introduces several key RX techniques to realize a 200m-range and low-cost high-pixel-resolution solid-state LiDAR for autonomous self-driving systems. In-Sensor Scanning 2D-SPAD array can remove the mechanical mirror and improve the pixel-resolution by implying short dead time active-quenching SPADs. For ToF calculating SoC, we adopt the world first dual-data converter (DDC) which consolidates the functions of ADC and TDC into a single circuitry, achieving the acquisition of both high-precision time/voltage data from a single input. Such innovations lead us to 200m-range 300x80-pixel solid-state LiDAR RX under 70klux solar radiation.

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关键词

next-generation solid-state LiDAR,autonomous self-driving systems,dual-data converter,solid-state LiDAR RX,RX techniques,in-sensor scanning 2D-SPAD array,short dead time active-quenching SPAD,mechanical mirror,ToF SoC calculation,DDC,readout AFE,ADC,TDC,high-precision time-voltage data acquisition

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