An Automotive LiDAR SoC for 240 × 192-Pixel 225-m-Range Imaging With a 40-Channel 0.0036-mm2 Voltage/Time Dual-Data-Converter-Based AFE

Satoshi Kondo; Hiroshi Kubota; Hisaaki KatagiriYutaka OtaMasatoshi HironoTuan Thanh TaHidenori OkuniShinichi OhtsukaYoshinari OjimaTomohiko SugimotoHirotomo IshiiKentaro YoshiokaKatsuyuki KimuraAkihide SaiNobu Matsumoto

首页> 外文期刊>IEEE Journal of Solid-State Circuits >An Automotive LiDAR SoC for 240 × 192-Pixel 225-m-Range Imaging With a 40-Channel 0.0036-mm2 Voltage/Time Dual-Data-Converter-Based AFE

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An Automotive LiDAR SoC for 240 × 192-Pixel 225-m-Range Imaging With a 40-Channel 0.0036-mm2 Voltage/Time Dual-Data-Converter-Based AFE

机译：An Automotive LiDAR SoC for 240 × 192-Pixel 225-m-Range Imaging With a 40-Channel 0.0036-mm2 Voltage/Time Dual-Data-Converter-Based AFE

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This article presents a 40-channel high-resolution automotive LiDAR system-on-chip (SoC), which utilizes the world’s first dual-data converter (DDC). The proposed DDC consolidates the functions of ADC and TDC into a single circuitry and achieves acquisition of both high-precision time and voltage data from the input, realizing a 5inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" tex-math notation="LaTeX"$times $ /tex-math/inline-formula smaller analog front-end (AFE) area than prior arts. Such innovations lead us to a 40-channel AFE integration of the SoC without silicon cost increase, which characterizes our LiDAR system with 2inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" tex-math notation="LaTeX"$times $ /tex-math/inline-formula higher pixel resolution. To enhance the ADC’s signal-to-noise and distortion ratio (SNDR) without sacrificing the area efficiency, a calibration-free and variation-tolerant voltage-controlled oscillator (VCO)-based ADC with a multiphase pulse density modulator (MP-PDM)-based feedback is proposed. Our proof-of-concept LiDAR system achieves a measurement range of 225 m at 70-klx direct sunlight, with a resolution of 240 inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" tex-math notation="LaTeX"$times $ /tex-math/inline-formula 192 pixels at 10 frames per second (FPS). To quantitatively measure the effect of the resolution improvement of our LiDAR, we evaluate the LiDAR’s detection accuracy of small targets 75 m away. Due to the 2inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" tex-math notation="LaTeX"$times $ /tex-math/inline-formula higher vertical pixel resolution, our LiDAR can detect targets with 2inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" tex-math notation="LaTeX"$times $ /tex-math/inline-formula smaller height. The 3-D point cloud of the LiDAR captured outdoor in the wild is presented.

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《IEEE Journal of Solid-State Circuits》 |2020年第11期|2866-2877|共12页
作者
Satoshi Kondo; Hiroshi Kubota; Hisaaki KatagiriYutaka OtaMasatoshi HironoTuan Thanh TaHidenori OkuniShinichi OhtsukaYoshinari OjimaTomohiko SugimotoHirotomo IshiiKentaro YoshiokaKatsuyuki KimuraAkihide SaiNobu Matsumoto;
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作者单位

Toshiba Corporation, Kawasaki, Japan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类基本电子电路;
关键词
Laser radar; Voltage-controlled oscillators; Frequency modulation; Image resolution; Time-frequency analysis; Timing;

An Automotive LiDAR SoC for 240 × 192-Pixel 225-m-Range Imaging With a 40-Channel 0.0036-mm2 Voltage/Time Dual-Data-Converter-Based AFE

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