A 64×64 APD-Based ToF Image Sensor with Background Light Suppression up to 200 klx Using In-Pixel Auto-Zeroing and Chopping

Byungchoul Park, Injun Park, Woojun Choi, Youngcheol Chae

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

This paper presents a time-of-flight (ToF) image sensor for outdoor applications. The sensor employs a gain-modulated avalanche photodiode (APD) that achieves high modulation frequency. The suppression capability of background light is greatly improved up to 200klx by using a combination of in pixel auto-zeroing and chopping. A64 × 64 APD-based ToF sensor is fabricated in a0.11 μ m CMOS. It achieves depth ranges from 0.5 to 2 m with 25MHz modulation and from 2 to 20 m with 1.56MHz modulation. For both ranges, it achieves a non-linearity below 0.8% and a precision below 3.4% at a 3D frame rate of 96fps.

Original languageEnglish
Title of host publication2019 Symposium on VLSI Circuits, VLSI Circuits 2019 - Digest of Technical Papers
PublisherInstitute of Electrical and Electronics Engineers Inc.
PagesC256-C257
ISBN (Electronic)9784863487185
DOIs
Publication statusPublished - 2019 Jun
Event33rd Symposium on VLSI Circuits, VLSI Circuits 2019 - Kyoto, Japan
Duration: 2019 Jun 92019 Jun 14

Publication series

NameIEEE Symposium on VLSI Circuits, Digest of Technical Papers
Volume2019-June

Conference

Conference33rd Symposium on VLSI Circuits, VLSI Circuits 2019
CountryJapan
CityKyoto
Period19/6/919/6/14

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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