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

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

Fingerprint

Avalanche photodiodes
Image sensors
Pixels
Modulation
Sensors
Frequency modulation

All Science Journal Classification (ASJC) codes

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

Cite this

Park, B., Park, I., Choi, W., & Chae, Y. (2019). A 64×64 APD-Based ToF Image Sensor with Background Light Suppression up to 200 klx Using In-Pixel Auto-Zeroing and Chopping. In 2019 Symposium on VLSI Circuits, VLSI Circuits 2019 - Digest of Technical Papers (pp. C256-C257). [8778015] (IEEE Symposium on VLSI Circuits, Digest of Technical Papers; Vol. 2019-June). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.23919/VLSIC.2019.8778015
Park, Byungchoul ; Park, Injun ; Choi, Woojun ; Chae, Youngcheol. / A 64×64 APD-Based ToF Image Sensor with Background Light Suppression up to 200 klx Using In-Pixel Auto-Zeroing and Chopping. 2019 Symposium on VLSI Circuits, VLSI Circuits 2019 - Digest of Technical Papers. Institute of Electrical and Electronics Engineers Inc., 2019. pp. C256-C257 (IEEE Symposium on VLSI Circuits, Digest of Technical Papers).
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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.",
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Park, B, Park, I, Choi, W & Chae, Y 2019, A 64×64 APD-Based ToF Image Sensor with Background Light Suppression up to 200 klx Using In-Pixel Auto-Zeroing and Chopping. in 2019 Symposium on VLSI Circuits, VLSI Circuits 2019 - Digest of Technical Papers., 8778015, IEEE Symposium on VLSI Circuits, Digest of Technical Papers, vol. 2019-June, Institute of Electrical and Electronics Engineers Inc., pp. C256-C257, 33rd Symposium on VLSI Circuits, VLSI Circuits 2019, Kyoto, Japan, 19/6/9. https://doi.org/10.23919/VLSIC.2019.8778015

A 64×64 APD-Based ToF Image Sensor with Background Light Suppression up to 200 klx Using In-Pixel Auto-Zeroing and Chopping. / Park, Byungchoul; Park, Injun; Choi, Woojun; Chae, Youngcheol.

2019 Symposium on VLSI Circuits, VLSI Circuits 2019 - Digest of Technical Papers. Institute of Electrical and Electronics Engineers Inc., 2019. p. C256-C257 8778015 (IEEE Symposium on VLSI Circuits, Digest of Technical Papers; Vol. 2019-June).

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

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Park B, Park I, Choi W, Chae Y. A 64×64 APD-Based ToF Image Sensor with Background Light Suppression up to 200 klx Using In-Pixel Auto-Zeroing and Chopping. In 2019 Symposium on VLSI Circuits, VLSI Circuits 2019 - Digest of Technical Papers. Institute of Electrical and Electronics Engineers Inc. 2019. p. C256-C257. 8778015. (IEEE Symposium on VLSI Circuits, Digest of Technical Papers). https://doi.org/10.23919/VLSIC.2019.8778015