A linear response 200-dB dynamic range CMOS image sensor with multiple voltage and current readout operations

Noriko Ide, Nana Akahane, Shigetoshi Sugawa

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

6 Citations (Scopus)

Abstract

Operation methods for high frame rate, linear response, wide dynamic range (DR) and high SNR in a CMOS image sensor are discussed. The high frame rate operation is realized by the optimum design of the floating diffusion capacitor, the lateral overflow integration capacitor, the column integration capacitor and the integration periods of multiple voltage and current readout operations. The color CMOS image sensor which consists of the 1/3-inch, 800H × 600V pixels and 5.6-μm pixel pitch with a buried pinned-photodiode, a transfer switch, a reset switch, a lateral overflow switch, a lateral overflow integration capacitor, a photocurrent readout switch, a source follower transistor and a pixel select switch in each pixel has been fabricated by 0.18-μm 2P3M CMOS technology. The image sensor operates the total frame rate of 13-fps with three-time voltage readout operations and one current readout operation and have realized full linear photoelectric conversion responses, over 20-dB SNR for the image of the 18-% gray card at all integration operation switching points and the over 200-dB DR.

Original languageEnglish
Title of host publicationProceedings of SPIE-IS and T Electronic Imaging - Sensors, Cameras, and Systems for Industrial/Scientific Applications IX
DOIs
Publication statusPublished - 2008 May 19
EventSensors, Cameras, and Systems for Industrial/Scientific Applications IX - San Jose, CA, United States
Duration: 2008 Jan 292008 Jan 31

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6816
ISSN (Print)0277-786X

Other

OtherSensors, Cameras, and Systems for Industrial/Scientific Applications IX
CountryUnited States
CitySan Jose, CA
Period08/1/2908/1/31

Keywords

  • CMOS image sensor
  • High SNR
  • High frame rate
  • Linear response
  • Wide dynamic range

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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