A digital CMOS imager with pixel level analog-to-digital converter and reconfigurable SRAM/counter

Yat Fong Yung, Amine Bermak

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

Abstract

In this paper a CMOS image sensor with on-pixel analog-to-digital convener based on PWM scheme is proposed. The digital pixel sensor includes a novel digital circuit which allows to configure the internal 8-bit memory as a 4-bit counter/memory, so as to reduce the data bit lines routed to each pixel from 8-bit to 4-bit. Hence the total parasitic capacitance as well as power consumption associated with the switching activities of the global data bus lines are reduced. Besides 8-bit precision, the imager can also be configured to 4-bit precision for low resolution applications, which has the advantage of increasing frame rate and decreasing overall power consumption. A prototype chip was realized in Alcatel 0.35μm CMOS technology. Each pixel occupies an area of 46μm × 48μm with a fill-factor of 14%.

Original languageEnglish
Title of host publicationProceedings - 4th IEEE International Workshop on System-on-Chip for Real-Time Applications, IWSOC 2004
EditorsW. Badawy, Y. Ismail
Pages33-36
Number of pages4
Publication statusPublished - 27 Dec 2004
EventProceedings - 4th IEEE International Workshop on System-on-Chip for Real-Time Applications, IWSOC 2004 - Banff, Alta, Canada
Duration: 19 Jul 200421 Jul 2004

Publication series

NameProceedings - 4th IEEE International Workshop on System-on-Chip for Real-Time Applications, IWSOC 2004

Other

OtherProceedings - 4th IEEE International Workshop on System-on-Chip for Real-Time Applications, IWSOC 2004
CountryCanada
CityBanff, Alta
Period19/7/0421/7/04

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Yung, Y. F., & Bermak, A. (2004). A digital CMOS imager with pixel level analog-to-digital converter and reconfigurable SRAM/counter. In W. Badawy, & Y. Ismail (Eds.), Proceedings - 4th IEEE International Workshop on System-on-Chip for Real-Time Applications, IWSOC 2004 (pp. 33-36). (Proceedings - 4th IEEE International Workshop on System-on-Chip for Real-Time Applications, IWSOC 2004).