Wide Dynamic Range Snapshot APS for Ultra Low-Power Applications

Alexander Fish, Alexander Belenky, Orly Yadid-Pecht

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

A novel wide dynamic range (WDR) snapshot active pixel sensor for ultra-low power applications is presented. The proposed imager allows capturing of fast moving objects in the field of view and provides WDR by applying adaptive exposure time to each pixel, according to the local illumination intensity level. Driven by low-power dissipation requirements, the proposed pixel is operated by dual low voltage supplies (1.2 and 1.8 V) and utilizes an advanced low-power sensor design methodology. A test chip of a 32 * 32 array has been implemented in a standard 0.35-μm CMOS technology. A single pixel occupies 18 * 32 μm area and is expected to dissipate 18.5 nW at video rate. System architecture and operation are discussed and simulation results are presented.

Original languageEnglish
Pages (from-to)729-733
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume52
Issue number11
DOIs
StatePublished - 1 Jan 2005
Externally publishedYes

Keywords

  • Active pixel sensor (APS)
  • low-power sensor
  • snapshot CMOS imager
  • wide dynamic range (WDR) sensor

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