An improved AB2C scheme for leakage power reduction in image sensors with on-chip memory

Adam Teman, Orly Yadid-Pecht, Alexander Fish

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Static leakage power is the major component of power consumption in large arrays that operate at a low activity factor. "Smart" image sensors with advanced in-pixel functionality frequently include large on-chip memory arrays for storage of per-pixel data. These systems periodically transfer data from pixels to their corresponding memory bits in a serial access scheme with a relatively low activity factor. Recently, an Adaptive Bulk Biasing Control (AB2C) Scheme for leakage reduction in image sensors was presented. In this paper, we introduce an improved AB2C scheme that expands the functionality for on-chip memory leakage reduction, in addition to that of the image sensor. In the proposed system, a symmetric voltage distribution is applied around the active row, providing reverse body biasing on deactivated rows to reduce leakage. A test case circuit was implemented in a standard 90nm TSMC process is presented, showing a static power reduction of 26%.

Original languageEnglish
Title of host publicationIEEE Sensors 2009 Conference - SENSORS 2009
Pages193-196
Number of pages4
DOIs
StatePublished - 1 Dec 2009
EventIEEE Sensors 2009 Conference - SENSORS 2009 - Christchurch, New Zealand
Duration: 25 Oct 200928 Oct 2009

Publication series

NameProceedings of IEEE Sensors

Conference

ConferenceIEEE Sensors 2009 Conference - SENSORS 2009
Country/TerritoryNew Zealand
CityChristchurch
Period25/10/0928/10/09

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