A pipelined temporal difference imager

Viktor Gruev, Ralph Etienne-Cummings

Research output: Contribution to journalArticlepeer-review


A 189 × 182 Active Pixel Sensor (APS) for temporal difference computation is presented. The temporal difference imager (TDI), fabricated in AMI 0.5μ process, contains in-pixel storage elements for previous and current frames. A correlated double sampling circuit is used to suppress the fixed pattern noise on both images and direct difference on the corrected images is also computed. The pixel area occupies 25μ by 25μ, with fill factor of 30%. An efficient pipeline architecture for difference readout is implemented, allowing 8 bit precision of the difference imager and low temporal drop between the stored and current images. The chip consumes 30mW at 50 fps from 5V power supply.

Original languageEnglish (US)
JournalProceedings - IEEE International Symposium on Circuits and Systems
StatePublished - 2002
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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