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Proceedings Paper

On Focal Plane Charge-Coupled Device (CCD) Signal Processing Circuits
Author(s): W. E. Jensen
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Paper Abstract

On Chip CCD Signal Processing Circuits are presented which enhance Focal Plane performance in scanned imaging systems. A Charge Input Mode Programmable Signal CHIMPS Compressor increases dynamic range by providing programmable signal amplitude compression at the detector. Compression breakpoint and ratio are determined by clocking waveforms. A CCD Multiplier provides Automatic Responsivity Control ARC to reduce TDI column to column responsivity non-uniformities. A GAMMA - APERTURE circuit provides two functions: (1) high frequency boost to compensate for losses due to scanning of detector apertures, and (2) a scene processing gamma function which attenuates high level, low frequency signals. This circuit provides increased useable dynamic range when observing scene detail contained in large scene areas which have large differences in amplitude.

Paper Details

Date Published: 7 May 1980
PDF: 13 pages
Proc. SPIE 0217, Advances in Focal Plane Technology, (7 May 1980); doi: 10.1117/12.958476
Show Author Affiliations
W. E. Jensen, Hughes Aircraft Company (United States)

Published in SPIE Proceedings Vol. 0217:
Advances in Focal Plane Technology
William S. Chan, Editor(s)

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