On Focal Plane Charge-Coupled Device (CCD) Signal Processing Circuits

W. E. Jensen

doi:10.1117/12.958476

7 May 1980 On Focal Plane Charge-Coupled Device (CCD) Signal Processing Circuits

W. E. Jensen

Proceedings Volume 0217, Advances in Focal Plane Technology; (1980) https://doi.org/10.1117/12.958476
Event: 1980 Los Angeles Technical Symposium, 1980, Los Angeles, United States

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.

Citation Download Citation

W. E. Jensen "On Focal Plane Charge-Coupled Device (CCD) Signal Processing Circuits", Proc. SPIE 0217, Advances in Focal Plane Technology, (7 May 1980); https://doi.org/10.1117/12.958476

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