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Proceedings Paper

Digital pixel CMOS focal plane array with on-chip multiply accumulate units for low-latency image processing
Author(s): Jeffrey W. Little; Brian M. Tyrrell; Richard D'Onofrio; Paul J. Berger; Christy Fernandez-Cull
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Paper Abstract

A digital pixel CMOS focal plane array has been developed to enable low latency implementations of image processing systems such as centroid trackers, Shack-Hartman wavefront sensors, and Fitts correlation trackers through the use of in-pixel digital signal processing (DSP) and generic parallel pipelined multiply accumulate (MAC) units. Light intensity digitization occurs at the pixel level, enabling in-pixel DSP and noiseless data transfer from the pixel array to the peripheral processing units. The pipelined processing of row and column image data prior to off chip readout reduces the required output bandwidth of the image sensor, thus reducing the latency of computations necessary to implement various image processing systems. Data volume reductions of over 80% lead to sub 10μs latency for completing various tracking and sensor algorithms. This paper details the architecture of the pixel-processing imager (PPI) and presents some initial results from a prototype device fabricated in a standard 65nm CMOS process hybridized to a commercial off-the-shelf short-wave infrared (SWIR) detector array.

Paper Details

Date Published: 24 June 2014
PDF: 8 pages
Proc. SPIE 9070, Infrared Technology and Applications XL, 90703B (24 June 2014); doi: 10.1117/12.2057519
Show Author Affiliations
Jeffrey W. Little, MIT Lincoln Lab. (United States)
Brian M. Tyrrell, MIT Lincoln Lab. (United States)
Richard D'Onofrio, MIT Lincoln Lab. (United States)
Paul J. Berger, MIT Lincoln Lab. (United States)
Christy Fernandez-Cull, MIT Lincoln Lab. (United States)

Published in SPIE Proceedings Vol. 9070:
Infrared Technology and Applications XL
Bjørn F. Andresen; Gabor F. Fulop; Charles M. Hanson; Paul R. Norton, Editor(s)

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