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Integrated sensor and range-finding analog signal processor

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3 Author(s)
Gruss, A. ; Carnegie Mellon Univ., Pittsburgh, PA, USA ; Carley, L.R. ; Kanade, T.

The authors present experimental results from an array of cells, each of which contains a photodiode and the analog signal-processing circuitry needed for light-stripe range finding. Prototype circuits were fabricated through MOSIS in a 2-μm CMOS p-well double-metal, double-poly process. This design builds on some of the ideas that have been developed for ICs that integrate signal-processing circuitry with photosensors. In the case of light-stripe range finding, the increase in cell complexity from sensing only to sensing and processing makes the modification of the operational principle of range finding practical, which in turn results in a dramatic improvement in performance. The IC array of photosensor and analog signal processor cells that acquires 1000 frames of light-stripe range data per second-two orders of magnitude faster than conventional light-stripe range-finding methods. The highly parallel range-finding algorithm used requires that the output of each photosensor site be continuously monitored. Prototype high-speed range-finding systems have been built using a 5×5 array and a 28×32 array of these sensing elements

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:26 ,  Issue: 3 )

Date of Publication:

Mar 1991

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