Image sensor comprising a plurality of photosensors and switches

Details Image sensor comprising a plurality of photosensors and switches Image sensor comprising a plurality of photosensors and switches

1985-02-07

1987-01-06

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358213, H01J 4014

Patent

active

046348832

ABSTRACT:
An image sensor for use in a solid-state facsimile transmitter includes a plurality of photosensors disposed in an array, each photosensor composed of a plurality of series-connected photodiodes; a voltage source; a plurality of switches for selectively applying a reverse bias from the voltage source to the photosensor array, each photosensor in the array being successively reverse biased by a corresponding one of the switches; and an output resistor for detecting current flowing through the selected reverse biased photosensor. The photosensors and switches may each comprise a plurality of series-connected photodiodes provided on a common substrate.

REFERENCES:
patent: 4479062 (1984-10-01), Kawasaki et al.

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