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Integrated Three Terminal Led Photodetector

IP.com Disclosure Number: IPCOM000045849D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07

Publishing Venue

IBM

Related People

Authors:
Matino, H [+details]

Abstract

This article describes an integrated three-terminal light-emitting/photodetecting array structure in which a light-emitting junction is formed in a gate region of the FET-type photodetecting device. The structure does not require a sense amplifier since the structure produces an output signal level which is compatible with the logic circuit, such as TTL (transistor-transistor logic). The structure is particularly adaptable to a print/photodetector head for a facsimile terminal in which the head is used for both recording an image on a recording medium and reading or sensing an image or mark on the medium.