Browse Prior Art Database

Automatic LED/Phototransistor Calibration Circuit

IP.com Disclosure Number: IPCOM000067381D
Original Publication Date: 1979-Jul-01
Included in the Prior Art Database: 2005-Feb-20

Publishing Venue

IBM

Related People

Authors:
Beirne, JM Boothroyd, WA [+details]

Abstract

This article describes an apparatus using a microprogrammed controller for adjusting photo-emitter intensity to compensate for mechanical and environmental tolerances. Such an apparatus has application, for example, in a device for detecting multiple feed errors (such as double thickness documents) in the currency transport of an automatic banking terminal or cash issuer.