Browse Prior Art Database

Emitter Detect Circuit With Gain Compensation and Hysteresis

IP.com Disclosure Number: IPCOM000051796D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11

Publishing Venue

IBM

Related People

Authors:
Craig, TP Smith, LD Wells, TL [+details]

Abstract

Circuitry for use with an optical coupler in an emitter motion detector of the kind used in typewriters compensates for response variations among individual optical couplers and also provides a hysteresis effect so that slight reverse motion of the emitter wheel does not trigger a false pulse.