Browse Prior Art Database

DUTY CYCLE FEEDBACK LOOP CONTROL

IP.com Disclosure Number: IPCOM000007248D
Original Publication Date: 1994-Jun-01
Included in the Prior Art Database: 2002-Mar-07

Publishing Venue

Motorola

Related People

Authors:
Marc Osajda

Abstract

The purpose of this publication is to describe a signal conditioning which improves the duty cycle and period stability from a signal coming from a slotted opto switch used as a speed or position sen- sor under harsh environments (High temperature, oil, dust,. .) old voltage. The principle ofthe duty cycle feedback loop is to monitor the output signal duty cycle and then to change the threshold voltage automatically to obtain a 50% duty cycle regardless of the input signal wave form coming from the opto switch (or other technologies sensing elements).