SCHMITT_TRIGGER_AS_TIME_PROPORTIONING_TEMPERATURE_CONTROL

Published:2009/7/21 20:30:00 Author:Jessie | From:SeekIC

Hysteresis of Schmitt trigger (difference between turn-on und turnoff signal levels) is adjusted with negative feedback instead of positive, lo reduce hysteresis to less than 1 my. Trigger point can be adjusted above or below ground reference despite use of only one power supply. Modification of negative feedback causes dutycycle-controllable oscillation. Potentiometer adjusts circuit gain smoothly over wide range. -P. Lefferts, 'Super' Schmitt Uses Negative Feedback, EEE, 12:12, p 52-53.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/SCHMITT_TRIGGER_AS_TIME_PROPORTIONING_TEMPERATURE_CONTROL.html

Print this Page | Comments | Reading(3)