BASIC_TRACK_AND_HOLD_SAMPLE_AND_HOLD

Published:2009/7/9 23:09:00 Author:May | From:SeekIC

Feedback is the same as a conventional op-amp voltage follower which yields a unity-gain, noninverting output. This hookup also has a very high input impedance. The only difference between a track-and-hold and a sample-and-hold is the time period during which the switch is closed. In track-and-hold operation, the switch is closed for a relatively long period; the output signal might change appreciably and would hold the level present at the instant the switch is opened. In sample-and-ho1d operation, the switch is closed only for the time necessary to fully charge the holding capacitor.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Basic_Circuit/BASIC_TRACK_AND_HOLD_SAMPLE_AND_HOLD.html

Print this Page | Comments | Reading(3)