AUTOMATIC_POLARITY_SWITCHING

Published:2009/7/15 20:37:00 Author:Jessie | From:SeekIC

Can be added to almost any high-impedance voltmeter to give automatic reversal of polarity as required during measurements. Additional contacts on relay can be used to switch polarity indicators. FET input prevents meter shunting. Feedback is used in opamp comparator to speed switching action.-H. Wedemeyer, Auto Polarity Switching for Voltmeters, Wireless World, Oct. 1974, p 380.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Measuring_and_Test_Circuit/AUTOMATIC_POLARITY_SWITCHING.html

Print this Page | Comments | Reading(3)