VOLTAGE_RATIO_METER

Published:2009/7/24 1:45:00 Author:Jessie | From:SeekIC

Simple circuit, having resolution better than 0.1% for measuring ratio of two voltages, also serves as accurate null detector when difference voltage is less than 0.5 v. A 115-v, 6-w lamp limits voltage applied to meter when differance voltage exceeds 0.5 v. R2 is chosen to give full-scale defection when difference between the two voltages is maximum.-P. A. Lenk, Circuit Permits Accurate Voltage Ratio Measurements, Electronics, 34:52, p 56-57.



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