TEMPERATURE_COMPENSATED_LOG_CONVERTER

Published:2009/7/13 22:50:00 Author:May | From:SeekIC

Two opamps and two logging transistors give output proportional to logarithm of input with high degree of temperature compensation. Article gives design equations and application instructions. Circuit is for positive inputs; for negative inputs, use PNP transistors such as 2N4058 in place of those shown.-G. B Clayton, Experiments with Operational Amplifiers, Wireless World, Jan. 1973, p 33-35.



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