PULSE_RATIO_MODULATOR

Published:2009/7/6 22:01:00 Author:May | From:SeekIC

LM111 comparator serves with single transistor to provide pulse-train output whose average value is proportional to input voltage. Frequency of output is relatively constant but pulse width varies .Pulse-ratio accuracy is 0.1%. Circuit can be used to drive power stage of high-efficiency switching amplifier, or as pulse-width/pulse-height multiplier. Article tells how circuit works.-R.C. Dobkin, Comparators Can Do More than Just Compare, EDN Magazine, Nov. 1, 1972, p34-37.



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