FREQUENCY_DOUBLING_TACHOMETER

Published:2009/7/1 5:35:00 Author:May | From:SeekIC

Connection shown for National LM2907 IC provides output pulse each time sine-wave input from magnetic pickup crosses zero, for use in digital control system. Width of each pulse is determined by size of C1 and supply voltage used.Circuit serves for doubling frequency presented to microprocessor control system.- Linear Applications, Vol. 2, National Semiconductor, Santa Clara, CA, 1976, AN-162, p12-13.



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