PULSE_TRIGGERED_MONO

Published:2009/7/2 0:33:00 Author:May | From:SeekIC

Combination of two ICs generates pulse having width precisely determined by external clock frequency and countdown factor N of 74C193 binary counter; time t in seconds is equal to N divided by frequency in hertz. With 74C193, 11 values of N are possible (1-6, 8-10, 12, and 16). With CD4013 14-stage counter, values of N can range from 1 to 24,576. Input pulse must be shorter than out-put pulse. Value of N depends on which two counter outputs are connected to two-input NAND gate.-R. L. Anderson, Digital One-Shot Produces Long, Accurate Pulses, EDN Magazine, March 5, 1978, p 127.



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