PULSE_DELAY_WITH_DUAL_EDGE_TRIGGER

Published:2009/7/7 8:44:00 Author:May | From:SeekIC

A single monostable multivibrator delays a pulse train by a variable amount; nonetheless, this amount can be no less than the minimum allowed pulse width tw The exclusive-OR gate, IC1, generates a short pulse following every leading or falling edge of the input waveform. These pulses cause one-shot IC2 to produce a negative-going pulse with a duration equal to the desired time delay tp which you set by adjusting potentiometer R. Flip-flop IC3 then creates a delayed replica of the input pulse by latching the Q1 out-put of IC2 between positive-going transitions. You can independently control the output-pulse duration by cascading a second one shot with the first.



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