PULSE_WIDTH_DETECTOR

Published:2009/7/2 5:27:00 Author:May | From:SeekIC

Logic terminal of National LM122 timer is driven simultaneously with trigger input to give high-accuracy pulsewidth detector. Output changes state onlv when trigger input stays high for longer than time period set by Rt and Ct; resulting output pulse width is then equal to input trigger width minus RtCt. CL filters out narrow spikes that would occur at output due to interval delays during switching. Supply can range from 4.5 to 4O V.-C. Nelson, Versatile Timer Operates from Microseconds to Hours, National Semi-conductor, Santa Clara, CA, 1973, AN-97, p 9.



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