SLEW_RATE

Published:2009/6/29 2:01:00 Author:May | From:SeekIC

Circuit measures slew rate of input signal with Am685 comparator in circuit having delay-line length under 10 ns. When slew rate exceeds predetermined Iimit set by R6, comparator changes state and latches, turning on LED. Pushing reset switch restores normal operation. Based on comparison of input signal with time-delayed counterpart. Derivative of input signal, equal to its instantaneous slew rate, is measured accurately for swings of 6 V P-P as found in most 50-ohm video signals. Action is fast enough to detectglitches.—R. C. Culter, Slew-Rate Limit Detector is Simple, yet Versatile, EDN Magazine, Aug. 20, 1977, p 140－141.



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