SCHMITT_FROM_555_TIMER

Published:2009/7/2 5:11:00 Author:May | From:SeekIC

Only three additional parts need be added to standard 555 timer to give fully TTL/DTL-compatible Schmitt trigger that responds to slow input ramps as well as straight DC levels. With output initially high, increasing input from 0 to about 1.35V drives output low. Conversely, input can decrease to about 0.7 V before output goes high again.-M. K. Lalitha and P, R, Chetty, Variable-Threshold Sch mitt Tdgger Uses 555 Timer, EDN Magazine, Sept. 20, 1976, p 112 and 114.



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