DUAL_FUNCTION_SWITCH

Published:2009/7/14 1:05:00 Author:May | From:SeekIC

Pressing switch for less than 3 s produces single output pulse about 5μs wide. When switch is pressed longer than 3 s, single pulse is generated as before, and scan oscillator is turned on 3 s later. Oscillator runs as long as switch is held down, for producing repetitive stepping motion. Applications include positioning of test probes on single semiconductor chip or on wafer of several hundred chips, or indexing device either step by step or automatically through desired number of steps.-J. McDowell, Single Switch Controls Two Functions, EDN Magazine, April 5, 1974, p 78 and 80.



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