50_DUTY_CYCLE_WITH_555

Published:2009/7/15 2:30:00 Author:Jessie | From:SeekIC

Provides pure square-wave output without sacrificing allowable range of timing resistance. Q1 replaces conventional timing resistor going to V+. Pull-up resistor R1 is required to switch Q1 fully on when it is driven by output of timer.-W. G. Jung, Take a Fresh Look at New IC Timer Applications, EDN Magazine, March 20, 1977, p 127-135.



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