STARTER_FOR_FLIP_FLOP

Published:2009/7/14 20:49:00 Author:May | From:SeekIC

Free-running flip-flop (thin lines) has several desired features but will not start oscillation by itself. Output impedance is less than 1,800 ohms, period is 1 millisec, and circuit is quite stable once in operation. Heavy lines show additions re quired for starting flip-flop when it is stalled.C3 (150 mfd) is in circuit for time period in which power supply voltage increases from 0 to 9 v after switch is dosed. Relay pulls in at 9 v, to remove C3 from circuit after it has served its starting function.-Starter Circuit for Flip-Flop, Electronic Circuit Design Handbook, Mactier Pub. Corp., N.Y., 1965, p 229.



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