CRYSTAL_CONTROLLED_OSCLLATOR_OPERATES_FROM_ONE_MERCURY_CELL

Published:2009/7/1 3:51:00 Author:May | From:SeekIC

The circuit is powered by a single 1.35 V mercury cell and provides a 1 V squarewave output. As shown, the crystal is a tuned circuit between transistors Q1 and Q2, which are connected in the common-emitter configuration. Positive feedback provided by means of R permits oscillation. The signal at the collector of Q2 is squared by Q3, which switches between cutoff and saturation. R7 permits short-circuit-proof operation.



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