ZERO_CROSSING_SWITCH_FOR_HEART_SOUNDS

Published:2009/7/16 2:20:00 Author:Jessie | From:SeekIC

Active filter with three amplifiers provides output pulse for opening sliding gate at instant when heart sound being monitored is zero. Filter has sharp cutoff above highest-frequency heart sound (600 cps.)-R. Weiss, Heart-Sound Discriminator Simplifies Medical Diagnosis, Electronics, 34:24, p 52-55.



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