422_kHz_NOTCH

Published:2009/7/2 9:18:00 Author:May | From:SeekIC

Circuit consists of positive unity-gain opamp, RC twin-T network, and T network R1C1 that determines circuit Q. Variable Q feature is controlled by single passive RC network. Center frequency of notch filter is about 4.22 kHz. Table gives values of R1 and C1 for three different values of Q.-H. T. Russell, Notch Filter Has Passive Q Control, EDN/EEE Magazine, July 1, 1971, p 43 and 45.



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