AF_NOTCH

Published:2009/7/2 21:07:00 Author:May | From:SeekIC

Notch frequency is easily tuned at frequencies below 1 kHz with single capacitor C1 or by replacing R1 and R2 with 249K pot. For higher frequencies, use 118 opamp for A1 and 5K for R3 while lowering other resistances in proportion to R3.Indicated resistance tolerances are necessary for optimum notch depth.-W. G. Jung, IC Op-Amp Cookbook, Howard W.Sams,Indianapolis, IN, 1974, p 340-341.



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