Published:2009/7/3 2:19:00 Author:May | From:SeekIC
Use of four ganged pots permits varying cutoff frequency over 10:1 range. Table gives ranges obtainable with five different values for C.Opamps can be 741 or equivalent. Tracking of 5% for pots calls for expensive components, but ordinary snap-together pots may prove satisfactory if tuning range is restricted to 3:1 or less and more capacitor switching is used.-D. Lancas.ter, Active-Filter Cookbook, Howard W.Sams,Indianapolis, IN, 1975, p 195-197.
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