1_kHz_BIQUAD_BANDPASS

Published:2009/7/2 23:18:00 Author:May | From:SeekIC

Three 741 opamps are connected to give two integrators and inverter. Overall gain is -Q, determined by value of input resistor used. Circuit is tuned by varying capacitors in steps. Absolute bandwidth remains constant asfrequency changes. Chief applications are in telephone systems, where identical absolute-bandwidth channels are required.-D. Lancaster, Active-Filter Cookbook, Howard W. Sams, Indianapolis, IN, 1975, p 159-164.



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