SECOND_ORDER_1_kHz_LOW_PASS

Published:2009/7/3 2:52:00 Author:May | From:SeekIC

Circuit using 741 opamp has equalvalue series input resistors and high-pass capacitors. Cutoff frequency can be increased by changing 10K resistors to higher values while keeping their values identical. 10:1 resistance change provides 10:1 frequency change. Damping d is adjustable; critical value of 1.414 gives maximum flatness of response without overshoot. Interchange 10K resistors and 0.016-μF capacitors to convert circuit to 1-kHz high-pass filter.-D. Lancaster, Active-Filter Cookbook, Howard W. Sams, indianapolis, IN, 1975, p 127-129.



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