Active Lowpass Filter Circuit with Attenuation of -18dB Every Octave

Published:2011/7/20 3:08:00 Author:Joyce | Keyword: Active , Lowpass, Filter Attenuation , -18dB, Every Octave | From:SeekIC

As shown in the figure is an active low pass filter circuit with attenuation of -18dB every octave. The circuit is composed of a passive filter with attenuation of -6 dB every octave and an active filter with attenuation of -12 dB every octave. The whole circuit shows a low pass filter with attenuation of -18 every octave. R1 and C3 form the passive filter, and R2, R3, C1, C2 and operational amplifier constitute the active filter.



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