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Digitaxly tuned low power active filter

2014-11-22 17:09  
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Constant gain, constant Q, variable frequency filter which provides simultaneous low-pass, bandpass, and high-pass outputs
Digitaxly tuned low power active filter

With the component values shown, center frequency will be 235 Hz and 23 Hz for high and low logic inputs respectively, Q = 100, and gain = 100.

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