In an active Sallen-Key low pass filter, one of the caps is bootstrapped to the output. Do any one know why?
2006-08-26 20:45:47 · 2 answers · asked by Vins 1 in Science & Mathematics ➔ Engineering
It's not a bootstrap, it's a feedback path. And the reason that it's there is to put a pole in the transfer function at some desired frequency. The other pole is placed by the other capacitor (to ground) at the input summing junction.
You *do* understand about feedback loops, complex frequency, and transfer functions...... Don't you?
Doug
2006-08-26 21:09:54 · answer #1 · answered by doug_donaghue 7 · 1⤊ 0⤋
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2016-12-14 12:45:15 · answer #2 · answered by hillis 4 · 0⤊ 0⤋