A single-op amp realization of a general biquadratic transfer function [Eq. (4-63)] using the Friend circuit was shown in Section 4.3. In this section we show how easily a general biquad can be ...
We consider first the biquadratic active- RC sections that use a single op amp, configured in either an inverting (negative-feedback) or noninverting (positive-feedback) mode, in a single-loop ...