I was recently low entropy equations of passive filters, and came across the Extra Element Theorem and all of its uses.
I was wondering if the there is something similar for OP AMP circuits/ Active Filter Circuits?
I was recently low entropy equations of passive filters, and came across the Extra Element Theorem and all of its uses.
I was wondering if the there is something similar for OP AMP circuits/ Active Filter Circuits?
Yes, active filters are simply passive filters where you can ignore impedance losses and you don't have to worry about load or source impedance.
Here is an example of turning a transfer function into a "low entropy" state for an active filter
$$ W(s) = \frac{R_2}{-R_1+(-R_2-R_3)C_1R_1s-C_2C_1R_3R_2R_1s^2}$$
to
$$H(s) = -\frac{R_2}{R_1}\frac{1}{1+(R_2+R_3)*C_1s+C_2C_1R_3R_2s^2}$$
Source: https://www.maximintegrated.com/en/app-notes/index.mvp/id/5597