BR4 Filter

Fourth oder band-rejection filter.

Transfer function

\[\frac{K * \omega_L^2 }{s^2 + 2 * d_L *\omega_L * s + \omega_L^2} + \frac{K * s^2 }{s^2 + 2 * d_U *\omega_U * s + \omega_U^2}\]

Variable	MORe variable name
\(K\)	Gain
\(\omega_U\)	Upper cutoff frequency
\(\omega_L\)	Lower cutoff frequency
\(d_U\)	Upper damping coefficient
\(d_L\)	Lower damping coefficient