Rauch low-pass (inverting)

Transfer function: $H(j\omega )=A\frac{1}{1+2m.j{\displaystyle \frac{\omega }{{\omega }_c}}+{\left(j{\displaystyle \frac{\omega }{{\omega }_c}}\right)}^2}$

Gain in the bandwidth: $A=-1$

Cut-off frequency: $f_{\mathrm{c}}=\frac{1}{2\pi .R\sqrt{C_1{C}_2}}$

Damping coefficient: $m=\frac{3}{2}\sqrt{\frac{C_2}{C_1}}$