Sallen-Key high-pass (non-inverting)

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

Gain in the bandwidth: $A=1$

Cut-off frequency: $f_{\mathrm{c}}=\frac{1}{2\pi .C\sqrt{R_1{R}_2}}$

Damping coefficient: $m=\sqrt{\frac{R_1}{R_2}}$