Butterworth 12dB Highpass

(filtru de ordinul 2, 12dB/octava, trece sus)

2nd order Butterworth Highpass

C=4.7n-10nF
Ra=0.7071/(2*pi*Fc*C)
Rb=1.414/(2*pi*Fc*C)

Unitati: Rx [Ohm], C [F], Fc [Hz]