Butterworth 18dB Highpass

(filtru de ordinul 3, 18 dB/octava, trece sus)

3rd order Butterworth Highpass

C=4.7n-10nF
Ra=0.500/(2*pi*Fc*C)
Rb=2.000/(2*pi*Fc*C)
Rc=1.000/(2*pi*Fc*C)

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