Butterworth 24dB Highpass

(filtru de ordinul 4, 24 dB/octava, trece sus)

4th order Butterworth Highpass

C=4.7n-10nF
Ra=0.9239/(2*pi*Fc*C)
Rb=1.0824/(2*pi*Fc*C)
Rc=0.3827/(2*pi*Fc*C)
Rd=2.6130/(2*pi*Fc*C)

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