Butterworth 12dB Lowpass

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

R=4.7k-10 kOhm
Ca=1.414/(2*pi*Fc*R)
Cb=0.7071/(2*pi*Fc*R)

Unitati: R [Ohm], Cx [F], Fc [Hz]