Butterworth 18dB Lowpass

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

3st order Butterworth Highpass

R=4.7k-10 kOhm
Ca=2.000/(2*pi*Fc*R)
Cb=0.500/(2*pi*Fc*R)
Cc=1.000/(2*pi*Fc*R)

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