R=4.7k-10 kOhm Ca=0.7298/(2*pi*Fc*R) Cb=0.6699/(2*pi*Fc*R) Cc=1.0046/(2*pi*Fc*R) Cd=0.3872/(2*pi*Fc*R)
Units: R [Ohm], Cx [F], Fc [Hz]