options random home http://www.blackdown.org/~hwb/mi_ActiveFilterBessel2L.html (Amiga Plus Extra No. 5, 08/1997)

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Active Filter: Bessel
(2nd order, 12 dB/octave, Lowpass)

2nd order Butterworth Lowpass

R=4.7k-10 kOhm
Ca=0.9076/(2*pi*Fc*R)
Cb=0.6809/(2*pi*Fc*R)

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

Contributor: Joakim Ögren
Source: ?
Please send any comments to Joakim Ögren.