HwB: Active Filter: Bessel 18dB Highpass

Active Filter: Bessel
(3st order, 18 dB/octave, Highpass)

C=4.7n-10nF
Ra=1.0474/(2*pi*Fc*C)
Rb=2.0008/(2*pi*Fc*C)
Rc=1.3228/(2*pi*Fc*C)

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

Contributor: Joakim Цgren

Source: ?

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