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Circuits

Active Filter: Butterworth 18dB Highpass

(3st order, 18 dB/octave, Highpass)

3rd order Butterworth Highpass

C=4.7n-10nF
Ra=0.500/(2*pi*Fc*C)
Rb=2.000/(2*pi*Fc*C)
Rc=1.000/(2*pi*Fc*C)

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

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