# Active Filter: Butterworth 24dB Highpass

## (4th order, 24 dB/octave, Highpass)

C=4.7n-10nF

Ra=0.9239/(2*pi*Fc*C)

Rb=1.0824/(2*pi*Fc*C)

Rc=0.3827/(2*pi*Fc*C)

Rd=2.6130/(2*pi*Fc*C)

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

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Contributor:
Joakim Ögren
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Source:*

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Copyright © The Hardware Book Team 1996-2001.*

May be copied and redistributed, partially or in whole, as appropriate.

Document last modified: 2001-06-07