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Re: Butterworth Filter Plug-in For MS Excel
: Butterworth Filter Plug-in For MS Excel -- BRichard1	Post Reply	Top of thread	Forum

Posted by: davamb ® 12/03/2005, 18:46:07 Author Profile eMail author Edit

4th order (I presume that's what you meam) Butterworth low-pass function has polynomial factors: Pn(s) = (s^2 + 0.765s + 1)(s^2 + 1.618s +1) Shouldn't be too hard for you to work out the transfer function equation as a function of (f) and run your data through it.

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