Butterworthfilter är inom elektronik och signalbehandling ett filter som är designat för att ge så lite rippel i passbandet som möjligt, även benämnt . The Butterworth filter is a type of signal processing filter designed to have as flat a frequency response as possible in the passband. FiltersCachadLiknandeÖversätt den här sidanElectronics Tutorial about Butterworth Filter Design and about Designing High-order Low Pass Butterworth Filters with High Roll-off Rates.

This MATLAB function returns the transfer function coefficients of an nth-order lowpass digital Butterworth filter with normalized cutoff frequency Wn. This MATLAB function returns the lowest order, n, of the digital Butterworth filter with no more than Rp dB of passband ripple and at least Rs dB of attenuation in . An ideal bandpass filter passes some range of frequencies without distortion and suppresses all other frequencies. This video introduces a class of low-pass filters called Butterworth Filters. We conclude this sequence of videos on the Butterworth filter with a filter design example.

Basic calculations formulae and calculations for the Butterworth filter together with a table of some values.