Butterworth

The filter-specific properties of a Butterworth filter are described here.

Properties of a Butterworth low-pass and high-pass

Butterworth 1:

Filter

Cutoff Frequency [Hz]:

Specifies the cut-off frequency. This must be between 0 and the sampling rate/2.

Filter Name:

Butterworth should be selected here.

Filter Type:

Here you can select between low-pass, high-pass, band-pass and band-stop.

Impulse Response:

An IIR filter (Infinite Impulse Response Filter) can be chosen.

Order:

The order must be > 0 and ≤ 10 (band-pass/band-stop) or ≤ 20 (low-pass/high-pass).

Sampling Rate [Hz]:

The sampling rate must be greater than 0.

 

 

Properties of Butterworth band-pass and band-stop

Butterworth 2:

Filter

Supplementary properties for these types

Bandwidth [Hz]:

The bandwidth must be > 0 and < (sampling rate/2 – cut-off frequency).