Butterworth Filter VI
- Updated2025-03-14
- 1 minute(s) read
Generates a digital Butterworth filter by calling the Butterworth Coefficients VI. Wire data to the X input to determine the polymorphic instance to use or manually select the instance.

After calling the Butterworth Coefficients VI, the Butterworth Filter VI calls the IIR Cascade Filter VI to obtain a Butterworth Filtered X sequence.
The values for high cutoff freq: fh and low cutoff freq: fl must observe the following relationship:
0 < f1 < f2 < 0.5fswhere f1 is low cutoff freq: fl, f2 is high cutoff freq: fh, and fs is sampling freq: fs.
Examples
Refer to the following example files included with LabVIEW.
- labview\examples\Signal Processing\Filters\Extract the Sine Wave.vi