digital Butterworth filter calculator

order:
pass:
sampling frequency: Hz
3dB cutoff frequency: Hz
impulse response 512 samples gain unity 0 phase lag π 0-½f Hz

4.841⋅yi = (1⋅xi + 2⋅xi-1 + 1⋅xi-2) + 1.789⋅yi-1 + -0.948⋅yi-2


Notes: