2021-08-03 at 11:08 am
#1188
Haajee
Other than pure sine wave have harmonics; but keep in mind it depends that Even or Odd harmonics are in the distorted wave-form Square & Triangular waveforms have only one of the even or odd harmonics, I do not remember. Fourier Analysis can reveal it. So filter may pass such harmonics if those are there in the distorted waveform.