- #1
Axe199
- 48
- 0
i was doing a research on active power filters and i read about Iref ( the cancelation waveform) extraction algorithm, and they are using complicated algorithms like FFT or DFT in frequency domain or the park transform and clark transform in time domain, i was wondering, why isn't there any technique using opamp active filters to extract the Iref? maybe a notch filter attenuating only the fundamental frequency?