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ok..thanks you for all comments... i accept the fact that i was rude to you all.. i am really sorry and wish you a nice weekends.. fyi, i have found the answers for my questions.. bye..(hopefully a peace and happy ending)

at least look at my background(computer programming)... may be it is so clear as sunlight to you and my questions look so dumb.. just drop some answers, that should be enough..

hv = have "i hv cutoff freq at 2kHz, and at fs, the gain is -20dB = 0.1" -20dB at fs(this is my freq which I work at).. better slow than never...

hi..now i hv a better understanding on the filter..thanks to all comments which make me to think properly.. forget previous questions as I hv another question.. i suppose to have a filter working at fs..so far, when i read articles, the cutoff frequency should be between input freq (50Hz) and...

no..kind of filter design project.. although I hv computed the components' values, still I not quite understand about how it works.. btw, thanks a lot

Hallo guys.. I hv very basic questions which need your help to clarify them.. Let say that I hv a LC filter, tuned at 8kHz with THDv and THDi limit to 5%, configured for 3-phase system (400Vrms,562VAC,50Hz,10A) a) if there is a spike of i.e. 60V, how does the filter actually deal with it...