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That has nothing to do with digital butterworth filter, sorry for the confusion. it was just an example of how the output of the filter should be. It was a lowpass PT1 filter.
I want to design a digital butterworth lowpass filter of nth order, with only freedom of choice to user being order of the filter and the cut off frequency, i already have a 1st order low pass.
T = 1/(2*pi*this.fc);
this.A = -1/T;
this.B = 1/T;
this.C = 1...
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