Re: design a digital butterworth filter using matlab??


<VijaKhara@xxxxxxxxx> wrote in message
news:1130603855.459519.156340@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Dear members:
> In the demo in my class, my prof uses matlab to design a
> digital
> butterworth filter. He first designs an analog filter
> using funtion
> butter(, , 's') and then uses bilinear transformation to
> convert the
> analog filter to a digital filter.
>
> Since I know MATLAB function butter()allows us to directly
> design a
> digital butterworth filter, I am wondering what are the
> advantages of
> my prof's method over the direct design method?

You might not always have MATLAB available, but presumably
you'll always be able to look up the technique your
professor is trying to teach you.

Having just done exactly what you describe without benefit
of MATLAB, I can appreciate your professor's diligence.

So pay attention, already.


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