Bandpass filter techniques

Rune Allnor wrote:
> Jerry Avins wrote:
> 
>>I haven't the inclination or endurance to write a treatise on
> 
> filters,
> 
> [... excellent treatise snipped ...]
> 
> Ehmm... it would be very interesting to see what would come out of
> it if you ever wrote such a thing "for real"... 
> 
> Rune

I might have mentioned that, whereas the poles of a Butterworth lie
equally spaced on a semicircle, those of a Chebychev Type I lie on a
semiellipse (the semidiameter on the real axis is shortened) but are
otherwise similarly arrayed; that a Butterworth's transfer function has
only one variable term (that, in the denominator) and the exponent of
that term is the order of the filter; and ...

But I'm not writing that treatise, am I?

Jerry
-- 
Engineering is the art of making what you want from things you can get.
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Jerry Avins wrote:
> Rune Allnor wrote:
> > Jerry Avins wrote:
> >
> >>I haven't the inclination or endurance to write a treatise on
> >
> > filters,
> >
> > [... excellent treatise snipped ...]
> >
> > Ehmm... it would be very interesting to see what would come out of
> > it if you ever wrote such a thing "for real"...
> >
> > Rune
>
> I might have mentioned that, whereas the poles of a Butterworth lie
> equally spaced on a semicircle, those of a Chebychev Type I lie on a
> semiellipse (the semidiameter on the real axis is shortened) but are
> otherwise similarly arrayed; that a Butterworth's transfer function
has
> only one variable term (that, in the denominator) and the exponent of
> that term is the order of the filter; and ...
>
> But I'm not writing that treatise, am I?

I don't know. Are you? Nevertheless, it's always fun to read stuff
from people who are capable of presenting complicated stuff in
both succinct, comprehensable and precise ways.

Rune

Rune