Theory 101 - Impulse response of "perfect" LPF

Jerry Avins wrote:

(snip)
(someone wrote)

>> My guess is that the poster was referring to the fact that a 
>> superconducting inductor has no serial resistance, inferring a 
>> "perfect" inductor, and made the incorrect jump that a perfect 
>> inductor could be used to build a perfect filter-- i.e., his 
>> definition of "perfect low pass filter" was not what others in this 
>> thread are using. It wouldn't seem like he meant to say that you could 
>> use a superconducting inductor to make a brick wall filter.

> You're probably right. I've been jumping at a lot of wrong conclusions 
> lately, especially when the wording gives me an initial shove (impulse?) 
> in the wrong direction.

Yes, I read it as the inductors weren't perfect causing the filters
to be less than perfect.  Still, I am not so sure of the properties
of filters made with superconducting inductors.

-- glen

Clay wrote:
> PeteS wrote:
> > Rune Allnor wrote:
> >
> > [1] I have a BA in mathematics, and it was stated to me that 'one gets a
> > BA because mathematics is not science, it is one of the arts'.
> >
>
> Hello Pete, whether it is a BA or a BS in math is up to the university
> or the underwriting authority. Many schools offer both with the BA
> trading a few hours of math for a few hours of a language such as
> Spanish, French, German, etc.
>
> IIRC, Newton called Mathematics the Queen of the sciences.
>
> Clay

Well, my memory partially failed me. It was Gauss who wrote
"Mathematics is the Queen of the Sciences"  

Clay