[sdiy] Designing 4-pole filters with identical 2-pole stages - why not?

[Donald Tillman]

> On Dec 19, 2015, at 11:19 AM, Donald Tillman <don at till.com> wrote:
> 
> Let's plot the math:

Oh dear, no imbedded graphics?  (Paging Mr. Jansen...)

Here:

    http://till.com/random/butter.jpg

  -- Don

--
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com




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