[Elecraft] K3 filters

[David Woolley]

Benny Aumala wrote:
> 
> DSP makes very steep  filters WIHOUT group delays.
> K3 concentrates best selectivity here. Correct!
> 
I think you meant that they don't have group delay variations.  They 
certainly have group delays; they work by adding together delayed 
versions of the signal.

Actually I have a feeling that constant group delay is only true of 
finite impulse response filters.

-- 
David Woolley
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