On Wed, 17 Jan 2001 09:15:46 -0500 "Doug Hall" <doug@nc.rr.com> writes:
>
>
>You have it backwards - FIR filters are phase linear, and have a fixed
group
>delay, whereas IIR filters do not. IIR filters mimic the operation of
analog
>filters (Butterworth, elliptical, etc.) but FIR filters are not
realizable
>in the analog world.
>73,
>Doug, K4DSP
>
Hi Doug,
Just for the history books, I can offer one example of an "analog" FIR.
The Reticon (last I heard acquired by EG&G) FIR filters (part no.
RT5602, if memory serves this morning) which were implemented with bucket
brigade technology.
I used one of those to implement an outboard CW filter about 15 years
ago.
73,
Marv WC6W
*
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