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
Emails are not formal business letters, whatever businesses may want.
RFC1855 says there should be an address here, but, in a world of spam,
that is no longer good advice, as archive address hiding may not work.
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