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I use the one recommended by the DAC maker !A while back someone posted that a Sallen-key active op amp filter might
not be the best topology for preserving the SNR of a signal coming from
a DAC.
What is the preferred filter type to get rid of alias products for an
audio signal after a DAC?
Stephen Boulet wrote:
A while back someone posted that a Sallen-key active op amp filter
might
not be the best topology for preserving the SNR of a signal coming
from
a DAC.
What is the preferred filter type to get rid of alias products for
an
audio signal after a DAC?
Stephen
Apart from the other notes already here, the filter function should be
considered. If you are reconstructing previously encoded analog
signals, then a raised cosine filter is the most common solution.
(That's because the encoding process induces a SinX/x Power
distribution on the signal).
A good paper on this may be found at
http://www.filter-solutions.com/raised.html
(Note : I have nothing whatever to do with the site)
Cheers
PeteS