Darrell,
Yes, we are also dealing with the AC 97 Codec. Our experience has been
that it produces RF Emissions, but I would say that both common mode and
differential mode noise contribute to the overall RF Emissions problem. I
don't believe that you will solve the Emissions problem
Darrell:
With respect to your radiated emissions dilemna, useful information
would be the clock speeds, cable lengths, and worst-case mode of
operation at which emissions are the highest. Generally, if you invoke
the divide and conquer rule, it should be an easier matter pinpointing
the dominant
-input.com]
Sent: Friday, February 22, 2002 11:12 AM
To: emc-p...@majordomo.ieee.org
Subject: AC 97
Esteemed Colleages;
Has anyone had experience using Audio-Codec '97 (AC 97) topology with
respect to EMC performance. It is commonly used in PC sound cards. We have
a device that incorporates
Esteemed Colleages;
Has anyone had experience using Audio-Codec '97 (AC 97) topology with
respect to EMC performance. It is commonly used in PC sound cards. We have
a device that incorporates this technology for voice recognition and are
seeing very high emissions between 100-600 MHz
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