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.  The offending RF noise
source appears to be entirely differential.

Thanks

Darrell Locke
Advanced Input Devices 

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