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[802.3_SPMD] Power Coupling Network Cnode Measurement



Please see the attached presentation where we measure Cnode on an example power coupling network for T1S.   Measurements are showing we are likely to exceed the Cnode budget once a common mode choke is added to the data path.    


Cnode,Phy = 12.5pF

Cnode,CMC = 9.5pF

Cnode,PoDL = 4pF


Can we rerun the models with higher Cnode? Add some extra margin and set it to 30pF, perhaps?



Michael Paul



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Attachment: cnode_measurement.pdf
Description: cnode_measurement.pdf