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Mixer IIP3 simulation in Cadence

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marmaduque

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Hi Everyone,

I am simulating a single balance mixer in Cadence using QPSS. When plotting the IIP3, I don't obtain a 3:1 slope as expected, but a slope much lower. This issue is mentioned in the following thread but there are no further comments on it: https://www.edaboard.com/threads/25014/
Has anyone had s imilar issue and knows the causes? I suspect it has to do with the PORT sources but I'm still not sure what it could be...

Thanks in advance!
 

How about running the simulation at a lower RF power level?
 

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