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Questions about Advanced decoupling analysis(Gound nets connected with a resistor, VRM)

Question asked by mjk on Nov 26, 2017
Latest reply on Nov 29, 2017 by cathy_terwedow

Hi expert,

 

I have a few questions about Advanced decoupling analysis.

 

1. There is no decap effect when the reisistor connects two ground nets.

 

I simulated the circuit below.

circuit.jpg

and I found that there was no decap effect between power net and AGND.

graph.jpg

I'm wondering if I can do advanced decoupling analysis when two ground nets are connected with a resistor.

 

 

2. Whether Advanced Decoupling Analysis considers the VRM.

 

I found out that there is VRM effect in Lumped Decoupling Analysis.

However, for Advanced Decoupling Analysis I couldn’t find any VRM effect in the results.

I’d like to know whether I can do Advanced Decoupling Analysis with VRM.

 

Thank you.

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