7 Replies Latest reply on Nov 29, 2017 2:45 PM by cathy_terwedow

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

    mjk

      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.