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Ansys Learning Forum › Forums › Discuss Simulation › Electronics › Ansys Electronics Desktop – Circuits – Convolution for transient simulation › Reply To: Ansys Electronics Desktop – Circuits – Convolution for transient simulation

January 29, 2024 at 8:56 pm
Dan Dv
Ansys Employee

Hello Lucas,

In general we consider convolution to be a less robust, and generally less accurate algorithm. I can't get into the details of the alorithms here, but state-space is strognly preffered with convolution provided basically as a fall back.

On that note 64GB of memory is usually more than enough for a DDR Circuit transient. Can you let me know what is going on when it runs out of memory? Is it at the start of the transient simulation? That is when we do the actaul state-space fitting, and is usually the most memory intensive part of the solve. Did you happen to enforce passivity on the s-parameters, and if so which option did you choose? 

Best regads,

-Dan