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Slow Simulation Time in Cadence

ksnf3000

Hi All,

I have a question related to the simulation timing in Cadence. Often, my simulation is very slow and the step time used is in ps. This makes me wonder if there is something wrong in the circuit i maybe simulating.

Please find attached the screenshot showing the same. FYI...I am simulating for a time t = 520µs and my circuit has Edge-triggered DFFs and my Cadence version is IC6.1.5.500.132

Please let me know is this a cadence related issue or ciruit related.

Thanks for your help!! 

Regards,

Kashif

  • Hi Kashif,

    In general such issues are either circuit (or model) issues. I'd suggest contacting customer support and then we can look at your simulation and give better advice - it's very hard to generalize. Short timesteps tend to be caused by discontinuities in models - or very abrupt transitions in voltage sources (somewhat similar). Also having unrealistically large component values - e.g. very large inductors and capacitors can make it worse...

    But if we can take a look, we'll be able to provide better help.

    Kind Regards,

    Andrew.

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