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Transient simulation - varying accuracy

patschouly

I'm simulating two circuits together that have very different time resolution requirements (ms vs. ns). I need the first circuit to settle, which takes up to 100 ms. During this time, I'm happy just to completely ignore the other one (a ring oscillator). Is there a way to do this? I've read some forum posts on varying the errpreset, but that is not enough to solve this. I tried changing both minstep and maxstep, but I'm not sure whether it is possible to use minstep as dynamic parameter.

I'm happy for any pointer on this.

Kind regards,

Patrick

Parents
  • firebolt

    Like Andrew said, enabling oscillator at a later stage is better option. Another approach is you can try dynamic accuracy. Liberal till 100ms. Then conservative. Check this post.
    https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/28641/how-to-set-different-accuracy-settings-for-different-time-periods-in-transient-simulation

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  • firebolt

    Like Andrew said, enabling oscillator at a later stage is better option. Another approach is you can try dynamic accuracy. Liberal till 100ms. Then conservative. Check this post.
    https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/28641/how-to-set-different-accuracy-settings-for-different-time-periods-in-transient-simulation

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