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Strange numbers in Virtuoso 6.1.5

JulianJ

 Hello,

I am seeing some strange number errors in Virtuoso 6.1.5.

In the ADE, I type  "1p" as the value for a variable and when set it appears as "1e122", "100f" becomes "1e155", "1f" becomes "1e155".

A similar error is also appearing on the drain diffusion area calculated on the FETs I am placing in my schematics, with the calculated area being displayed and netlisted as "480e155", when I think it should be "480f".

 I tried upgrading my instalation from  IC6.1.5-64b.500.1 to IC6.1.5-64b.500.9, but still have the same problem.

 Any help appreciated.

Julian

Parents

  • Thanks, Andrew!

    Alright, I changed to IC 6.16.080 (which is the next-highest version we have) and it indeed seems to works!

    I hope there won't be issues with the PDK or other things.

    OT: (I am cad novice) Are PDKs usually expected to run only with one particular version or more one version or above? (PDK just states requirements but it is not clear if the version need to be exact or not).

    Furthermore, how stringent need the other tools to fit IC? I used the closest match to what the PDK stated in the requirements (MMSIM 12.11.134, Calibre 2013.2, IUS 8.20.006). When I change now to IC 6.16.080, do I need to switch these tools as well?

Reply

  • Thanks, Andrew!

    Alright, I changed to IC 6.16.080 (which is the next-highest version we have) and it indeed seems to works!

    I hope there won't be issues with the PDK or other things.

    OT: (I am cad novice) Are PDKs usually expected to run only with one particular version or more one version or above? (PDK just states requirements but it is not clear if the version need to be exact or not).

    Furthermore, how stringent need the other tools to fit IC? I used the closest match to what the PDK stated in the requirements (MMSIM 12.11.134, Calibre 2013.2, IUS 8.20.006). When I change now to IC 6.16.080, do I need to switch these tools as well?

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