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Creating all pin symbol containing inherited power\ground connections

saikatc

Hi,

I am working on Virtuoso, version IC6.1.7-64b.500.4. I am using inherited connections in the schematic. AFter parasitic extraction, I observe that the inherited connections are missing in the netlist. I know that it is not recommended to use inherited netlist. Still, is it possible to have a work around so that with the inherited connections we can have a symbol with all the power\ground pins?

thanks in advance.

Saikat Chatterjee

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  • Andrew Beckett

    Typically I'd expect the inherited connections to become explicit once layout has been done - effectively you've "hardened" the connections.

    It's not clear which inherited connections you're talking about - if it was to the leaf components, I'd expect you to have them connected to real power connections. If it was for the extracted block itself, then it may just be that you haven't got pins on your layout view with the netExpressions on.

    Wasn't clear which extraction tool you're using either?

    Andrew.

Reply
  • Andrew Beckett

    Typically I'd expect the inherited connections to become explicit once layout has been done - effectively you've "hardened" the connections.

    It's not clear which inherited connections you're talking about - if it was to the leaf components, I'd expect you to have them connected to real power connections. If it was for the extracted block itself, then it may just be that you haven't got pins on your layout view with the netExpressions on.

    Wasn't clear which extraction tool you're using either?

    Andrew.

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