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Importing Parasitic Netlist to Virtuoso (Wrong Model Name)

anurans

Hi All,

I have an extracted netlist with parasitics given by foundry for a standard cell library. A part of the netlist is shown below (which looks more like a .cdl than a pex.netlist) 

https://pastebin.com/CL0mBqEu

I imported the entire netlist (File->Import->Spice....) to an OA symbol library (in IC 6.1.5) by attaching to the corresponding technology library. The device mapping file looks like below:

However when I run ADE on one of the imported component, simulation fails with a list of errors like below: 

Error found by spectre in `_sub0', during circuit read-in.
ERROR (SFE-23): "input.scs" 579: c0 is an instance of an undefined model CAPACITOR.
ERROR (SFE-23): "input.scs" 580: c1 is an instance of an undefined model CAPACITOR.
ERROR (SFE-23): "input.scs" 581: c2 is an instance of an undefined model CAPACITOR.
ERROR (SFE-23): "input.scs" 582: c3 is an instance of an undefined model CAPACITOR.
ERROR (SFE-23): "input.scs" 583: r4 is an instance of an undefined model RESISTOR.
ERROR (SFE-23): "input.scs" 584: r5 is an instance of an undefined model RESISTOR.
ERROR (SFE-23): "input.scs" 585: r6 is an instance of an undefined model RESISTOR.
ERROR (SFE-23): "input.scs" 586: r7 is an instance of an undefined model RESISTOR.
ERROR (SFE-23): "input.scs" 587: r8 is an instance of an undefined model RESISTOR.
ERROR (SFE-23): "input.scs" 588: r9 is an instance of an undefined model RESISTOR.

And it looks like the parasitic components of imported cells have either RESISTOR or CAPACITOR as model name which hasn't been defined in model library. However this is not the case when Parasitics are manually extracted for a custom cell.

Any resolution for this ?

Thanks and Regards

Anuradha

Parents
  • Andrew Beckett

    Hi Anuradha,

    Because there is no subtype in the CDL netlist defined for the capacitors, it picks the default "CAPACITOR" and creates a property called subtype and model with that value. If you don't want this, add in the User Prop Mapping:

    model dummy subtype dummy2

    that will map both the properties to new names (dummy and dummy2) and will avoid the problem you're seeing.

    Andrew.

  • anurans
    in reply to Andrew Beckett

    Thanks Andrew, that did the trick..... ;) 

    Anuradha

Reply
  • anurans
    in reply to Andrew Beckett

    Thanks Andrew, that did the trick..... ;) 

    Anuradha

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