Do we have parasitic capacitance extraction for resistors?

[Alexandre Rusev]

Do we have parasitic capacitance extraction for resistors?

Thought technology defend parasitic capacitance for resistive poly layer I don't see parasitic capacitance lumped elements for reistors  in spice netlist.

Am I doing something wrong or this feature is not supported now?

The reason why I need them is following:

We are working on multiphase ring oscillators with resistive feedbacks.

These oscillators are used for building picotimers so they are running at critical speeds (likes 2.5GHz for 180nm process), so post layout simulation which takes into account resistors parasitics caps is very important for us.

[Steven Rubin]

Support for parasitics in the Spice decks is weak. There are a two options in the "Spice/CDL" Preferences: "Trans area/perimeter only" and  "Conservative RC". Neither is as good as you probably want, and they may not work on resistors at all. They certainly don't recognize resistive poly layers.

   -Steven Rubin

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