Regarding MOnte-carlo simultation using cadence spectre

[devender123]

Hi all,
I want to plot monte carlo samples using FinFET 7nm PDK (from PTM.asm) in cadence spectre.
But i am getting the error:
"mc1: Attempt to run Monte Carlo analysis with process and mismatch variations, but no variations were specified in the statistics block."
How to solve it?

 

[dick_freebird]

Are you sure that this PDK has Monte Carlo models in it?

If yes then you have to figure out how to invoke that path to
the MC models (which may reside separately from the
corner-case models).

But many digital flows only provide corner models.

Whoever gave you the kit should have given you the
instructions to run whatever kind of analysis the kit can
support.

 

[devender123]

The PDK file does not include the monte-carlo models. It only includes corner analysis but i want to add monte-carlo models in it. Is this possible?

 

[BigBoss]

The PDK file does not include the monte-carlo models. It only includes corner analysis but i want to add monte-carlo models in it. Is this possible?

No, Monter Carlo Statistical Simulation needs process Variations Information for each Process Variable. You cannot do that by yourself, the Foundry can do only.

 

[dick_freebird]

You could fake it if you understood process control limits
and correlations, but good luck getting that.

What you could do is put "k params" onto any model
param you think represents significant variation and
loop or loop-random, those values. If you are after
go / no-go test or datasheet limits, that's how we used
to roll before getting all Monte about every little thing.