@Tim Edwards I'm looking at the

extract_for_sim.tcl

that you gave to @Matt Venn and it calls

ext2spice

twice, one with

-d

and one without. But what surprises me is that the resulting SPICE file of calling it with

-d

has the

ad=0 pd=0 as=0 ps=0

for most devices while calling it without

-d

has those distributed across several devices and looking at the doc, I would have expected the exact opposite ...

The

-d

(distributed source/drain area and perimeter) option has been deprecated. The

-d

option was, at best, a hack solution, and I'm not sure that it ever worked correctly with a full R-C extracted netlist. So I implemented a method to properly track the source/drain areas/perimeters so the values will always be correct, and

-d

is not needed.

Ok, good to know 🙂