What you mean by Model files in Analog IC Design

[hioyo]

Dear Team,

May i know what you mean by Model files in analog IC design

What and all information we will get from it.

I know we will get channel length(L).
Will we get width also?

 

[dick_freebird]

No, the geometry information is attached to the schematic
instances or embedded in the device's netlist line. The
"model files" contain (duh) models that some simulator
will use, with per-instance geometry properties, to emulate
the specific device's behavior, comprehending geom, "make"
(process, mismatch), temperature to deliver the electrical
response to electrical stimuli.

Often in modern PDKs there is much code and "bundling",
with eventual model numerical values difficult or impractical
to evaluate on text alone. Some simulators will deliver you
a model-card for a device, with hard numbers for the params.
This, along with the .op report, tells you a lot about both the
specific device and the process.

From the models you'd pick off things like VT, Tox, area-,
width- and periphery-scaled junction and region attributes.
From the netlist you'd pick up L, W, NF, M and of course
a pointer to -which- model.