How can I add custom mosfet models?

[svenboulanger]

Hi!

Is it possible to add my own LEVEL for mosfet models, and how would I do that? I would like to tie the BSIM3-6 models into Spice#.Parser and read foundry models.

Yours sincerely,
Sven

[marcin-golebiowski]

Take a look at CustomMosfetModelTest class and When_CustomMosfetModel_Used_NoExceptions test.

[svenboulanger]

Hi, thanks for the reply! I can see how I can add a custom mosfet level.

Another piece of SPICE syntax that I see is the lmin, lmax, wmin and wmax parameters.

.model nmos_mod.1 nmos (lmin=65n lmax=180n wmin=100n wmax=1u ...)
.model nmos_mod.2 nmos (lmin=180n lmax=350n wmin=100n wmax=1u ...)
...

* This automatically selects nmos_mod.2 based on the width and length parameters
Mnmos drain gate source bulk nmos_mod w=0.5u l=200n

For example, this occurs in the BSIM3v3 model (ngSpice version in section A.9), and it is used by the CMOS foundry PDKs that I'm trying to parse. Is this feature supported?

Yours sincerely,
Sven