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Anirban
Anirban
2 months ago

Is there a way to import the 7nm FinFET model files into LT Spice ?

Prof. Tony
Admin
1 month ago
Reply to  Anirban

Unfortunately, in my understanding, LTSpice doesn’t accept BSIM-CMG model files at this time.

Anirban
Anirban
1 month ago
Reply to  Prof. Tony

Thanks for the clarification Prof.

Anonymous
Anonymous
1 year ago

there are no Isub models in 0.8u/0.35u/0.18u process. Why?

TCC
Admin
TCC
10 months ago
Reply to  Anonymous

Actually, subthreshold current is modelled in both the 0.35u and 0.18u model files. You can see the subthreshold behaviour clearly in Figure 1.28, which was generated using the provided 0.18um model files. However, not all simulators will properly implement that part of the models.

The 0.8u model files are just simple level 3 SPICE models, which don’t include subthreshold current. Generally speaking, subthreshold current is less of a concern in that technology.

Kathy
Kathy
4 years ago

For the above models how can I find the Kp values for NMOS and PMOS?

TCC
Admin
TCC
10 months ago
Reply to  Kathy

Approximate values are summarized in Table 1.4 of the text.

Matt
Matt
4 years ago

Hi,

For technology 0.18um 1.8V BSIM 3.1:

1. What is W and L range (Wmin, Wmax, Lmin, Lmax)?
2. What is size step (is it called scale factor?) for W and L? For example, is it equal to 1nm, that is 0.001 um?

Kind Regards,
Matt

TCC
Admin
TCC
4 years ago
Reply to  Matt

These details are not specified in the posted model file.

Bhumit Rojivadia
Bhumit Rojivadia
5 years ago

In 0.18um model card, in values of some parameters such as Tox, U0 etc. there is additional term “proc_delta”, what it means and what value it takes while simulation?
Thank you.

TCC
Admin
TCC
4 years ago

The term “proc_delta” is a simluation parameter that accounts for deviations in certain transistor parameters (Tox, U0, etc.) from their nominal values due to manufacturing process variations. Note the model card is not to be used on its own. Included in the same zip file are include files for …ff, …ss, and …tt process corners (fast, slow and typical respectively) which assign appropriate values to proc_delta and then instantiate the model card.

sanaz
sanaz
5 years ago

Hello
I use 0.18um CMOS model for my design. I downloaded its Model File from your site. Would you please telling me which parameter shows the factor “n” of subthreshold region of MOSFET?
Thanks alot

TCC
Admin
TCC
5 years ago
Reply to  sanaz

The most significant parameters are “NFACTOR=2.30E+00” for NMOS and “NFACTOR=2.00E+00” for PMOS in the 0.18um model provided. However, other terms such as CDSC, CDSCD and CDSCB capture channel length dependent effects on n.

pankaj prajapati
pankaj prajapati
5 years ago

please specify model foundry for the listed model file.

TCC
Admin
TCC
5 years ago

These are general BSIM models; they are not models for any specific foundry.

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