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Atul
Atul
4 months ago

Hi, I need to use the ASAP7 model card for my simulation. How can I get that ??

Ingrid
Ingrid
10 months ago

Hi, can I have the link to the datasheet of these model files?

Prof. Tony
Admin
7 months ago
Reply to  Ingrid

These model files are representative of integrated circuit technologies, so there’s no particular datasheet for them. The basic model parameters correspond to those in the summary tables on the inside cover of the 2nd edition.

belal iqbal
belal iqbal
1 year ago

Hi,
do we need to create the variability file by ourselves? because not even PTM models are having a variability file that helps us to run monte Carlo. though I have created one for simulation, how to verify that I am close to reality?

Prof. Tony
Admin
7 months ago
Reply to  belal iqbal

Here are a couple of references with data on variability and mismatch:

Kinget, P.R., 2005. Device mismatch and tradeoffs in the design of analog circuits. IEEE Journal of Solid-State Circuits, 40(6), pp.1212-1224.

Tuinhout, H.P., 2003, September. Improving BiCMOS technologies using BJT parametric mismatch characterisation. In Proc. Bipolar/BiCMOS Circuits and Technology Meeting (pp. 163-170).

Anirban
Anirban
1 year ago

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

Prof. Tony
Admin
1 year ago
Reply to  Anirban

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

Anirban
Anirban
1 year ago
Reply to  Prof. Tony

Thanks for the clarification Prof.

Anonymous
Anonymous
1 year ago

Hello,

I see the model files only include the model for MOSFET. May I know where can I find model files for PNP/NPN and diodes as well?

Thanks

Prof. Tony
Admin
7 months ago
Reply to  Anonymous

Here is a typical model for an NPN transistor:
.model QECL NPN(Is=0.26fA Bf=100 Br=1 Tf=0.1ns Cje=1pF Cjc=1.5pF Va=100)

And here are models of a typical discrete NPN, PNP and diode:
.model Q2N3904 NPN(Is=6.734f Xti=3 Eg=1.11 Vaf=74.03 Bf=416.4 Ne=1.259
+ Ise=6.734f Ikf=66.78m Xtb=1.5 Br=.7371 Nc=2 Isc=0 Ikr=0 Rc=1
+ Cjc=3.638p Mjc=.3085 Vjc=.75 Fc=.5 Cje=4.493p Mje=.2593 Vje=.75
+ Tr=239.5n Tf=301.2p Itf=.4 Vtf=4 Xtf=2 Rb=10)

.model Q2N3906 PNP(Is=1.41f Xti=3 Eg=1.11 Vaf=18.7 Bf=180.7 Ne=1.5 Ise=0
+ Ikf=80m Xtb=1.5 Br=4.977 Nc=2 Isc=0 Ikr=0 Rc=2.5 Cjc=9.728p
+ Mjc=.5776 Vjc=.75 Fc=.5 Cje=8.063p Mje=.3677 Vje=.75 Tr=33.42n
+ Tf=179.3p Itf=.4 Vtf=4 Xtf=6 Rb=10)

.model D1N4148 D(Is=2.682n N=1.836 Rs=.5664 Ikf=44.17m Xti=3 Eg=1.11 Cjo=4p
+ M=.3333 Vj=.5 Fc=.5 Isr=1.565n Nr=2 Bv=100 Ibv=100u Tt=11.54n)

Anonymous
Anonymous
2 years ago

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

TCC
Admin
TCC
1 year 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
5 years ago

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

TCC
Admin
TCC
1 year ago
Reply to  Kathy

Approximate values are summarized in Table 1.4 of the text.

wladek60
wladek60
5 years ago

The 0.8 um CMOS lib file could not be found.

Prof. Tony
Admin
7 months ago
Reply to  wladek60

It’s provided by following the link above as an include file with the .MODEL embedded.

Matt
Matt
5 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
5 years ago
Reply to  Matt

These details are not specified in the posted model file.

Bhumit Rojivadia
Bhumit Rojivadia
6 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
5 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
6 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
6 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
6 years ago

please specify model foundry for the listed model file.

TCC
Admin
TCC
6 years ago

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

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