Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Inshort every foundry has its own models ,as a designer you just need to worry about the models supporting in subthreshold ,linear and saturation regions for Mos and models for other passive and active components .
Ask the modeling guys to check if the special things like montecarlo ,process corners,leakage,tolerance are included in the models or not befrore running various analysys .
Well, as mentioned above, there are a lot of models and each of them serve a different purpose.
The SPICE Level1 model is the IDEAL model. It closely resembles the IDEAL device behavior and is used for simulations and IDEAL modelling. This model cannot be used for commercial device/IC design. This is also true for the LEVEL2 and LEVEL3 models. The difference in these models is that each model will include more parameters for the transistor.
The commercial grade models are the BSIM3,BSIM4,MOS9,etc, from the standard foundaries. These models include a lot of information about the process paramaters, parasitics and other effects that are present in the IC fabrication process and very closely resemble the real world transistor.
If you open the model files that come with a simulator, you will find that each model will contain different information and the parameters also vary. For ideal device simulations, one should use the LEVEL1,LEVEL2 and LEVEL3 SPICE models, whereas, for IC design purposes you should always go for the BSIM3,BSIM4 , LEVEL49 SPICE model as these are more accurate.
Does bsim3 inculde Vgs<0(for nmos) situation?Why the Ids reaches about fractions of pA when the Vgs<0??!!It is a dpdm mixed signal process.
I fixed the Vds and sweep the Vgs from Vth to 0,the output is linear rather than exponential...What is going on...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.