Stats

Locked Locked
Replies 3
Subscribers 125
Views 14942
Members are here 0

This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Cadence Virtuoso 6.16 model cards

Dear All,

I'm using Predictive Technology Model (PTM) model cards on cadence virtuoso 6.16, and drawing the characteristics ( Ids vs Vgs) of nmos and pmos, but I'm getting the characteristics of pmos like nmos (which is wrong), do anyone know what is the reason of that wrong behavior?

Thanks,

Osama

Andrew Beckett over 11 years ago

Assuming that you're getting the models from http://ptm.asu.edu perhaps you could give a link to which specific model you're using, and also post the spectre netlist you're using to test this. That way it would be easier to see what you're actually doing and to spot whether something is wrong in your setup.
Kind Regards,
Andrew.
Cancel
Vote Up 0 Vote Down

Cancel
DigitalOsama over 11 years ago

Hi Andrew Beckett,

Yes it's.

Here is the model:

http://ptm.asu.edu/modelcard/PTM-MG/modelfiles/lstp/7pfet.pm

I'm using Cadence virtuoso 6.1.6 and MMSIM12, kindly find the input.scs spectre file.

Thanks,
Osama
- input.scs.txt
- View
- Hide
Cancel
Vote Up 0 Vote Down

Cancel
Andrew Beckett over 11 years ago

Why do you think it's wrong? I couldn't see anything obvious that looked incorrect to me. You're sweeping over a wide range (the model file says nominal VDD of 0.7, and you have your VDD set to 1.0 and are sweeping the gate from -1 to 1 so you have some kind of problem at very small values of VGS). If I sweep from -0.5 to 1 the results remove that breakdown behaviour, but not sure what you think is wrong?
Regards,
Andrew.
Cancel
Vote Up 0 Vote Down

Cancel

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.