Stats

  • Locked Locked
  • Replies 4
  • Subscribers 125
  • Views 17504
  • 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

How to plot something vs Vov

Pyroblast

Hi guys,

I am exploring the gm/id methodology.

It happens that I managed to plot gm/id vs vgs and now I would like to plot the gm/id vs vov. I tried plotting by using the calculator but I didn't get a proper result.

Then I thought that I could plot the Vdsat vs Vgs and from here try to use some cadence feature to plot the gm/id vs Vdst.

I don;t know if Vdsat is the same as Vov. Can someone confirm? Is that the correct way to do it?

What can I do plot then gm/id vs Vdsat?

Regards.

Parents
  • Andrew Beckett

    If you're sweeping Vgs, then you could just calculate xval(Vth)-Vth (or xval of anything from the dc sweep; this will give you the x-axis of the sweep versus itself). 

    Since I've never come across Vov until I did a Google search the other day, I'm not particularly well placed. However, I would trust Geoffrey Coram's response in this thread (he would know these things) that Vdsat being similar to Vgs-Vth was probably an approximation from some very old and much simpler device models that doesn't hold true in anything recent.

    Regards,

    Andrew

Reply
  • Andrew Beckett

    If you're sweeping Vgs, then you could just calculate xval(Vth)-Vth (or xval of anything from the dc sweep; this will give you the x-axis of the sweep versus itself). 

    Since I've never come across Vov until I did a Google search the other day, I'm not particularly well placed. However, I would trust Geoffrey Coram's response in this thread (he would know these things) that Vdsat being similar to Vgs-Vth was probably an approximation from some very old and much simpler device models that doesn't hold true in anything recent.

    Regards,

    Andrew

Children
No Data

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.