Stats

  • Locked Locked
  • Replies 4
  • Subscribers 125
  • Views 15330
  • 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

Taking the derivative produces a strange line plot

yannisuno

 Hello,

 I have a single NMOS device for which I sweep Vgs while keeping Vds constant.

 Ploting the drain current Id and taking its derivative, instead of producting a single line plot, I obtain a two lines plot which both connected to each other. Therefore, this plot is worng. I am using ver. IC6.1.4.

 Anyone knows what the problem is?

 Thanks,

Yannis

 

Parents

  •  Hello,

    first of all, many thanks for the reply.

    All I am trying to do is to plot the drain current Id of a single biased device (NMOS).

    It's a DC analysis that I am doing sweeping Vgs while keeping Vds at 10% of VDD.

    The expression in the calculator is the following: deriv(IS("/NM0/D"))

    and this is the plot I am getting:

    http://img843.imageshack.us/i/snapshotv.png/

Reply

  •  Hello,

    first of all, many thanks for the reply.

    All I am trying to do is to plot the drain current Id of a single biased device (NMOS).

    It's a DC analysis that I am doing sweeping Vgs while keeping Vds at 10% of VDD.

    The expression in the calculator is the following: deriv(IS("/NM0/D"))

    and this is the plot I am getting:

    http://img843.imageshack.us/i/snapshotv.png/

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.