Stats

  • Locked Locked
  • Replies 3
  • Subscribers 124
  • Views 14307
  • 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

Why Vt-Channel Length curve differs from Short Channel Effect?

richardyuan

The Vt-L plot looks weird. I cannot see a Vt drop down when L is reduced to near 0.18um for my nmos.

And even change the Vbs, there is no change for the curve.

Can anybody help to explain that?

Parents

  • Dear Andrew,

    Thank you very much.

    I checked the component parameter "Length" and found that the unit is meter really. Then I changed the ocean script:

    ......

    analysis('dc ?saveOppoint t ?param "Length" ?start "0.18e-6" ?stop "10e-6" ?lin "50")

    desVar( "Length" 0.18e-6)

    ......

    And finally I got a similiar image like you.

    By the way, your script looks neater and different from ocean skill. What is that and how to use it?(I'm a beginner for spectre simulation indeed)

    Can you introduce the method briefly(or the reference manual I should take a look)?

Reply

  • Dear Andrew,

    Thank you very much.

    I checked the component parameter "Length" and found that the unit is meter really. Then I changed the ocean script:

    ......

    analysis('dc ?saveOppoint t ?param "Length" ?start "0.18e-6" ?stop "10e-6" ?lin "50")

    desVar( "Length" 0.18e-6)

    ......

    And finally I got a similiar image like you.

    By the way, your script looks neater and different from ocean skill. What is that and how to use it?(I'm a beginner for spectre simulation indeed)

    Can you introduce the method briefly(or the reference manual I should take a look)?

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.