• Skip to main content
  • Skip to search
  • Skip to footer
Cadence Home
  • This search text may be transcribed, used, stored, or accessed by our third-party service providers per our Cookie Policy and Privacy Policy.

  1. Community Forums
  2. Custom IC Design
  3. How to save transient operating point?

Stats

  • Locked Locked
  • Replies 7
  • Subscribers 125
  • Views 31268
  • 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 save transient operating point?

BaaB
BaaB over 9 years ago

This is an old answer to saving DC operating points. I am wondering if there is a similar way to do that with transient analysis. I would like to save all transient operating point parameters and then plot them with time.

I tried the solution here but that doesn't work. The transient directory doesn't have the needed info.

I am using IC6.61-64b.500.9 and MMSIM13.1.1.049 64 bit.

QUOTE: Answer by Andrew:

This is a very commonly asked question.

Create a text file (called, say, saveop.scs) with the following contents:

// include file to save op point data
save M0:all

where M0 is the name of the mosfet. See "spectre -h save" for more details on the save statement.

Then, in Setup->Model Libraries, reference this file (I gave it a .scs suffix so it is interpreted in spectre syntax).

Run your DC sweep, and then you can access the results via the results browser - or just use an expression such as:

getData("M0:vdsat" ?result 'dc)

This will then show vdsat versus the swept parameter. 

The same approach will work if you want to save operating point during a transient - you can always just save the specific op point information by doing:

save M0:gm M0:vdsat

for example.

Best Regards,

Andrew.

 

  • Cancel
Parents
  • BaaB
    BaaB over 9 years ago

    Hi,

    The method uses Outputs->To Be Saved->Save OP Parameters works but how about if I want to save more parameters of a component at the same time (for example, ron, rout,...) or save all operating point parameters?

    • Cancel
    • Vote Up 0 Vote Down
    • Cancel
Reply
  • BaaB
    BaaB over 9 years ago

    Hi,

    The method uses Outputs->To Be Saved->Save OP Parameters works but how about if I want to save more parameters of a component at the same time (for example, ron, rout,...) or save all operating point parameters?

    • Cancel
    • Vote Up 0 Vote Down
    • Cancel
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.

© 2025 Cadence Design Systems, Inc. All Rights Reserved.

  • Terms of Use
  • Privacy
  • Cookie Policy
  • US Trademarks
  • Do Not Sell or Share My Personal Information