• 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. Running corners in ADEXL and calculating output express...

Stats

  • Locked Locked
  • Replies 0
  • Subscribers 125
  • Views 14005
  • 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

Running corners in ADEXL and calculating output expressions

Chevelle70
Chevelle70 over 9 years ago

Hello,

I'm running simulations across corners using ADEXL and defined a few output expressions in ADE XL Test Editor. I'm saving the "vds" and "vdast" of some transistors in the "tran" simulations using "save" statements in a file (filename.scs) defined as a "Definition File" under "Simulation File" of ADE XL Test Editor.

First observation:

Some of the transistors, which I need to save their vds and vdsat, are inside the elements of an array of these elements. To save the vds and vdsat of these devices, I checked the netlist generated by ADEXL to see how they appear in it. To my surprise, these array elements sometimes show up in a form as "save I124.I25.I1_4.Mn10:vds" and some other times as "save I124.I25.I1\<4\>.Mn10:vds". To resolve this, I put two expressions in either form for each array element's parameter in filename.scs. I am wondering why this happens.

Second observation:

I have defined output expressions in the following forms using ADE XL Test Editor:

value(v("I124.I25.I1_4.Mn11:vdsat" ?result "tran") Ts)

value(v("I124.I4.Mn11:vdsat" ?result "tran") (Ts + (0.8 * Tck)))

Variables Ts and Tck are defined as Design Variables in Corners Setup window of ADEXL.

If I select only one corner and run one simulation, the expressions are correctly calculated. However, if I select two or more corners and run simulations, I receive evaluation error for some (or all) of the expressions in both formats mentioned above. Would you please help me resolve this issue?

Thank you,

-Alireza

  • 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.

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

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