• 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. Measurement of Duty Cycle Distortion (DCD) using OCEAN

Stats

  • Locked Locked
  • Replies 2
  • Subscribers 125
  • Views 14848
  • 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

Measurement of Duty Cycle Distortion (DCD) using OCEAN

LeJonT
LeJonT over 13 years ago

Hi,

Is there any suggestive method for measuring Duty Cycle Distortion (DCD) by Cadence?

I could see different suggestions over the Internet on this; for example, feeding the design with a clock-pulse and finding the difference between time periods of clock cycles. What would Cadence suggest?

Since this is a generic question, not sure what other information is required to be posted here. Any help would be appreciated. Though I'm looking for help with OCEAN, suggestions on Measurement methodology for DCD itself might help to get it done.

  • Cancel
  • Andrew Beckett
    Andrew Beckett over 13 years ago

    IC61X versions have a function period_jitter which will capture the variation in one period to the next, but not the variation in duty cycle. To do that you'd probably need to write something which actually tracked the positive and negative threshold crossings and computed the variation yourself (i.e. a bit of SKILL). Exactly what you would do rather depends on precisely what you're trying to measure.

    Sounds as if it is something that could be generally useful though, so you might want to contact customer support to add this as an enhancement to the calculator functions.

    Regards,

    Andrew.

    • Cancel
    • Vote Up 0 Vote Down
    • Cancel
  • LeJonT
    LeJonT over 13 years ago

    Thanks Andrew!

    While working on this, I've raised a request for the enhancement as well (Service Request #42762532).

    Regards, Leo

    • Cancel
    • Vote Up 0 Vote Down
    • 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