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 Extracting Coupling Capacitance between unconnected cells 

Last post Thu, Nov 20 2008 9:55 PM by Sirrius. 0 replies.
Started by Sirrius 20 Nov 2008 09:55 PM. Topic has 0 replies and 860 views
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  • Thu, Nov 20 2008 9:55 PM

    • Sirrius
    • Top 500 Contributor
    • Joined on Wed, Aug 13 2008
    • Posts 22
    • Points 275
    Extracting Coupling Capacitance between unconnected cells Reply

     Hi All,

     I am trying to figure out the impact (in terms of measurable delays in static timing analysis) do unconnected (standard) cells have on each other. To start with, I have a design, and I am inserting additional ('spare') cells, and leaving them unconnected.

    Next, I extract RC, and run timing analysis (report_timing ...)

    I do not see any changes in the timing values reported. 

    Is it possible to extract this kind of information during static timing analysis stage? I do not have access to Fire-n-Ice extractor ( I get an error mentioning that an executable was not found).

    If extracting timing variations due to coupling capacitances is possible during the static timing analysis phase, I will appreciate, if someone can please show me where (and how) to start.

     

    Thanks a lot for your time!

     

    Sirrius

    • Post Points: 5
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Started by Sirrius at 20 Nov 2008 09:55 PM. Topic has 0 replies.