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The Designer's Guide Community Forum › Other CAD Tools › Physical Verification, Extraction and Analysis › Calibre L extracton
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Calibre L extracton (Read 3596 times)
R. Zakai
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Calibre L extracton
Mar 24th, 2008, 4:33pm  
Hello,
Does anyone know what "ground return path" in the context of inductance extraction means? I am using Calibre to extract Ls and need to specify ground return path. I can't quite find an explanation for what it means. Why can it not calculate the self inductance of a wire like asitic  does without any reference to return path.
I'd really appreciate any comments on this issue.
Thanks,
R. Zakai
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9patch
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Re: Calibre L extracton
Reply #1 - May 7th, 2008, 4:18pm  
That's because Calibre uses loop inductance to calculate inductance. You would need to set the power and ground names to be all of the nets that you have for power and ground, for example, VDD and VSS. If you don't want to use loop inductance, I believe that you can use the SVRF statement PEX DIFFERENTIAL PAIR, which will do partial inductance.
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