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Other CAD Tools >> Physical Verification, Extraction and Analysis >> Extranct coupled caps using xCalibre
https://designers-guide.org/forum/YaBB.pl?num=1147758893

Message started by ywguo on May 15^th, 2006, 10:54pm

Title: Extranct coupled caps using xCalibre
Post by ywguo on May 15^th, 2006, 10:54pm

Hi,

Now MIM caps are replaced by the lateral flux caps more and more. So I draw a lateral flux cap made of Metal 2 ~ Metal 6. I need extract coupled caps using xCalibre. But the extracted netlist contains caps from both nodes to ground only. How do I extract coupled caps using xCalibre?

Best regards,
Yawei

Title: Re: Extranct coupled caps using xCalibre
Post by bernd on May 16^th, 2006, 1:03am

I haven't used Calibre as extraction tool for a long time,
but in the PEX GUI there is under 'Outputs' the
option 'Extract Type' which let you
define RCC == Distributed RC + coupling caps
Which must be the command line option
calibre -xrc -rcc

Oops I realized that my suggestions is for Calibre xRC
not xCalibre, for what you initially were asking.

I don't know if you can extract coupled Cs with xCalibre,
may be you have to upgrade.

Bernd

Title: Re: Extract coupled caps using xCalibre
Post by ywguo on May 16^th, 2006, 7:28pm

Bernd,

I extracted the coupled caps successfully using your method. Thank you. But it is a netlist of distributed caps. I have to sum all distributed capacitances. Any method to extract a lumped C coupled between two nodes?

Thanks
Yawei

Title: Re: Extranct coupled caps using xCalibre
Post by bernd on May 17^th, 2006, 5:27am

I think it's only possible to have a distribute RC extraction or
a lumped C only extraction with Calibre, where lumped always is
decoupled.

But as I said it's a while since I worked with Calibre for
extraction.

If someone might know it better and I'm wrong please correct me.

Bernd