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Other CAD Tools >> Physical Verification, Extraction and Analysis >> min. Capsize not settable for Assura RCX
https://designers-guide.org/forum/YaBB.pl?num=1202908356

Message started by vivkr on Feb 13^th, 2008, 5:12am

Title: min. Capsize not settable for Assura RCX
Post by vivkr on Feb 13^th, 2008, 5:12am

Hi,

I have noticed this for a long while now that the option minC in Assura RCX is simply a dummy. You can set it as high as you like, and
still you get caps a 100x - 1000x smaller than the chosen minC. This is very annoying if one wants only a simple netlist with say min.
parasitic cap > 10 fF or say 100 fF and one gets all these caps in the aF range.

Is there any way to get around this problem?

Thanks & Regards
Vivek

Title: Re: min. Capsize not settable for Assura RCX
Post by ACWWong on Feb 13^th, 2008, 5:33am

I have suffered this in the past. The way I cope with it is to filter the netlist to remove tiny capacitors. I use regular expression replace using nedit (or any editor which understands regular expressions).

So putting in the following regular expression into nedit replace form will remove all sub 1fF (i.e. measured in aF) caps:

^.*e-18\n

you could also script a simular filter tool in say perl or similar.

cheers
aw

Title: Re: min. Capsize not settable for Assura RCX
Post by vivkr on Feb 13^th, 2008, 10:53pm

Thanks a lot. I will do it this way then. I use VI. Interesting to know that nedit also supports regular expressions.

Regards
Vivek