( ESNUG 253 Item 11 ) ------------------------------------------- [10/4/96]
From: Atle.Haga@alcatel.no (Atle Haga)
Subject: Yikes! I Can't Resest "max_capacitance" Post-layout? Damn!
While receiving a post-layout netlist we usually get some/many design rule
violations depending on the design and the quality of the libraries.
Usually max_capacitance violations can be ignored if they're less than 150%
and you do not want to change the netlist more than necessary. It seems
Design Compiler is not capable of handling this problem since it will
try to remove *all* violations. It is not possible to increase the
max_capacitance value?!! (Does anyone not want this? Why?)
We managed by manipulating (subtracting) capacitance from the data in the
annotation-file. However, this is not our preferred design methodology!
Anyone else having other ways of solving this problem ?
- Atle Haga
Alcatel Telecom Norway
|
|
