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From: Philippe Pouliquen (philippe AT alpha DOT ece.jhu.edu)
Date: Wed Oct 22 2003 - 17:41:57 EDT

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    On Wed, 22 Oct 2003, R. Timothy Edwards wrote:
>
> I don't really like the idea of depending on label tags for things that
> magic ought to figure out by itself;  in particular, it should not be
> necessary to depend on "extresist" to pick out which resistors were
> planned in the design and which weren't.

I agree (is someone keeping track of the rare times I agree with Tim? :-).

I think the process should be the other way around: once you set the
resistance threshold, Magic should extract any resistor that exceeds this
threshold UNLESS it is marked in the layout as being ignorable.

The odd situation that comes to mind is as follows:  Suppose you have a
critical resistor in your design that is not very large.  In order to get
it extracted, you have to set a low resistance threshold.  But then you
get a bunch of other innocuous resistors which increase the size of the
Spice deck and lengthen your simulation time.

Philippe Pouliquen
The Johns Hopkins University

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