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Steven M Brown writes:
 > I am still using 7.1 and am having trouble extracting the resistances for
 > the attached file.
 > 
 > The problem is summarized as this:
 > There is an external input node which is connected to a resistor (a long
 > poly line). The other end of the resistor is wire-or'ed with a feedback
 > resistor. When Magic extracts this construct, it merges the nodes.
 > 
 > Even with resistor extraction, the external input node is not shown to
 > have a resistor, but rather seems to drive the feedback path directly. The
 > feedback resistor is the only one that Magic's resistor extractor appears
 > to like. It may be more accurate to say that it does not like the external
 > input, rather than saying that it likes the feedback.
 > 
 > I would like there to be a way to keep the resistor on the input node. Any
 > suggestions for a fix or work-around would be greatly appreciated.
 > 

hi why don't you use 'pseudo-resistor' layers, to designate your
resistors and have them extracted as 'resistor devices' during normal
';extract' (that you will have to edit after 'ext2spice', before
running spice), see the example

 ftp://ftp.isi.edu/pub/sondeen/magic/new/beta/examples/SCNA.00.resistors.*

warning: you'll have to read the README and CHANGELOG files to figure
out how to use that style of techfile

 ftp://ftp.isi.edu/pub/sondeen/magic/new/README
 ftp://ftp.isi.edu/pub/sondeen/magic/new/beta/CHANGELOG

/jeff

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