[ibis-macro] BIRD-125: ISS as package-model
- From: Taranjit Kukal <kukal@xxxxxxxxxxx>
- To: IBIS-ATM <ibis-macro@xxxxxxxxxxxxx>
- Date: Thu, 13 Jan 2011 12:55:38 +0530
Hi Arpad,
The BIRD surely bridges a gap that was very important as almost every package
needs to be an s-parameter model at MGH.
However, it seems that the BIRD requires the user to always specify one
sub-circuit for the whole package. So, if the package had 8, 16, or 100 pins
then the user needs to provide a 16, 32, or 200 terminal subckt, respectively.
We always get package models as models for single pins or diff-pin(s). I think
we should extend the BIRD to include subcircuits per pin (and per-diff-pin) and
may be cover cases where several smaller sub circuits can be assigned to
subsets of the package pins.
Another minor thing is that we are forcing the user to wrap s-parameter files
into ISS - Not sure if the syntax should allow direct s-parameter instantiation.
This is a surely not a big issue.
rgds
..kukal
Taranjit Kukal | Product Engineering Architect
P: 91 120 3984000 www.cadence.com<http://www.cadence.com/>
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