Re: Connector spec swathing

Hello,

Chris is absolutely correct. We need an unamiguous method of
building an arbitrary submatrix from the connector swath. At
ICX we wrote a program that translates SPICE connector models
into full matrix models which our tool can use. This is a
difficult process and needs significant input from the user.
There are many cases with ambiguities, sometimes without even
one clearly right answer let alone the case where there might
be more than one right answer.

The problem is best illustrated by considering what the SI
tool must accoomplish. Given a particular situation to simulate
(which may include coupling to other nets) certain pins on each
component must be included in the simulation. If any two (or
more) of these pins are situated such that using the swath for
both of them results in an overlapping set of pins (but not
coincident) then what is the coupling matrix that should be used?

Chris Reid

Chris Rokusek wrote:
>
> Kellee & IBIS connector committee,
>
> The DAC IBIS meeting was one of the best I've attended...well done!
>
> I would like to request that the description of the "swath" matrix also
> describe how to properly construct a fully-coupled matrix from the swath
> matrix since there appears to be more than one "right" way to do it.
>
> It would also be nice if the parser itself could perform this algorithm so
> that a simulator may (if it so desires) just query the full matrix
> regardless of how it was specified (swath, full, sparse, ...).
>
> Best Regards,
>
> Chris Rokusek
> Innoveda
Received on Tue Jun 13 13:31:39 2000