Package Parasitics continued

Hello All,

Responding to Eric Bracken again, he writes:
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I propose the same thing; but I suggest we represent the matrices as a
SPICE deck. This is a well-known, industry standard format that
everyone understands. The symmetry is implicit in the SPICE. The
"banded" (or more generally, "sparse") nature of the matrix will be
there if you don't specify the coupling between far-off elements.
Finally, the SPICE provides flexibility to describe discontinuities
between bond wires, lead frame and pins.
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However, my point is that:
 1) RLGC Matricies are much easier to manipulate, for example to
    compare coupling strengths.
 2) RLGC Matricies are easily translated into equivalent SPICE decks.
 3) It is difficult to make the translation from SPICE to
    RLGC matricies since that would entail parsing the SPICE deck,
    and checking to make sure no other elements were present.

Of course SPICE is more generic, but I think that generality is not
required here.

Chris Reid
cer@cadence.com
Received on Fri Oct 1 11:59:02 1993