[ibis-interconn] Re: Non-interconnect type sparse matrices
- From: "Walter Katz" <wkatz@xxxxxxxxxx>
- To: <ibis-interconn@xxxxxxxxxxxxx>
- Date: Wed, 10 Jun 2009 11:55:15 -0400
All,
I have absolutely not objection to generalizing sparse s-parameter matrices
to other then "S", and other then "Interconnect". I think the critical need
is for connector, package, and dimm interconnect, so I would hope that
generalizing Sparse matrices will not extend the time it will take to
develop and approve a specification.
Walter
-----Original Message-----
From: ibis-interconn-bounce@xxxxxxxxxxxxx
[mailto:ibis-interconn-bounce@xxxxxxxxxxxxx] On Behalf Of Dmitriev-Zdorov,
Vladimir
Sent: Wednesday, June 10, 2009 10:53 AM
To: ibis-interconn@xxxxxxxxxxxxx
Subject: [ibis-interconn] Re: Non-interconnect type sparse matrices
Hi All,
When thinking about sparse matrix representation for S/Y/Z parameters,
shouldn't we consider more possible cases than just interconnects?
Some cases of importance involving sparse/redundant matrices are NOT
interconnects.
For example, here is PDN (power distribution network) with two pairs of
power ports, Z-parameters (4x4 matrix):
Z = [ V1 V1 V2 V2
V1 V1 V2 V2
V2 V2 V3 V3
V2 V2 V3 V3 ];
Possible simple description:
[ports 4]
[VECTOR 3]
1 : (1,1) (1,2) (2,1) (2,2)
2 : (1,3) (1,4) (2,3) (2,4) (3,1) (3,2) (4,1) (4,2)
3 : (3,3) (3,4) (4,3) (4,4)
[begin data]
freq1 real(V1) imag(V1) real(V2) imag(V2) real(V3) imag(V3)
freq2 real(V1) imag(V1) real(V2) imag(V2) real(V3) imag(V3)
....
Note that using "vector" is a universal way to define smaller # of
components, suitable for all types of topologies, because it does not
imply any topological assumptions.
Vladimir
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