[ibis-interconn] Re: Sparse Touchstone Proposal, with some more thought pu into it
- From: "Mirmak, Michael" <michael.mirmak@xxxxxxxxx>
- To: Walter Katz <wkatz@xxxxxxxxxx>, IBIS-Interconnect <ibis-interconn@xxxxxxxxxxxxx>
- Date: Mon, 20 Jul 2009 16:26:19 -0600
In as much as "Framis" is a neologism it may save a lot of argument. :)
Perhaps I am a bit obtuse, but fundamentally, my objection has been to the word
"function" in this context. To my math-avoiding mind, a function is any
expression containing an equals sign and one or more variables. Touchstone
files contain no expressions or equations but only values or coefficients.
Therefore, no functions are involved.
Awaiting a deluge of corrections...
- MM
From: ibis-interconn-bounce@xxxxxxxxxxxxx
[mailto:ibis-interconn-bounce@xxxxxxxxxxxxx] On Behalf Of Walter Katz
Sent: Saturday, July 18, 2009 6:32 PM
To: IBIS-Interconnect
Subject: [ibis-interconn] Sparse Touchstone Proposal, with some more thought pu
into it
All,
I think we can all agree that an Sij (imaginary number as a list of sampled
frequencies) is a numerical approximation of a Transfer Function. I would like
to name this a "Framis".
Here is a BNF an enhancements to Touchstone to handle Sparse Matrix data that
should satisfy all of the issues raise in the past several meetings.
[Number of Unique Framis's] <number of unique framis's>
{Framis Names]
1 <framis name>
2 <framis name>
...
<number of unique framis's> <frames name>
{End Framis Names]
[Sparse Framis Data]
<frames name> : (<row,column>) (<row,column>) (<row,column>) (<row,column>) ...
<frames name> : (<row,column>) (<row,column>) (<row,column>) (<row,column>) ...
(<row,column>) (<row,column>) (<row,column>)
(<row,column>) ...
< frames name> : (<row,column>) (<row,column>) (<row,column>) (<row,column>) ...
[End Sparse Framis Data]
The actual network data will have at each frequency <number of unique framis's>
imaginary numbers.
[Framis Names] section is optional, the default <framis name> of any Framis is
its' <framis number>. A <framis name> can consists of any legal IBIS
character, except ":" is not allowed as a Framis name.
Walter
Walter Katz
Chief Scientist
Signal Integrity Software, Inc.
wkatz@xxxxxxxxxx
303.449-2308
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