Re: Bird 28.2 - Comments and Suggestions

Hello Dileep:
     Thanks for taking the time to review the Bird and
offor your comments and suggestions. My answers are below,
prefixed by >>>.

             Best regards,
             Stephen Peters
             Intel Corp.

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On Tue, 22 Aug, Dileep Divekar at Contec wrote

Editorial Comment:
The character used to separate the section information
is a slash (/) and not a backslash (\) as mentioned.

>>> Will fix

Comment:
It would be helpful to clarify if ALL of L/R/C have
to be specified. That is, is any of the following allowed?
/Len=1.3 L=1.3n/
/Len=2.5 L=3n C=0 R=0/

>>> Paragraph three of the usage rules states
>>> the following: "Specifying a length or L/R/C value
>>> of zero is allowed." Paragraph C) under Legal
>>> Subparameter Combinations does say the 'any combination'
>>> of L, R and C are allowed, but I will clarify the
>>> statement to indicate that all three are not required
>>> to be specified.

Suggestion:
I think the off diagonal entries in the C matrix
should be specified as negative numbers, if they
are indeed negative, as they are in this case,
instead of making them positive.

>>> When I looked at the acadimic and technical
>>> papers on the subject (not to mention the software
>>> we use in house) the off-diagonal elements are
>>> always positive quanities. For what ever reason
>>> this seems to be the convention and I don't see a need
>>> to do it differently.

Suggestion:
For the sake of completeness and generality,
the specification should allow an optional G
specification which is a conductance in parallel
with C, similar to R in series with L.

>>> Good point. I did not include a 'G' parameter
>>> because the current IBIS 2.1 Matrix descriptions
>>> do not include one and I was trying to limit the
>>> scope of the bird. If the committe did want
>>> to add the a conductance parameter it could be
>>> in a seperate proposal.
>>>
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Dileep Divekar
Contec CAE, Ltd.
2188 Bering Drive
San Jose, CA 95131

Phone - (408)-434-6767 x 126
Fax - (408)-434-6884
Email - dileep@contec.com
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Received on Thu Aug 24 09:20:31 1995