[ibis-macro] Re: AMI Corner, and IBIS C_Comp, one more time
- From: "Bob Ross" <bob@xxxxxxxxxxxxx>
- To: <wkatz@xxxxxxxxxx>, "'IBIS-ATM'" <ibis-macro@xxxxxxxxxxxxx>
- Date: Wed, 12 Oct 2011 08:42:22 -0700
Walter:
I support this approach. This covers the existing situation and also the
potential addition of [C Comp Corner].
Bob
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Walter Katz
Sent: Wednesday, October 12, 2011 8:29 AM
To: IBIS-ATM
Subject: [ibis-macro] AMI Corner, and IBIS C_Comp, one more time
All,
I think AMI format Corner is well understood, although one could change the
following lines:
| Note that in the context of Algorithmic Model for type 'Corner', <slow
| value> and <fast value> align implicitly to slow and fast corners, and
| <slow value> does not have to be less than <fast value>. For type 'Range'
| and 'Increment', <min value>, <max value> does not imply slow and fast
| corners.
To say,
Note that in the context of Algorithmic Model for format Corner, <typ value>
<slow value> and <fast value> shall be the values used when the IBIS Analog
Model that is being used to generate the Impulse Response of the channel
shall use the IBIS analog model that corresponds to the derivation methods
as described for typical, slow-weak and fast-strong respectively in section
9 of IBIS.
For C_comp (where C_Comp_Used is the value used in the simulation):
. If an IBIS model has just C_comp the User/EDA tool shall choose a
value of C_Comp_Used from the values of C_comp when simulating typical,
slow-weak, or fast-strong IV and VT data. Although it is common practice
(but not required) to use the min value of C_comp for fast-strong IV and VT
data and C_comp max for slow-weak IV and VT data.
. If a model has C_comp and C_comp_corner, then the User/EDA tool
shall choose either a value of C_Comp_Used from the values of C_comp in
accordance with the previous paragraph, or use the typ, min, max value of
C_comp_corner when simulating typical, slow-weak, or fast-strong IV and VT
data respectively.
This defines a default method of defining C_Comp_Used when C_comp_corner is
not defined and when C_comp_corner is defined. C_comp_corner is defined the
User can direct the EDA tool to use the values of C_comp_corner that
correspond to the derivation methods of the IV and VT tables, or use the
values of C_comp either correlated or independent of the IV and VT tables
used.
Walter
Walter Katz
wkatz@xxxxxxxxxx
Phone 303.449-2308
Mobile 720.333-1107
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