[ibis-macro] IBIS is very clear about Typ, Slow-Weak, and Fast-Strong in section 9.
- From: "Walter Katz" <wkatz@xxxxxxxxxx>
- To: "IBIS-ATM" <ibis-macro@xxxxxxxxxxxxx>
- Date: Tue, 4 Oct 2011 20:25:08 -0400 (EDT)
All,
Section 9 of IBIS clearly defines Typ, Slow-Weak and Fast-Strong
IBIS states:
It is permissible to use slow, weak components or models to derive the
data for the "min" column, and to use fast, strong components or models to
derive the data in the "max" columns under the corresponding voltage and
temperature derating conditions for these columns.
And
The voltage and temperature keywords and optionally the process models
control the conditions that define the "typ", "min", and "max" column
entries for all I-V table keywords [Pulldown], [Pullup], [GND Clamp], and
[POWER Clamp]; all [Ramp] subparameters dV/dt_r and dV/dt_f; and all
waveform table keywords and subparameters [Rising Waveform], [Falling
Waveform], V_fixture, V_fixture_min, and V_fixture_max.
The words "permissible" and "optionally" are generally assumed by model
makers and model users that at least for [Voltage Range], and
[Temperature], IV Curves, VT Curves, and dV/dt all associate the Typ, Min,
and Max columns with Typ, Slow-Weak and Fast-Strong.
An AMI parameter with Format Corner simply states that its value to be
chosen by the EDA tool should correspond to the IBIS corner of the IBIS
analog model when generating the Impulse Response of the channel. This
what is meant by "in accordance" with corner chosen to do the simulations
by the EDA tool.
Since IBIS only defines Typ, Slow-Weak, and Fast-Strong, then the three
Format Corner values correspond to Typ, Slow-Weak, and Fast-Strong.
So if you want to replace the "in accordance" sentence with
The three values of an AMI Corner parameter value shall be chosen to
correspond to the IBIS corner of the IBIS analog model when generating the
Impulse Response of the channel.
Walter
Walter Katz
wkatz@xxxxxxxxxx
Phone 303.449-2308
Mobile 720.333-1107
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