[SI-LIST] Re: (no subject)
- From: "Ross, Bob" <bob_ross@xxxxxxxxxxx>
- To: rukf@xxxxxxxxxxx
- Date: Fri, 07 Jun 2002 11:27:09 -0700
Paul:
There is a bug in the ibischk3 code used by the Visual IBIS Editor
concerning the reported percentage values. This is being fixed.
However, the ERROR is correct and indicates that the Waveform table
amplitudes do not match up with the I-V tables (above a 10% mismatch)
for the given load. (The file and complete set of messages needs to
be examined to be eliminate other possible factors such as strong
non-monotonic data.)
Some vendors choose to rescale the IBIS model data to make it work,
while others will reject the model. The best solution is to get
a good model with consistent information.
Bob Ross
Mentor Graphics
Paul Fernando wrote:
>
> Does anyone know what this means & how to resolve it? Its produced when I
> check an ibs file on Innoveda's Visual IBIS editor.
> Thanks.
> Paul
>
> ERROR - Model driver: The [Rising Waveform]
> with [R_fixture]=500 Ohms and [V_fixture]=0V
> has TYP column DC endpoints of 0.01V and 1.20v, but
> an equivalent load applied to the model's I-V tables yields
> different voltages ( 0.00V and 1.45V),
> a difference of 54208654.45% and 17.00%, respectively.
>
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