Date: Tue Jul 26 2011 - 17:29:06 PDT
Which one best matches the stimulus frequency? If it is the max curve (red),
then I would suspect the typ and min V/T curves have very long łtails˛ and
the simulator is riding them out until they finish, before responding to the
next opposing stimulus edge. Note that when the typ and min do trigger they
have a fixed time relationship to each other and to the max. I think they
are just skipping some edges because they arenąt yet ready.
Mike LaBonte
On 7/26/11 7:25 PM, "Anand Ramalingam" <anandr@Magma-DA.COM> wrote:
> Hi ,
>
> I am simulating IBIS model using hspice. The problem I have is that the curves
> generated by the max corner has a different time period compared to the ones
> generated by typ/min curves. The ibis model on visual inspection seems good
> (curves follow the expected pattern). The spice script to run the ibis model
> just differ in the vdd values. I am not sure why I see a difference in time
> period across the corners (min (green)/typ (yellow) nearly have the same time
> period while max (red) is six times faster)
>
>
>
>
> Thanks
> Anand
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