[SI-LIST] Re: What frequency are IBIS models good to?
- From: "Ummalaneni, Venu Babu (Venu)" <venubabu@xxxxxxxxx>
- To: <arpad.muranyi@xxxxxxxxx>, "si-list" <si-list@xxxxxxxxxxxxx>
- Date: Wed, 15 Sep 2004 11:53:26 +0530
>hich are connected to the respective reference nodes that the
corresponding IV curves are connected >to. So if the pullup IV curve is
connected to the pullup reference, it can have its parallel=20
>C_comp_pullup, and so on. This feature comes handy when someone is
interested in power delivery=20
>simulations.
>One of the biggest drawback of C_comp for very high speed simulations
is that it is a single and=20
>constant number (aside from the 4-way splitting mentioned above).
I.e., you can't=3D20 describe the >voltage or frequency dependence. For
this reason, the IBIS model maker has to pick the best value >for C_comp
that is valid for the frequency of operation and the signaling levels of
the buffer. >This can be done, but may not be sufficient in every
situation.
>Arpad Muranyi
Muryani,
Do you mean to say this option of '4-way splitting mentioned above' is
available in latest IBIS versions?
Regards,
Venu Babu.
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