[IBIS] Re: [IBIS-Users] Simulating IBIS at the maximum frequency

Gowtham

Since time is relative in IBIS model simulations, what you do is to 
normalize the V/T table timing, by shifting the slower corner curves 
back towards zero.  Essentially, you remove any leading static values 
from the curves, prior to the edge transitions.

Scott


Gowtham M wrote:
> Hello,
>
> How do we ensure that IBIS model can be correctly simulated at the 
> highest possible frequency? Suppose, I have a buffer which is expected 
> to work at 100MHz. Hence, the VT table should be at most 1 / ( 2 * 
> 100M ) = 5ns wide.
>
> If the buffer is designed such that it can just meet this requirement 
> in min (slow) corner. The problem that I am facing is that I cannot 
> represent all of typ/min/max transitions within this window of 5ns 
> because of variations in buffer delay across corners.
>
> How do I create an IBIS model that can be correctly simulated at 
> 100MHz in such cases?
>
> Thanks for your help.
>
> Gowtham
>

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Scott McMorrow
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