RE: [IBIS-Users] How is the switching edge response implemented in IBIS

From: Muranyi, Arpad <Arpad_Muranyi@mentor.com>
Date: Tue Apr 19 2011 - 21:33:51 PDT

Yuangcheng,

 

The input to an IBIS model is like a digital signal.

It doesn't matter what its edge rate is, when it

crosses the threshold of the input logic, it will

start the [Ramp] or the V-t waveforms. This threshold

value is not an IBIS parameter, so you have to check

how your tool works with it.

 

I hope this answers your question.

 

Arpad

=======================================================

 

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On
Behalf Of ji xiao
Sent: Tuesday, April 19, 2011 10:43 PM
To: ibis-users
Subject: [IBIS-Users] How is the switching edge response implemented in
IBIS

 

Dear Sir/Madam,
As I know, IBIS model has a VT table described the dynamic response of a
buffer for the fastest switching edge.
However, if the input pulse has a quite long rise/fall time (much slower
than its maximum switching rate), how is the IBIS model interpolate the
response during the rise/fall period?
Thanks for your help!

Regards,
Yuancheng

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Received on Tue Apr 19 21:34:16 2011

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