Subject: Re: [IBIS-Users] rising and falling wave forms in IBIS files
From: Ross, Bob (bob_ross@mentorg.com)
Date: Tue May 07 2002 - 16:22:24 PDT
Hello Gerd:
IBIS permits using just a RAMP or even one waveform
per edge. The EDA tools should handle these cases.
In most cases two waveforms are recommended. In some
cases for terminated technologies or for open_* devices,
one waveform gives excellent results for the operating
regions of interest.
Bob Ross
Mentor Graphics
"Baumann, Hans-Gerhard" wrote:
>
> Hi,
> from IBIS class I learned that in order to model
> rising and falling wave forms it is required to provide
> two plots for each transition. One with load resistor
> to VDD and one with load resistor to GND.
>
> The IBIS models I found on the WEB mostly provide only
> one plot for each transition. Can someone point me to a
> model from that I could learn how to setup two rising
> and two falling wave forms with corresponding load
> within an IBIS model ?
>
> Thanks and Best Regards
> Gerd Baumann
>
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