[SI-LIST] Re: PV/PT Tables IBIS
- From: "Muranyi, Arpad" <arpad.muranyi@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx,"'ibis-users@xxxxxxx'" <ibis-users@xxxxxxx>
- Date: Mon, 21 Jan 2002 08:16:08 -0800
Jason,
The resistor value should be a value close to the transmission line
impedance the buffer is designed to drive. This is how the model
is most accurate. Most algorithms use these waveforms as if they
were a percentage vs. time table, scaling the IV curves with respect
to time. So the actual voltage values are not as important as some
may think.
Arpad Muranyi
Intel Corporation
====================================================================
-----Original Message-----
From: Pritchard, Jason [mailto:jasonp@xxxxxxxxxxxxxxxxx]
Sent: Monday, January 21, 2002 7:59 AM
To: si-list@xxxxxxxxxxxxx; 'ibis-users@xxxxxxx'
Subject: [SI-LIST] PV/PT Tables IBIS
Hello all,
When creating an IBIS model, how does the test resistor chosen to create the
PV/PT tables affect the rising and falling waveforms in simulation? If i use
a 500 ohm resistor vs. a 50 ohm resistor, the pv/pt tables generated will be
much different. What is the simulator doing with this data, and what are the
correct values to use when creating an IBIS or XTK model?
Thanks,
Jason
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