All,
I think that IBIS should simply state:
All voltage measurements at a buffer shall be made relative to a "Local
Ground" node.
The "Local Ground" is defined as any Rail Terminal that has a value of 0.0
volts in DUT conditions.
* If there is no Rail Terminal that has a value of 0.0 volts in
DUT conditions, then
o A component pin rail signal name that has a 0.0V DUT value, then that
signal name shall be "Local Ground".
* If there is no component pin that has a DUT value of 0.0V, then
simulator Node 0 shall be the reference voltage for all voltage
measurements.
Walter
Walter Katz
<mailto:wkatz@xxxxxxxxxx> wkatz@xxxxxxxxxx
Phone 303.449-2308
Mobile 303.335-6156