RE: accuracy BIRD

Fred,

There is really no such thing as "no load answer". The 50 Ohm resistor was
invented because the transmission lines look like a resistor for the time
duration while the wave is traveling down the line and back. So the driver
really never drives a "no load"...

Arpad
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Actually there is always a load on the IBIS models I have seen. The load
is typically 50 ohms to gnd or vcc. Because of this the simulation
vendors must extrapolate the no load answer. The DC loads are presumably
put there to determine turn off and turn on currents. One other comment.
The load is always a complex impedance. This is because c_comp is
required.

Best Regards,

--
Fred Balistreri
fred@apsimtech.com
http://www.apsimtech.com