I tried to understand the way IBIS package parameters (Rpkg, Cpkg, Lpkg) are used in HyperLynx. I simulated the following circuits:
In the IBIS model assigned to the U1.1 buffer Rpkg/Cpkg/Lpkg are set to 0.0
To the U13.1 buffer the same model was assigned but its pkg parameters were the following: Rpkg = 0.9, Cpkg = 4pF, Lpkg = 3nH
I expected to get similar waveforms but the waveforms appeared to be markedly different:
Why the waveforms are so different?
Is it correct to expect the waveformes to be similar?
How IBIS packaged parameters are utilized?
What is an equivalent circuit of the U13.1 buffer (IBIS model with defined pkg parameters)?