Subject: RE: [IBIS-Users] [Fwd: Non_monotonous data in IBIS models]
From: Ingraham, Andrew (Andrew.Ingraham@hp.com)
Date: Fri Aug 16 2002 - 08:02:51 PDT
Non-monotonicity is normal for a bidirectional buffer and happens as a consequence of subtracting the clamp currents from the total currents to generate the pullup and pulldown current tables. In the region where the clamps are effective, the pullup and pulldown currents frequently have non-monotonic behavior.
If ibischk were clever enough to sum the currents back together before checking for monotonicity, most of these warnings would go away.
Anyway, IBIS doesn't care if the data is monotonic. It's just that some simulators that use IBIS data might be affected. Technically, IBIS model can have non-monotonic data.
Regards,
Andy
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