Spectre to create IBIS

Dear IBIS users,

When I try to use spectre to create IBIS models, I met a problem:

If there are current curves like Power-clamp or Pull-down, when I check model file, it always said like:
pull-down has Decreasing Current or so.

I observed the testbench created for that curve and found that in Spectre testbench, it will record all terminal currents of a component, so in output file there will be two set of currents values of voltage source, one is positive and one is negetive or vice versa. Unfortunately, IBIS creation will use the wrong set of current values and so the curve will be wrong. Since IBIS command file will create the test bench automatically, I can't control it.

I wonder if you have ever used spectre for IBIS model or have some good idea.

Thank you for your time.

Roy
Received on Tue Sep 7 12:23:28 1999