Hi, I am trying to validate an IBIS 5.1 model generated for DDR3 with ISSO_PU/PD and Composite Current data. The V-T and I-T data is not clipped in order to capture pre-driver current better and the I-T table has 1000 points. When I tried to do a transient analysis for validation, SPICE and IBIS V-T waveforms are matching at the DDR3 frequency, but IBIS I-T curves are getting truncated at the rise and fall transitions and doesnot correlate well with SPICE. The pre-driver current is being lost. When the frequency is reduced, there is good SPICE - IBIS matching for I-T. Is this issue known or is it an issue in the IBIS model? I have read in http://www.eda.org/ibis/summits/may11/m051111.pdf that "adding [Composite Current] data to the model reduced the valid switching rate of the model." Is the above issue related to this? Thanks. Regards, Rinsha -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail mikelabonte@eda-stds.org |or ibis-request@eda-stds.org | |IBIS reflector archives exist under: | | http://www.eda-stds.org/ibis/email_archive/ Recent | http://www.eda-stds.org/ibis/users_archive/ Recent | http://www.eda-stds.org/ibis/email/ E-mail since 1993Received on Fri Mar 8 08:02:13 2013
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