Hi Paul: I wouldn't worry to much about the difference on the low end -- between 0.00 and 0.01V (although it's an error in the Rising Waveform table, which should start at 0.00V); but the difference between the Pull-up (VI) table at 1.45V and the Rising Waveform at 1.20V is serious, and an error on the part of the model developer. The IBIS Check utility, which the Visual IBIS Editor incorporates, exists for exactly this purpose: to check for inconsistencies between the various tables in an IBIS model (against specified loads) and for syntax violations. The model developer needs to go back to the original SPICE data on that buffer, and do it right. If you or the chip vendor want help doing this, there's an IBIS development quote form on my company's Website (link below). Also, we're offering onsite IBIS development classes -- IBIS 101, 501 and 505 -- that are not currently on the site, but that I can tell you more about if you e-mail me. Best Regards, Bill Hargin Direct: 425-702-0744 Fax: 425-702-0305 Cognition Consulting Electronic Design Software and Consulting http://www.CognitionConsulting.com > -----Original Message----- > From: si-list-bounce@xxxxxxxxxxxxx > [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Paul Fernando > Sent: Friday, June 07, 2002 10:21 AM > To: si-list@xxxxxxxxxxxxx > Subject: [SI-LIST] (no subject) > > > Does anyone know what this means & how to resolve it? Its > produced when I check an ibs file on Innoveda's Visual IBIS editor. > Thanks. > Paul > > ERROR - Model driver: The [Rising Waveform] > with [R_fixture]=500 Ohms and [V_fixture]=0V > has TYP column DC endpoints of 0.01V and 1.20v, but > an equivalent load applied to the model's I-V tables yields > different voltages ( 0.00V and 1.45V), > a difference of 54208654.45% and 17.00%, respectively. > > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > List archives are viewable at: > //www.freelists.org/archives/si-list > or at our remote archives: > http://groups.yahoo.com/group/si-list/messages > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu