Hi Chetana, I think there is no relation between Pullup/Pulldown IV curves and Rfixture Rfixture is , generally, taken to be the transmission line characteristics impedance to which the buffer will be connected. It affects rising and falling waveforms The customer should be a ware of the mismatch between the buffer output impedance and the 50 Ohms line but this is not related to IBIS modeling Regards, Yasser Chetana Raghuwanshi wrote: > Hello All, > > I am generating IBIS Models ( based on 2.0 Format) for a bidirectional > IO cell with output impedence of 32 Ohms. > > Customer specification is to use Rfixture/Rload value of 50 Ohms for > IBIS Models. > > But when I see my pullup and pulldown I-V curves, the loadline > corresponds to the Resistive load of 32 Ohms which is nothing but the > output impedence of driver in my Bidir cell. > > I think that the pullup and pulldown I-V curves should correspond to > Resistive Load of 50 Ohms. Am I correct in assuming this ? > > Or is it expected that irrespective of the value of Rfixture / Rload > pullup and pulldown curves should correspond to Zout of driver ? > > Thanks in Advance > > Best Regards > > Chetana > > > -- > This message has been scanned for viruses and > dangerous content by MailScanner <http://www.mailscanner.info/>, and is > believed to be clean. > -- Thank you and Best Regards, Yasser Sabry ------------------------------------------- Yasser Mohammed Sabry Device Modeling Team Analog/Mixed Signal - DSM Division Mentor Graphics Egypt Tel: (+202) 416 3613 Mob: (+2010) 1834833 Fax: (+202) 418 6945 E-mail: yasser_sabry@mentor.com ------------------------------------------- -- 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 majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis <optional e-mail address, if different> | subscribe ibis-users <optional e-mail address, if different> | unsubscribe ibis <optional e-mail address, if different> | unsubscribe ibis-users <optional e-mail address, if different> | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993Received on Thu Feb 7 06:58:07 2008
This archive was generated by hypermail 2.1.8 : Thu Feb 07 2008 - 06:58:23 PST