Fabio, You will have to make one [Model] and associate that model with both pins using the [Diff Pin] keyword, and the tools will provide the correct stimulus to both model instances for you automatically. Arpad ================================================= ________________________________ From: Fabio BRINA [mailto:fabio.brina@st.com] Sent: Wednesday, May 21, 2008 2:00 AM To: Muranyi, Arpad; ibis-users@server.eda.org; ibis@server.eda.org Subject: RE: [IBIS] [IBIS-Users] Differential Output terminals Thank you Arpad, so is a task of the tool to make the inversion of inverting Pin, clear, so I have only to characterize the non-inverting output (I haven't asymmetric structure). Thanks, Fabio ________________________________ From: owner-ibis@server.eda.org [mailto:owner-ibis@server.eda.org] On Behalf Of Muranyi, Arpad Sent: Monday, May 19, 2008 4:10 PM To: ibis-users@server.eda.org; ibis@server.eda.org Subject: RE: [IBIS] [IBIS-Users] Differential Output terminals Fabio, There is no reason to make two [Model]s with the same data in them for a differential pair. You might as well just have one [Model] and call it twice for the diff pair. The inversion will be taken care of automatically by the tool for you. The only reason you might need to consider two [Model]s is if the buffer has asymmetric characteristics between the two outputs in its behavior. Arpad ================================================= ________________________________ From: owner-ibis@server.eda.org [mailto:owner-ibis@server.eda.org] On Behalf Of Fabio BRINA Sent: Monday, May 19, 2008 7:22 AM To: ibis-users@server.eda.org; ibis@server.eda.org Subject: [IBIS] [IBIS-Users] Differential Output terminals Hello ibis experts, I'm in the modeling of a "fully differential driver" structure, do you think I have to consider the same model for both output terminals? (I see many differential model in this way) [Pin] ... 11 DOUT3- OUTMOD 12 DOUT3+ OUTMOD ... or is better to consider two model for the two output? [Pin] ... 11 DOUT3- OUTMINUS 12 DOUT3+ OUTPLUS ... (in this case the [Pulldown] table of OUTMINUS have the same points od [Pullup] table of OUTPLUS and viceversa?) Many thanks, Regards, Fabio Brina -- This message has been scanned for viruses and dangerous content by MailScanner <http://www.mailscanner.info/> , and is believed to be clean. -- This message has been scanned for viruses and dangerous content by MailScanner <http://www.mailscanner.info/> , and is believed to be clean. -- 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 Wed May 21 11:29:19 2008
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