This look like that the parser doesn't check that the [Model] is used as a differential pair, and issues a warning regardless. Keep in mind that the same [Model] can be referenced as a single ended buffer as well as part of a differential pair. However, this is only a warning, and if you are aware of the rules that the vdiff value overrides the Vinh and Vinl parameters you can rest in piece that there is nothing wrong with your model. Arpad Muranyi ================================================================ -----Original Message----- From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of lee yang Sent: Friday, March 04, 2005 6:40 AM To: ibis-users@eda.org Subject: [IBIS-Users] Vinl and Vinh For Differential Input Model Hi IBIS experts, As far i as concern, the differential input does not base on the Vinl and Vinh to determine the voltage level but based on the difference between posite and negative pins. I am wondering that I got the warning if i did not put the vinl and vinh values for diffrentil LVDS input model in an IBIS file. Why should we put the values? And how can we determine the Vinl and Vinh values for LVDS or any other differential input standards (since we only talking about Vid and Vicm most of the time)? Thanks a lot. -Lee _________________________________________________________________ Get your mobile ringtones, operator logos and picture messages from MSN Mobile http://msn.smsfactory.no/ |------------------------------------------------------------------ |For help or to subscribe/unsubscribe, email majordomo@eda.org |with just 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 email a written request to ibis-request@eda.org. | |IBIS reflector archives exist under: | | http://www.eda.org/pub/ibis/email_archive/ Recent | http://www.eda.org/pub/ibis/users_archive/ Recent | http://www.eda.org/pub/ibis/email/ E-mail since 1993 |------------------------------------------------------------------ |For help or to subscribe/unsubscribe, email majordomo@eda.org |with just 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 email a written request to ibis-request@eda.org. | |IBIS reflector archives exist under: | | http://www.eda.org/pub/ibis/email_archive/ Recent | http://www.eda.org/pub/ibis/users_archive/ Recent | http://www.eda.org/pub/ibis/email/ E-mail since 1993Received on Fri Mar 4 13:58:24 2005
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