What Tom is writing is correct, but he forgot to mention the clamp tables. The currents in the clamps tables must always be added to the calculation Tom described to find the high and low levels. Arpad ==================================================== -----Original Message----- From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Tom Dagostino Sent: Monday, April 11, 2005 9:51 AM To: Akhilesh CHANDRA; ibis-users@eda.org Subject: RE: [IBIS-Users] logic0 and logic1 problem in IBIS models Akhilesh The logic 1 and logic 0 states depend on the load attached to the buffer. If the load is an open circuit then the logic 0 will be the voltage in the pulldown table where the current is zero. The 1 will be the voltage in the pullup table where the current is zero. You can construct load lines and apply those to the IV tables to predict the output voltage for any load. Regards, Tom Dagostino Teraspeed Labs 13610 SW Harness Lane Beaverton, OR 97008 503-430-1065 http://www.teraspeed.com tom@teraspeed.com Teraspeed Consulting Group LLC 121 North River Drive Narragansett, RI 02882 401-284-1827 Teraspeed is the registered service mark of Teraspeed Consulting Group LLC |------------------------------------------------------------------ |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 Mon Apr 11 11:20:51 2005
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