Kong-Yew, Just do it as any other time. Don't worry about the internal termination. Use an external 50 Ohm (or whatever is needed) resistor to get your Vt data. By the way, the new IBIS Cookbook is available now, you may want to read it. It has a lot of good stuff on differential models. Arpad ========================================================== ________________________________ From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Kong Yew Chan Sent: Thursday, September 22, 2005 5:43 AM To: ibis-users@eda.org Subject: [IBIS-Users] Modeling Differential Open Drain With Internal Pullup Termination Hi, I have been trying to model/generate IBIS for a differential open-drain with internal pullup termination. I am confused on the load resistance setup to obtain the V-T curves. For usual open-drain, 1 rising waveform and 1 falling waveform to recommended pullup resistor termination and voltage is sufficient. However, if the pullup resistor termination and voltage is internal, how should I connect the output for V-T table? If anyone has suggestions, please let me know. Thanks. Best regards, Kong-Yew |------------------------------------------------------------------ |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 Sep 26 08:42:25 2005
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