Standard IBIS will not allow you to model your multilevel driver, you will have to use the IBIS 4.1 features as Lynne points out. Tom Dagostino Teraspeed(R) Labs 13610 SW Harness Lane Beaverton, OR 97008 503-430-1065 tom@teraspeed.com www.teraspeed.com Teraspeed Consulting Group LLC 121 North River Drive Narragansett, RI 02882 401-284-1827 -----Original Message----- From: owner-ibis@eda.org [mailto:owner-ibis@eda.org]On Behalf Of ??? Sent: Thursday, January 05, 2006 12:33 AM To: Lynne D. Green Cc: ibis-users@eda.org; ibis@eda.org Subject: Re: [IBIS] how to create the ibis of gigabit ethernet?? Hi, Thanks for your response. The "5 level" mean the voltage level, not driver strength. Usually, one bit has 2 level (0 or vdd). And 2 bits have 4 level at least. Here is 2-bit using 5 level. Please give me some commemts?? Thanks!! Best Regards Tina ----- Original Message ----- From: Lynne D. Green To: '???' Cc: ibis-users@eda.org ; ibis@eda.org Sent: Thursday, January 05, 2006 3:23 PM Subject: RE: [IBIS] how to create the ibis of gigabit ethernet?? Hi, Tina, This depends on what you mean by "levels". If you mean 5 drive strength options, but no change in drive strength option during a transition, then usually one IBIS model is created for each drive strength. If you mean 5 different drive strengths used during one transition (such as a buffer with internal feedback), then table-based IBIS modeling probably would not be suitable. In this case, one could consider IBIS 4.1, with an AMS or SPICE language option. Best regards, Lynne "IBIS training when you need it, where you need it." Dr. Lynne Green Green Streak Programs http://www.greenstreakprograms.com 425-788-0412 lgreen22@mindspring.com -------------------------------------------------------------------------- From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of ??? Sent: Wednesday, January 04, 2006 9:44 PM To: ibis-users@eda.org; ibis@eda.org Subject: [IBIS] how to create the ibis of gigabit ethernet?? Hi All, I like to create the ibis file of gigabit ethernet. The output waveform has 5 levels. I don't know how to create this ibis file?? Could you give me some comments?? Thanks in advance!! Best Regards Tina |------------------------------------------------------------------ |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 Thu Jan 5 09:12:42 2006
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