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


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