Re: [IBIS] how to create the ibis of gigabit ethernet??

Dear All,
    Thanks for your suggestion!! I have another question. If I like to model with AMS language.
Does any program translate SPICE(netlist) to AMS?? Thanks!!

Best Regards
Tina
  ----- Original Message ----- 
  From: Tom Dagostino 
  To: ??? ; Lynne D. Green 
  Cc: ibis-users@eda.org ; ibis@eda.org 
  Sent: Friday, January 06, 2006 1:12 AM
  Subject: RE: [IBIS] how to create the ibis of gigabit ethernet??


  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


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