RE: [IBIS-Users] PULL-UP and PULL-DOWN problem

This looks like your enable control is in the wrong state.

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

  -----Original Message-----
  From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org]On Behalf
Of lau yy
  Sent: Friday, May 06, 2005 3:24 PM
  To: ibis-users@eda.org
  Subject: [IBIS-Users] PULL-UP and PULL-DOWN problem


  Dear ALL,

  I already solve the previous problem. That just a small bug in IBIS. I
just need to correct it manually and it will be fine.

  Here, I got another questions.

  Do anyone know what will cause [PULLUP] and [PULLDOWN] will have 0 current
flow from -1.8v to 1.8v? I shared my datas below.

    -1.8000       0.000A              0.000A              0.000A

    -1.7000       0.000A              0.000A              0.000A

     .

     .

     .

     1.7000       0.000A              0.000A              0.000A

     1.8000       0.000A              0.000A              0.000A

     1.9000       14.6800uA           14.9900uA           14.2500uA

     2.0000       15.7200uA           16.0200uA           15.2900uA




  And why this errors will occur?

  ERROR - Model IO31: The [Rising Waveform]

        with [R_fixture]=70 Ohms and [V_fixture_min]=0V

        has MIN column DC endpoints of  0.00V and  0.00v, but

        an equivalent load applied to the model's I-V tables yields

        different voltages (-0.90V and  0.00V),

        a difference of -100.04% and 66.57%, respectively.

  ERROR - Model IO31: The [Falling Waveform]

        with [R_fixture]=70 Ohms and [V_fixture_max]=0V

        has MAX column DC endpoints of  0.00V and  0.00v, but

        an equivalent load applied to the model's I-V tables yields

        different voltages (-0.90V and  0.00V),




  Thanks







  rdgs

  yylau


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