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

From: lau yy <tok47_at_.....>
Date: Fri May 06 2005 - 15:23:48 PDT

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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