[SI-LIST] Re: ibis check output errors

Alaa,

Your IV curves may have the opposite polarity.  I am
saying this, because the parser's IV curve and load line
solver solves for negative voltages for the rising edge.

Arpad Muranyi
Intel Corporation
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Alaa Alani
Sent: Wednesday, February 11, 2004 8:51 AM
To: 'si-list@xxxxxxxxxxxxx'
Subject: [SI-LIST] ibis check output errors


Hi Guys,

can anyone help explain why the ibis checker is reporting these huge
differences between the I-V curves and V-t curves. I checked the =
transient
response of the buffer and it looks good. Is it something to do with
tolerance or range of voltage?=20

Any help would be greatly appreciated.

Thanks,
Alaa Alani

here 's the ibis checker output:
----------------------------------------------------------------------

ERROR - Model driver: The [Rising Waveform]=20
      with [R_fixture]=3D500 Ohms and [V_fixture]=3D0V
      has TYP column DC endpoints of  0.00V and  0.85v, but
      an equivalent load applied to the model's I-V tables yields
      different voltages (-1.20V and -1.10V),
      a difference of 1200.01% and 1950.00%, respectively.
ERROR - Model driver: The [Falling Waveform]=20
      with [R_fixture]=3D500 Ohms and [V_fixture]=3D1.2V
      has TYP column DC endpoints of  0.17V and  1.20v, but
      an equivalent load applied to the model's I-V tables yields
      different voltages (-1.20V and -1.10V),
      a difference of 1370.00% and 2300.00%, respectively.
ERROR - Model driver: The [Rising Waveform]=20
      with [R_fixture]=3D500 Ohms and [V_fixture_min]=3D0V
      has MIN column DC endpoints of  0.00V and  0.66v, but
      an equivalent load applied to the model's I-V tables yields
      different voltages (-1.20V and -1.22V),
      a difference of 6000.07% and 9400.00%, respectively.
ERROR - Model driver: The [Falling Waveform]=20
      with [R_fixture]=3D500 Ohms and [V_fixture_min]=3D1.2V
      has MIN column DC endpoints of  0.29V and  1.11v, but
      an equivalent load applied to the model's I-V tables yields
      different voltages (-1.20V and -1.22V),
      a difference of 7450.00% and 11650.00%, respectively.
ERROR - Model driver: The [Rising Waveform]=20
      with [R_fixture]=3D500 Ohms and [V_fixture_max]=3D0V
      has MAX column DC endpoints of  0.00V and  1.01v, but
      an equivalent load applied to the model's I-V tables yields
      different voltages (-1.20V and -0.98V),
      a difference of 545.46% and 904.55%, respectively.
ERROR - Model driver: The [Falling Waveform]=20
      with [R_fixture]=3D500 Ohms and [V_fixture_max]=3D1.2V
      has MAX column DC endpoints of  0.13V and  1.30v, but
      an equivalent load applied to the model's I-V tables yields
      different voltages (-1.20V and -0.98V),
      a difference of 604.55% and 1036.36%, respectively.PowerVR
Imagination Technologies Ltd.

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