RE: [IBIS-Users] s2ibis2 spectre issues

Ok, I am going to assume that when your [Spice type] was set to HSPICE
in the past, you had no issues. Now your [Spice type] says Spectre.

Since your generated .out files looks good, go back to the .s2i file and
change the [Spice type] to HSPICE and re-run the s2ibis2.sun4.fix

It will not re-generate all the .out files or the .spi since they are
already there.

Maybe (and this is the guess part), it can now construct the .ibs file
with the correct data from the .out files.

Still not sure why for a Spectre option it did not re-construct the .ibs

-Syed

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On
Behalf Of Abril, Giovanni (AS)
Sent: Thursday, May 12, 2011 2:15 PM
To: ibis-users@eda.org
Subject: [IBIS-Users] s2ibis2 spectre issues

Hi,

I'm trying to generate an IBIS model for a standard 3-state buffer from
a Spectre netlist for the first time. I've done it many times before
using HSPICE. Spectre appears to not subtract the GND clamp from the
pull-down curve correctly. The values I see in the .out files look
reasonable, but it seems to be some issue with s2ibis creating the IBIS
model. Has anyone seen this problem before? I'm running s2ibis2 V1.1
on unix. I also tried s2ibis2.sun4.fix v1.1 with no success. I'm
unable to run s2ibis3 due to java issues.

Model piece:

[Pulldown]

| voltage I(typ) I(min) I(max)

|

  -2.25 0.000A 0.000A 0.000A

  -2.05 0.000A 0.000A 0.000A

  -1.85 0.000A 0.000A 0.000A

  -1.65 0.000A 0.000A 0.000A

  -1.45 0.000A 0.000A 0.000A

  -1.25 0.000A 0.000A 0.000A

  -1.05 0.000A 0.000A 0.000A

  -0.85 0.000A 0.000A 0.000A

  -0.65 0.000A 0.000A 0.000A

  -0.45 0.000A 0.000A 0.000A

  -0.45 0.000A 0.000A 0.000A

Gct1.out piece:

Values:

0 -2.25 0.0206632257823047

1 -2.15 0.018752697278203

2 -2.05 0.0168794739250666

3 -1.95 0.015048193643308

4 -1.85 0.0132646120643909

5 -1.75 0.0115353816895163

6 -1.65 0.00986825334511118

7 -1.55 0.00827233474918234

8 -1.45 0.00675841708269555

9 -1.35 0.00533937873009047

10 -1.25 0.00403068474077055

11 -1.15 0.00285111478495499

12 -1.05 0.00182447627744615

13 -0.949999999999999 0.000985060352576678

14 -0.849999999999999 0.000388756466255174

15 -0.749999999999999 8.93848201558174e-05

16 -0.649999999999999 1.14074795064061e-05

17 -0.549999999999999 1.01773692345335e-06

18 -0.449999999999999 7.15077005548676e-08

19 -0.349999999999999 4.49799993383025e-09

20 -0.249999999999999 2.73316145092103e-10

21 -0.149999999999999 1.66519805717215e-11

22 -0.0499999999999991 9.5159052254909e-13

Pdt1.out piece:

Values:

0 -2.25 0.0390276429709649

1 -2.15 0.0370851144053552

2 -2.05 0.0351599500059903

3 -1.95 0.0332522490397326

4 -1.85 0.0313621338336076

5 -1.75 0.0294897528954238

6 -1.65 0.0276352841416111

7 -1.55 0.0257989384431105

8 -1.45 0.0239809635593247

9 -1.35 0.0221816485392388

10 -1.25 0.0204013286804044

11 -1.15 0.0186403911511655

12 -1.05 0.0168992814001036

13 -0.949999999999999 0.0151785105002577

14 -0.849999999999999 0.0134786636057362

15 -0.749999999999999 0.0118004097369629

16 -0.649999999999999 0.0101445131609938

17 -0.549999999999999 0.00851184669949703

18 -0.449999999999999 0.0069034073857026

19 -0.349999999999999 0.00532033501305709

20 -0.249999999999999 0.00376393428858811

21 -0.149999999999999 0.00223570154900383

22 -0.0499999999999991 0.000737357349174387

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