RE: [IBIS-Users] PullUp/PullDown toggle?

From: Lenski, Eckhard (NSN - DE/Munich) <eckhard.lenski_at_.....>
Date: Tue Dec 15 2009 - 07:29:54 PST
Hello Lars,

The results looks strange indeed.
And I have never seen such results.

But just few questions

- Do you get any warnings in the log-file ?

- you are doing a dc-sweep,  have you tried a 'slow' transient extraction ?

- you are suspecting the hspice result-files.  Does this mean by looking with a viewer the  curves look okay ?


Regards
Eckhard

Mit freundlichen Grüßen / Best regards / Cordiali saluti / ystävällisin terveisin

Eckhard Lenski 

Nokia Siemens Networks GmbH & Co. KG


COO RA GERD BTS BR PDev CAE Lib&IBIS

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-----Original Message-----
From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of ext Lars Snith
Sent: Tuesday, December 15, 2009 9:46 AM
To: ibis-users@eda.org
Subject: [IBIS-Users] PullUp/PullDown toggle?

Hello,

In some of my models the pullup/pulldown curves end up by toggling +/- 
10mA. It is not of much actual consequence, but estethically foul. An 
example follows below.

I get the same result with s2ibis3 and one other independent tool (also 
using HSpice for simulation), so I suspect this is really in the HSpice 
result files. Has anyone seen something similar before?


   2.40    -12.7710mA        -7.5000mA           -21.3261mA
   2.46    -12.8090mA        -8.0000mA           -21.3770mA
   2.52    -12.8400mA        -7.0000mA           -21.4280mA
   2.58    -12.9000mA        -7.0000mA           -21.4810mA
   2.64    -13.0000mA        -7.0000mA           -21.5310mA
   2.70    -13.0000mA        -8.0000mA           -21.5800mA
   2.76    -13.0000mA        -8.0000mA           -21.6300mA
   2.82    -13.0000mA        -10.0000mA          -22.0000mA
   2.88    -13.0000mA        0.0A                -22.0000mA
   2.94    -10.0000mA        -10.0000mA          -22.0000mA
   3.00    -10.0000mA        -10.0000mA          -22.0000mA
   3.06    -20.0000mA        -10.0000mA          -20.0000mA
   3.12    -20.0000mA        0.0A                -20.0000mA
   3.18    -10.0000mA        -10.0000mA          -30.0000mA
   3.24    -10.0000mA        -10.0000mA          -20.0000mA
   3.30    -10.0000mA        -10.0000mA          -20.0000mA
   3.36    -10.0000mA        -10.0000mA          -30.0000mA
   3.42    -20.0000mA        0.0A                -20.0000mA
   3.48    -20.0000mA        -10.0000mA          -20.0000mA
   3.54    -10.0000mA        -10.0000mA          -30.0000mA
   3.60    -10.0000mA        -10.0000mA          -20.0000mA



Best regards,  Lars Snith
-- 
Those who can, Do
Those who can't, Simulate

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Received on Tue Dec 15 07:31:23 2009

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