Subject: Re: ibischk3 ver 3.2.8 and Open_drain
From: Takanobu Ura (t-ura@pb.jp.nec.com)
Date: Fri Jan 11 2002 - 02:20:31 PST
Dear Tom Dagostino
Dear Ingraham, Andrew
Thank you for advice. I have misstaken I-V table of GNDClamp.
GNDClamp was not measured in the state of High Impedance.
Thank you very much.
Regards,
T.Ura
"Dagostino, Tom" wrote:
>
> Power and ground clamps should be OK. I'm curious about the error, can I have a look at the file? I've seen similar errors when there were repeated voltage values in the IV tables.
"Ingraham, Andrew" wrote:
>
> Looking at your data, I suspect there is something wrong with the I-V
> tables.
>
> I would expect an open-drain output to go to V_fixture (3.3V) when OFF.
> Yet the I-V curves suggest it only reaches 1.15V when OFF.
>
> Also it is very suspicious that the waveform starts at 1.15V (with the
> output steady-state ON), but the I-V curves suggest the same exact value
> when OFF. Sounds to me like something is backwards.
>
> I don't think there is anything wrong about having both [POWER Clamp]
> and [GND Clamp] with an open-drain output.
>
> Regards,
> Andy
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