sweep range overlay in clamp curves ??

> From sascha Wed Feb 19 15:54:53 1997
> To: sabineh
> Subject: bitte abschicken, danke
> Content-Length: 992
> X-Lines: 24
>
> To:ibis-users@vhdl.org
> Subject: sweep range overlay in clamp curves ??
>
>
> Hello all,
>
> I tried to model an input structure with constantly connected pullup
> resistor using GND_clamp and POWER_clamp keywords. That causes these
> tables to contain values of some mA for instance for input voltage =
> 5V (Vcc = 5V) as opposed to some nA current for inputs without pullup
> resistor. I hope simulators will handle this correctly. (has anyone
> experiance?) The problem, anyway, is: The POWER_clamp table for 0V
> (that means 0V above Vcc) and the GND_clamp table for 5V describe the
> same point, for the input characteristic follows the sum of both tables.
> That ends up with double counting of this current value at Vout = Vcc.
> I'm not quite sure I'm right here at all since I saw a published IBIS
> file having two differend currents for POWER_clamp at 0V and GND_clamp
> at 5V and so two differend currents for the same Vout = 5V.
>
> Any comments are greatly appreciated,
>
> Sascha Pawel
>
> email: sabineh@thesys.de
>
 
Received on Wed Feb 19 07:01:42 1997