[SI-LIST] Re: Reference voltages in IBIS model

  • From: Bob Patel <whizplayer@xxxxxxxxx>
  • To: "Peters, Stephen" <stephen.peters@xxxxxxxxx>
  • Date: Thu, 5 Dec 2002 15:24:46 -0800 (PST)

Thanks. This confirms the sims I ran with the settings
for PullUp & powerClamp which I set to max reference
voltage for Fast & minimum reference voltage for Slow
mode.
THanks
Bob
--- "Peters, Stephen" <stephen.peters@xxxxxxxxx>
wrote:
> 
> Hello Bob:
> 
>   The short answer to your question is yes. The data
> in the I-V tables
> reflects variations in the reference voltages listed
> under [Voltage Range],
> [Pullup Reference], etc., so unless the model I-V
> data were taken from a
> silicon design that compensates for PVT variations
> Voh should vary with the
> model corner simulated.  However, it should be noted
> that 'typ', 'slow', and
> 'fast' corner models also reflect changes in
> temperature and silicon process
> as well as VCC. Any Voh changes will include the
> affects of these variables
> also.
> 
>  Hope this helps.
> 
>  Regards,
>  Stephen Peters
>  Intel Corp.
> 
> 
> -----Original Message-----
> From: Bob Patel [mailto:whizplayer@xxxxxxxxx]
> Sent: Thursday, December 05, 2002 1:48 PM
> To: si_list
> Subject: [SI-LIST] Reference voltages in IBIS model
> 
> 
> 
> Hi! I had a question regarding the reference
> voltages
> in IBIS models. Are the VI tables for max, min, typ
> for pullup, powerclamp based on the reference
> voltages
> i.e. fast=max vcc typ= typ vcc & slow= min vcc.
> If correct then in order to look at variations of
> Voh
> based on VCC I use fast, slow & typ process to run
> simulations.
> Am I correct?
> Please advise
> Thanks in advance
> Bob
> 
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