Re: V/T Question

From: D. C. Sessions <dc.sessions@vlsi.com>
Date: Fri Aug 13 1999 - 07:36:27 PDT

Christian Klein wrote:
>
> Greetings everyone I am new to this list and IBIS, so I have a few
> questions regarding model making.
> One question is on extracting rising and falling waveforms. In the
> cookbook (pg. 11) it says: "If the device does not have enough drive
> capability to make a significant output transition then a higher value
> of load resistance may be used,..."
> I am unsure about the words "significant output transition". Does it
> mean not reaching the Data Sheet Vol or Voh?

Nothing so clear-cut.

It means that if the peak delta-V is MUCH less than the open-circuit swing
(supply voltage) then you've lost too much detail and should change the
loading to get more. A pretty good target is to have they TYP swing
be about half of supply.

-- 
D. C. Sessions
dc.sessions@vlsi.com
Received on Fri Aug 13 07:43:27 1999

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