Subject: dv/dt measurement

From: Vincent Chang <[email-masked]>
Date: Wed, 18 Jun 1997 15:09:54 -0500

all,

I have a question on rise and fall measurement.
In the cook book, it states that the rise and fall time
measurement are "no load" measurements; ie, remove the 
package parameters(L/R/C) before doing the simulation.

But, later in Lab measurement section, it states that
Capturing rise/fall time data requires either a specific test 
fixture or a motherboard to which the DUT can be attached. 
Rise/fall time measurements require an oscilloscope with 
at least a 4 GHz bandwidth. Take into account the effect 
on the rise/fall times of the device packaging and capacitive 
load.

So, why it does not use any C_pkg and C_leadfram vaule
in rise and fall time measurement in IBIS model.

I am generating ibis model from spice.

-- 
Best Regards,

			Vincent Chang

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*  Vincent Chang                         TI MSG ID: hui8              *
*  Design Automation                     mailto:[email-masked]    *
*  Memory Products Design                http://www.memh.ti.com/~mcad *
*  Texas Instruments Inc. MS 657         Phone: (281) 274-3167        *
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