FreeLists / si-list / [SI-LIST] Re: UltraCAD ESR and Bypass Capacitor Caculator

["Abe Riazi" <ariazi@xxxxxxxxxxxxxxx>]

      Jack Stone Wrote:

>Abe,

> Have you taken a previously unsuccessfull/successfull design and applied the 
> tool.  Then use a NA for each power plane for a stuffed board to determine
> where
> the issues really are and how the results of the tool coorealate with real 
> life
> measurements if done correctly???  I know that this is a tedious task to be
> done correctly, but does provide good data as a base line.

> Just asking.

> jack ~

Hi Jack:

To date, I have mainly applied the UltraCAD Bypass Impedance Calculator to 
analyze what combination of
capacitors can yield a flat low PDS impedance over a wide frequency bandwidth 
just like
what is explained in Doug Brooks paper , "ESR and Bypass Capacitor Self 
Resonant Behavior How to Select Bypass Caps".

Your question is a good one. I hope some people who have used that tool
more extensively will share  their experiences.

Regards,

Abe


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