[SI-LIST] Re: Power Integrity- How to set Z target

Generally, you can set the ripple tolerance as 5%, but not be uniform. In some 
cases maybe you need to set it as 3%.
In my option, it is very difficuilt to find the simple formulua correlated 
between power ripple and radiation, even though they are very correlative. 

 Best wishes,
----- Original Message ----- 
From: "Yosi Zanjiri" <yosi_z@xxxxxxx>
To: <si-list@xxxxxxxxxxxxx>
Sent: Sunday, December 25, 2005 8:26 PM
Subject: [SI-LIST] Power Integrity- How to set Z target


> For Power Integrity simulation, we calculate Z target as (V * %ripple 
> tolerance)/ Max. Current.
> In order to avoid over-design and get optimal results:
> 
> 1. How do I set the % ripple tolerance?
> 2. Since we test and verify results in EMC lab. I am looking for guides/ 
> formula that correlate between Z target and radiated (and conducted) emission 
> CE mask
> 
>  Best regards,
> 
>  
> Yosi Zanjiri
> R&D Value Engineering
> RAD Data Communications LTd.
> Tel: 03-6455010
> mailto:yosi_z@xxxxxxx
>  
>  
> 
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