[SI-LIST] Re: Power Integrity- How to set Z target
- From: z39453 <zhangshengli@xxxxxxxxxx>
- To: yosi_z@xxxxxxx
- Date: Mon, 26 Dec 2005 11:24:12 +0800
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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