[SI-LIST] Re: Shield ground isolation
- From: "Paul Young" <paulnets@xxxxxxxxxxxxxx>
- To: <Anand.Kuriakose@xxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Mon, 24 Feb 2003 08:51:45 +0800
Hi,
Same to me.
Can anyone out there give the answer?
Paul
----- Original Message -----
From: "Kuriakose, Anand" <Anand.Kuriakose@xxxxxxx>
To: <si-list@xxxxxxxxxxxxx>
Sent: Sunday, February 23, 2003 1:07 AM
Subject: [SI-LIST] Shield ground isolation
>
> Hi All,
>
> On high speed boards with I/O connections running to outside world, the
> shield ground of the connectors should be isolated from the digital ground
> if the board has to meet the requirements of EMI/EMC compliance standards.
>
> Are there any side-effects of isolating the shield ground from the digital
> ground?
>
>
> I have seen on some boards, that the isolation is achieved by using
ferrite
> beads. On few others i have seen capacitors being used b/n shield and
> digital ground.
>
> How are capacitors useful in acheiving isolation? Or are these caps used
for
> some other purpose, which i am not able to understand?
>
> What is the best method to achieve this isolation?
>
> Thanks in advance.
>
> Regards,
> Anand.
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