[SI-LIST] Shield ground isolation
- From: "Kuriakose, Anand" <Anand.Kuriakose@xxxxxxx>
- To: "'si-list@xxxxxxxxxxxxx'" <si-list@xxxxxxxxxxxxx>
- Date: Sat, 22 Feb 2003 22:40:48 +0530
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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