[SI-LIST] Re: Gigabit Ethernet signal on Flex PCB
- From: "Manojkumar Chidambaram - ERS, HCL Tech" <manojkumarc@xxxxxxx>
- To: 'steve weir' <weirsi@xxxxxxxxxx>, "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Wed, 5 Oct 2011 23:49:15 +0530
Hi Sreve,
In my case the flex is going to carry the signals after the Magnetics. So Flex
will be the complete physical path for Ethernet signal.
Thanks,
Manoj
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of steve weir
Sent: Tuesday, October 04, 2011 3:53 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Gigabit Ethernet signal on Flex PCB
How you design the etch depends on which end you place your magnetics.
Mode conversion will be a consideration to your geometry choices if the flex is
on the ingress/egress side of the magnetics.
Steve.
On 10/4/2011 3:37 PM, Manojkumar Chidambaram - ERS, HCL Tech wrote:
> Dear Experts,
> For one of our product it is required to route the Gigabit Ethernet signal in
> a 3 layer (S-G-S) stiffened flex PCB board of length 5 inch (Audio and other
> control signals also sharing the same flex).
>
> As I could see that the, IEEE802.3 specifically suggest an Ethernet
> Physical cable for Gigabit Ethernet; So I would like to know,
>
>
> 1. Will there be any significant impact on signal quality if I take
> these signal with a Flex PCB physical medium?
>
> 2. Do I need to pay attention on any other special requirement to route
> Gigabit Ethernet signal in the Flex PCB when compared to other high speed
> Flex PCB?
>
> Please share your experience, and important SI / EMI aspect I need to look
> for this.
>
>
> Thanks and Regards
> Manojkumar Chidambaram
>
>
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--
Steve Weir
IPBLOX, LLC
150 N. Center St. #211
Reno, NV 89501
www.ipblox.com
(775) 299-4236 Business
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