[SI-LIST] Re: (no subject)
- From: "Lee " <leeritchey@xxxxxxxxxxxxx>
- To: <tom_cip_11551@xxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Mon, 17 Dec 2012 10:44:37 -0800
Impedance does nor affect EMI nor does how your route over continuous
planes. Diff pairs that are close to each other, whether or not over a
plane are inherently quiet with respect to EMI. Think of fast Ethernet over
unshielded twisted pairs.
-----Original Message-----
From: miner_tom Cipollone
Sent: Sunday, December 16, 2012 4:14 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] (no subject)
I was told recently that in order to help reduce EMI in HDMI signals, routed
on a PCB from a driver IC to an HDMI connector, that it was better to route
the signals at 85 Ohms differential as opposed to 100 Ohms differential.
The contention was that with added connector L/C the overall average
impedance normalized closer to 100 Ohms.
Is there any credence to this? Is there any research material that agrees
with this?
(Hi Nazish)
Thank You
Tom
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