[SI-LIST] Re: Why do we use transformer for DC blocking in ethernet connection ?
- From: "Tang, George" <George.Tang@xxxxxxxx>
- To: <glenchen@xxxxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Mon, 27 Feb 2006 16:39:43 -0700
A transformer does a lot more than DC blocking. It blocks common mode
signals (power / ground noise), matches impedances, provides ground
isolation, blocks lighting surges, and enforces a balanced differential
driver to reduce EMI. It would be VERY DIFFICULT for a capacitor to do
all that. =20
George Tang=20
LSI Logic=20
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of glenchen@xxxxxxxxxxxxx
Sent: Thursday, February 23, 2006 9:13 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Why do we use transformer for DC blocking in ethernet
connection ?
Hi , all members of si-list ,
In ethernet connection , we use transformer for DC blocking .
While
in audio applications or other high speed links , we use capacit for DC
blocking .
Can we use capacitor for DC blocking in ethernet connection ? Why ?
What
is the difference between using transformer and using capacitor for DC
blocking ?
I am very appreciated if anyone can give me the answer .
- Glen Chen
SynerChip Tech .
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=20
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