Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Need explanation about Common mode signal

Status
Not open for further replies.
M

mkrtich.nazaryan

Member level 5
Member level 5
Joined
Jul 20, 2010
Messages
85
Helped
12
Reputation
24
Reaction score
12
Trophy points
1,288
Location
Suzhou, Jiangsu, China
Visit site
Activity points
1,846
Hi all,
I'm reading one book now about signal integrity and met one interesting sentence. A little part from the book:
"The two most common sources of EMI are the conversion of some differential signal into a common signal".
Can anybody explain the meaning of above mentioned sentence?
Thanks.
 
Last edited:

Hi;
Differential signalling there are two signal traces (ie clk_positive and clk_negative, they are inverted/180deg phase shifted each other), receiver end use a differential amplifier to recover signal. In this system positive signal reference is negative signal.
In common mode, you have one signal and a common signal which is ground and connected within the whole system. Receiver end recovers incoming signal keeping the ground as reference.
Sentence try to explain this conversion may introduce some EMI.
Have a look at this link, **broken link removed**
Hope helps
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top