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.

remove the copper from ground and power plane under the ferrite and common mode chock

Status
Not open for further replies.

razakb

Newbie level 4
Joined
Jan 27, 2011
Messages
5
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,312
Is it necessary to remove the copper from ground and power plane under the ferrite and common mode chock,
 

May be you could avoid draw power plane under that components.
But, I can´t see any problem to route ground there.

+++
 

If you are talking about a SMPS (switch mode power supply) choke, if so it can be prefferable to remove copper from under the switching loops to avoid capacitive coupling of the switching noise to the planes for EMC purposes, and from under the magnetics to avoid magnetic coupling. Engineers have differing opinions on this and how much copper should be removed, so I should check with the circuit designer. All our SMD inductors for SMPS have no copper under them on any layer.
 
  • Like
Reactions: razakb

    razakb

    Points: 2
    Helpful Answer Positive Rating
Actually i am placed common mode chock for lvds and HDMI nets those nets connected between qseven module and displayport and those nets are high speed differential nets.
 

Interesting, I havn't played with HDMI signals, I would check some HDMI guidelines.
Without further research I wouldn't like to give an opinion. If you look at Ethernet magnetics, they recomend removing copper from under the devices, but cant say for HDMI.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top