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.

Future Design

Future Design

Quick Overview

Category
Uncategorized
Language
Total members
64
Total events
0
Total discussions
3
Total views
8K
Total albums
0

Skin Effect in PCB:

Status
Not open for further replies.

praveenlb

Full Member level 3
Joined
Sep 19, 2010
Messages
183
Helped
35
Reputation
70
Reaction score
32
Trophy points
1,318
Location
Bangalore
Activity points
2,123
During high frequency signal the skin effect will affairs on the PCB board . which will compliantly disturbs all other signals which is near to that trace. We can minimize this effect bye providing more space fore trace width this signal are flows surface of the copper trace.
normally above 80 MHz frequency signal are called high speed signal :lol:
 

cks3976

Full Member level 6
Joined
Aug 8, 2007
Messages
346
Helped
84
Reputation
168
Reaction score
81
Trophy points
1,308
Location
India
Activity points
3,324
Praveen,
Skin effect is the tendency of High speed currents to flow more on the "skin" on the wire and lesser and lesser deep inside it. This is due to increase of resistance of the wire at higher frequencies.

Skin Effect depends on lot of factors such as frequency of operation, resistivity of the material (yes- this is constant at 4.458 E0–9 for Copper), medium of operation and surface finishing of the copper etch (rougher the finishing, more is the resistance of copper). Skin effect is proportional to the Square root of Frequency. And another point to be noted is- what is this frequency - no it’s not the signal frequency as many have misunderstood. It's the switching frequency of the signal. Even a slow 5MHz signal with a Rise/Fall time of 10% of its pulse width (20 u Sec) will switch at 50MHz !!, so classifying signals that are only above 80MHz as high speed signals is not appropriate IMO.

Experts please add to this..

Best Regards,
Subbu
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top