High speed signal could refer same reference gnd?

Status
Not open for further replies.
N

noisepic

Member level 3
Joined
Nov 2, 2012
Messages
66
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,781
Is it posible for 2 high speed signal using same Gnd? Suppose stack up like this:
Top1
Gnd2
Sig3
Gnd4
Sig5
Gnd6

The case sig3 and sig5? I'm afraid of return current on gnd4 conflict?
 

For very high frequency signals, the skin effect will prevent return currents from penetrating through the thickness of the reference plane, which will help isolate the two signal layers. For 1oz copper (35um), this usually happens at f>100MHz.
 

As skin depth calculator, if signal at 200MHz skin depth should be 4.6um. And my copper thickness is 35um it still no problem?
 

Depends on the signals. If they are digital, then you should be fine. If they're analog/RF, then that depends on your system specs.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…