xshou
Member level 2
I did some reverse engineering of an optical receiver package. The make is a decent company.
And got some interesting findings:
there are a pair of 50Ohm transmission lines, CPW;
However, the center part of the traces (gold) were removed.
I'm not sure if there is any special coating on top of them.
Asked another experienced engineer; he can't explain it either.
Any clues? I would guess it might help damp possible oscillation; but how?
Thanks
And got some interesting findings:
there are a pair of 50Ohm transmission lines, CPW;
However, the center part of the traces (gold) were removed.
I'm not sure if there is any special coating on top of them.
Asked another experienced engineer; he can't explain it either.
Any clues? I would guess it might help damp possible oscillation; but how?
Thanks