Which one of these BGA fanouts is better?
Both are the same nominal trace/space, both are skew matched by the time you get to the vertical "home run" area heading towards the connector.
But TDR of t...
@nprofile1q... second one. each discontinuity causes a reflection and eats your link loss budget.
I did read a while back that there's some trickery you can do with picking meander geometries whose propagation times are an integer divisor of the fundamental period, which makes the losses easier to correct at the driver (iirc with channel EQ), but I can't recall what the paper was called.
I did read a while back that there's some trickery you can do with picking meander geometries whose propagation times are an integer divisor of the fundamental period, which makes the losses easier to correct at the driver (iirc with channel EQ), but I can't recall what the paper was called.
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