I am trying to create a PCB trace with FCBGA packaging and differential Tx/Rx. I want to characterize the effect of each discontinuities while modeling the channel. Now I am not sure about the grounding and power place with the trace. I am trying to create the equivalent channel based on the following FCBGA cross-section provided in the book "On and Off-Chip Crosstalk Avoidance in VLSI Design"
My created equivalent circuit is given below onlyfrom Tx to PCB side. Please ignore the values as I haven't put the values yet. I am concentrating on the accuracy of the equivalent circuit now.
TX to PCB:
Tx to package:
Package to PCB_1
Package to PCB_2
Now, I have some issues is my equivalent characterization ok ( I am not talking about the values)?
I have used TLine type 2 for both package and PCB traces as I am using differential Tx/Rx.
If the two wiring path (+/-) are used for differentials how can I define the power and ground planes of PCB? I have added planar capacitance (Pic: Package to PCB_2), should I use for both the wiring?
Is the ground that I used is enough for ground plane?
Your comments will be highly appriciated.