Best Practices for Differential Pair Signal Transitioning
I'm in the midst of transitioning a differential pair between layers on my PCB design, and I want to make sure I'm following the best practices to maintain signal integrity. Could you share some industry insights on how to do this effectively, considering factors like via placement and impedance matching?
Solution
Considering a dielectric constant of about 4, the signal propagation speed is about 150.000.000 m/s. The cycle of your clock is 5 ns. The distance the signal travels during a single clock cycle is 150.000.000 m/s x 5 ns = 750 mm. If your transmission channel is shorter than 30 mm, I recommend focusing on other things than this transmission channel.
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