PCB DESIGN FOR HIGH-SPEED CIRCUITS
The previous layout suggestions are relatively general and can be applied to most circuits to reduce electromagnetic compatibility (EMC) problems, almost regardless of the circuit function. In high-speed systems, where there are many signal lines carrying high-speed signals with high rise and fall times (e.g. clock signals, data busses, address busses) attention needs to be paid to the effect of track and termination impedance using transmission line principles.
The correct application of transmission line principles also requires the application of some mathematics. Whereas the previous suggestions may have seemed intuitive and their application not very scientific, they have in fact been derived ...
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