A Designer's SURVIVAL GUIDE to High-Speed Serial Links

摘要

At the dawn of the personal computer era in the early 1980's, clock frequencies were about 20 MHz and no one cared about signal integrity. Interconnects were transparent. The physical design of systems was about getting the connectivity right, about fitting all the components on the board and about managing the temperature verses fan noise. Then came the high-performance era of the 1990s, when clock frequen- cies increased to 200 MHz and above. Signal integrity became the new mantra. If you did not design the product for signal integrity, the product might not work. The physical design had to take into account controlled impedance interconnects and a linear topology, a termination strategy, minimized return path inductance for low ground bounce, and a low impedance power distribution network.