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Engineers designing servers, storage devices, multimedia PCs, entertainment systems, and telecom systems have driven an industry trend to replace legacy shared parallel buses with high-speed point-to-point serial buses. Standard interfaces like XAUI, XFI, Serial ATA, PCI Express, HDMI, and FB-DIMM have emerged to provide greater throughput using serial signaling rates of 2.5 to 10 Gb/s. While this trend has greatly reduced the number of traces and connections within the system, it has created new challenges for board designers when considering implementation with multiple connectors, transmission lines, vias, IC packaging, and transceiver circuits. Reliable signal transmission across a host board or between daughter cards on a backplane at GHz speeds compels adoption of new strategies and tools.
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