High-Speed PCB Design

In a high-speed digital design the routing cannot be considered as simple interconnections. With a fast switching signal, energy can reflect from the target pin back towards the source, interacting with and distorting the original signal. The way that the energy in the signal interacts with the materials that carry the signal changes too. No longer contained within the routing copper, some of the energy travels in the surrounding insulation. This energy can radiate from the route and couple into adjacent routes, or radiate further and become electromagnetic interference (EMI), resulting in the product failing to meet mandatory emission standards. These challenges are managed by applying suitable high-speed design techniques, including: