Definition: The precise design and layout of paired signal traces that carry high-speed differential signals to ensure signal integrity and performance.
Explanation
Routing of high-speed differential signal pairs involves carefully designing the physical paths of two complementary signals that travel together at high speeds. This process requires matching trace lengths, controlling impedance, and maintaining proper spacing to minimize signal loss, reflections, and electromagnetic interference. At high data rates, such as those in USB 3.x and beyond, even small imperfections in routing can cause significant communication errors, making this a critical aspect of high-speed PCB design.
Example
In a USB 3.0 flash drive, the differential pairs carrying data signals must be routed with matched lengths and controlled impedance on the PCB. This ensures that the signals arrive simultaneously and with minimal distortion, enabling reliable data transfer at 5 Gbps speeds.
Who This Is For
This concept is essential for PCB designers, electrical engineers, and hardware developers working on high-speed digital interfaces such as USB 3.x, PCIe, HDMI, and other high-frequency communication systems.
Related Terms
differential signaling, impedance control, signal integrity, PCB trace routing, USB 3.x, high-speed design
Also Known As
differential pair routing, high-speed differential routing