Multi-Layer PCB Impedance Control: Signal Integrity Guide
Designing Multi-Layer PCBs for High-Speed Digital Signals: Impedance Control and Signal Integrity Fundamentals Hook Your signal arrives at the receiving end 40 picoseconds late, but the clock expects it 35 picoseconds from now. The timing margin evaporates. Your high-speed digital board—carefully routed, meticulously fabricated—begins dropping packets at random intervals. The failure appears intermittent under lab conditions but becomes systematic in production, and debugging reveals the culprit: reflections bouncing back from impedance mismatches buried three layers deep in the stackup. ...