PCB layout

Discover how PCB layout choices can dramatically alter S‑parameter measurements of high‑speed ESD protection devices—especially in the femtofarad range. Through 3D EM simulations and real‑world testing, this article reveals why accurate modeling and optimized test boards are essential for reliable high‑speed performance.

When your circuit misbehaves with unexplained noise and jitter, you're facing electromagnetic coupling. This practical guide walks engineers through identifying whether problems stem from differential or common mode issues, near-field or far-field effects, and provides a systematic debugging workflow to isolate sources, paths, and receivers—getting your design back on track.