Note: Many of these entries are explained in nontechnical terms for ease of understanding. They are explained principally as they relate to PCB design issues. sy = symbol; typ = typical usage in our industry; val = value of a constant or formula relationship.

AC (alternating current)

A current that repeatedly changes value or changes direction with time.


sy Y, val 1/Z, the inverse of impedance.


typ Term used to describe the parallel resonance that can occur between two capacitors wired in parallel.


A basic physical building block consisting of protons, neutrons, and electrons.

Backward crosstalk

Coupled noise from an aggressor trace to a victim trace that travels in a direction opposite to that of the aggressor signal. ...

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