Cross talk is one of the four families of signal-integrity problems. It is the transfer of an unwanted signal from one net to an adjacent net and will occur between every pair of nets. A net includes both the signal and the return path, and connects one or more nodes in a system. We typically call the net with the source of the noise the active net or the aggressor net. The net on which the noise is generated is called the quiet net or the victim net.
Cross talk is an effect that happens between the signal and return paths of one net and the signal and return paths of a second net. The entire signal-return path loop is important, not just the signal path.
The noise margin is typically about ...
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