Tektronix - Fundamentals of Signal Integrity

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Signal Integrity Described

By definition, “integrity” means “complete and unimpaired.” Likewise, a digital signal with good integrity has clean, fast transitions; stable and valid logic levels; accurate placement in time and it would be free of any transients.

Evolving technology makes it increasingly difficult for system developers to produce and maintain complete, unimpaired signals in digital systems.

The purpose of this primer is to provide some insight into signal integrity-related problems in digital systems, and to describe their causes, characteristics, effects, and solutions.

Digital Technology and the Information Age

It’s been over twenty years since the personal computer emerged and almost as long since cellular telephony went from being a novelty to a consumer necessity. For both, one trend has remained constant: the demand for more features and services, and the need for more bandwidth to deliver them. First-generation PC users were excited about the power of creating a simple spreadsheet. Now they demand detailed graphics, highquality audio, and fast-streaming video. And, cell phones are hardly a tool anymore for just conversation...

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