Components have often been selected based on voltage-oriented specifications in the time domain for systems whose specifications are expressed in frequency and power.
The digital communications topic is so vast as to defy a comprehensive treatment in anything less than a shelf of books.Ī communications jargon and a bewildering array of acronyms have developed, making it sometimes difficult for the communications system engineer and the circuit hardware designer to communicate with one another. The richness of design and architectural alternatives produced by such variety boggles the mind. Some transmission schemes are constrained by formal standards, others are free-lance or developmental. The transmission rate can range from a few bits per second for an industrial control signal communicating across a factory floor to 32 kbits/second for compressed voice, 2 Mb/s for MPEG compressed video, 155 Mbps for a SONET data trunk, and beyond. The transmission medium can be a twisted pair of copper wire, coaxial cable, fiber-optic cable, or wireless-via any number of different frequency bands. More and more, communications is about moving bits from point A to point B.ĭigital communications embraces an enormous variety of applications, with radically different constraints. Entities responsible for providing communications networks, both wired and wireless, are faced with the staggering challenge of keeping up with the exponentially growing demand for digital communications traffic. Audio recording/playback, wired telephony, wireless telephony, audio and video broadcast-all of these nominally analog communications media have adopted, or are adopting, digital standards.
Information is increasingly created, manipulated, stored, and transmitted in digital form-even signals that are fundamentally analog. Selecting Mixed-Signal Components for Digital Communication Systems-An IntroductionĬommunications is about moving information from point A to point B, but the computer revolution is fundamentally changing the nature of communication.
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