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Digital System Design with SystemVerilog by Mark Zwolinski

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14. Interfacing with the Analog World

In previous chapters, we considered the world to be purely digital. Indeed, with the exception of Chapter 13, we further considered only synchronous systems. Of course the real world is asynchronous and, even worse, analog. All digital systems must at some point interact with the real world. In this chapter, we consider how analog inputs are converted to digital signals and how digital signals are converted to analog outputs. Until relatively recently, the modeling and simulation of digital and analog circuits and systems would have been performed independently of each other. A set of analog and mixed-signal extensions to Verilog (but not yet SystemVerilog) has been proposed. The language is commonly known ...

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