Graduate Thesis Or Dissertation
 

Analysis and design of oversampled digital-to-analog converters

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  • Oversampled data converters are becoming increasingly popular for high-precision data conversion. There have been many publications on oversampled analog-to-digital (A/D) converters but relatively few on oversampled digital-to-analog (D/A) converters. In this thesis, issues concerning the analysis and design of the oversampled D/A converters are addressed. Simulation tools and analytical methods are discussed. A novel dual-quantization technique for achieving high-precision D/A conversion is proposed. A design example is presented to demonstrate that in many aspects the proposed technique is superior to existing techniques. The thesis is divided into four chapters. Chapter 1 is an introduction to the general concepts of Nyquist-rate and oversampled data converters. Chapter 2 describes some building blocks to be used in oversampled D/A converters and gives both theoretical and simulation methods for analzying them. Chapter 3 describes the proposed dual-quantization D/A converters, including the structure, the associated design issues and an example to verify the validity of this technique. Finally, Chapter 4 summarizes the properties of the simulated system and proposes some future research work.
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