Minimizing Spurious Tones In Digital Delta Sigma Modulators
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Minimizing Spurious Tones In Digital Delta Sigma Modulators
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Author : Kaveh Hosseini
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-06-25
Minimizing Spurious Tones In Digital Delta Sigma Modulators written by Kaveh Hosseini and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-06-25 with Technology & Engineering categories.
This book describes several Digital Delta-Sigma Modulator (DDSM) architectures, including multi stage noise shaping (MASH), error feedback modulator (EFM) and single quantizer (SQ)-DDSM modulators, with a focus on predicting and maximizing their cycle lengths. The authors aim to demystify an important aspect of these particular DDSM structures, namely the existence of spurs resulting from the inherent periodicity of DDSMs with constant inputs. Simulink and MATLAB models and code are presented in Chapters 2–5 to enable the reader to reproduce the results in this work and to explore further. These examples will also be helpful for first-time designers of DDSMs.
Deterministic Techniques For Minimizing Spurious Tones In Digital Delta Sigma Modulators For Applications In Fractional N Frequency Synthesizers
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Author : Kaveh Hosseini
language : en
Publisher:
Release Date : 2009
Deterministic Techniques For Minimizing Spurious Tones In Digital Delta Sigma Modulators For Applications In Fractional N Frequency Synthesizers written by Kaveh Hosseini and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Frequency synthesizers categories.
Oversampled Delta Sigma Modulators
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Author : Mücahit Kozak
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-05-08
Oversampled Delta Sigma Modulators written by Mücahit Kozak and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-05-08 with Technology & Engineering categories.
Oversampled Delta-Sigma Modulators: Analysis, Applications, and Novel Topologies presents theorems and their mathematical proofs for the exact analysis of the quantization noise in delta-sigma modulators. Extensive mathematical equations are included throughout the book to analyze both single-stage and multi-stage architectures. It has been proved that appropriately set initial conditions generate tone free output, provided that the modulator order is at least three. These results are applied to the design of a Fractional-N PLL frequency synthesizer to produce spurious free RF waveforms. Furthermore, the book also presents time-interleaved topologies to increase the conversion bandwidth of delta-sigma modulators. The topologies have been generalized for any interleaving number and modulator order. The book is full of design and analysis techniques and contains sufficient detail that enables readers with little background in the subject to easily follow the material in it.
Delta Sigma Modulators
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Author : George I. Bourdopoulos
language : en
Publisher: Imperial College Press
Release Date : 2003
Delta Sigma Modulators written by George I. Bourdopoulos and has been published by Imperial College Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Science categories.
This important book deals with the modeling and design of higher-order single-stage delta-sigma modulators. It provides an overview of the architectures, the quantizer models, the design techniques and the implementation issues encountered in the study of the delta-sigma modulators. A number of applications are discussed, with emphasis on use in the design of analog-to-digital converters and in frequency synthesis. The book is education- rather than research-oriented, containing numerical examples and unsolved problems. It is aimed at introducing the final-year undergraduate, the graduate student or the electronic engineer to this field. Contents: Analog to Digital Conversion; ou Modulators OCo Architectures; Single-Bit Single-Stage ou Modulators, Modeling and Design; Implementation of ou Modulators; Practical Limitations of ou Modulators; Stabilization and Suppression of Tones for the Higher-Order Single-Stage ou Modulators; Decimation, Interpolation and Converters; Applications. Readership: Final-year undergraduates; graduate students; electrical, electronic and systems engineers."
Wired Wireless Internet Communications
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Author : Yevgeni Koucheryavy
language : en
Publisher: Springer
Release Date : 2017-06-15
Wired Wireless Internet Communications written by Yevgeni Koucheryavy and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-06-15 with Computers categories.
This book constitutes the proceedings of the 15th IFIP International Conference on Wired/Wireless Internet Communications, WWIC 2017, held in St. Petersburg, Russia, in June 2017. The 27 papers presented in this volume were carefully reviewed and selected from 76 submissions. They were organized in topical sections named: network analysis and dimensioning; 5G communications; network design and planning; network protocols; information technology; and circuit design.
Analog Digital Converters For Industrial Applications Including An Introduction To Digital Analog Converters
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Author : Frank Ohnhäuser
language : en
Publisher: Springer
Release Date : 2015-07-01
Analog Digital Converters For Industrial Applications Including An Introduction To Digital Analog Converters written by Frank Ohnhäuser and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-07-01 with Technology & Engineering categories.
This book offers students and those new to the topic of analog-to-digital converters (ADCs) a broad introduction, before going into details of the state-of-the-art design techniques for SAR and DS converters, including the latest research topics, which are valuable for IC design engineers as well as users of ADCs in applications. The book then addresses important topics, such as correct connectivity of ADCs in an application, the verification, characterization and testing of ADCs that ensure high-quality end products. Analog-to-digital converters are the central element in any data processing system and regulation loops such as modems or electrical motor drives. They significantly affect the performance and resolution of a system or end product. System development engineers need to be familiar with the performance parameters of the converters and understand the advantages and disadvantages of the various architectures. Integrated circuit development engineers have to overcome the problem of achieving high performance and resolution with the lowest possible power dissipation, while the digital circuitry generates distortion in supply, ground and substrate. This book explains the connections and gives suggestions for obtaining the highest possible resolution. Novel trends are illustrated in the design of analog-to-digital converters based on successive approximation and the difficulties in the development of continuous-time delta-sigma modulators are also discussed.
Design Techniques For Mash Continuous Time Delta Sigma Modulators
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Author : Qiyuan Liu
language : en
Publisher: Springer
Release Date : 2018-03-27
Design Techniques For Mash Continuous Time Delta Sigma Modulators written by Qiyuan Liu and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-03-27 with Technology & Engineering categories.
This book describes a circuit architecture for converting real analog signals into a digital format, suitable for digital signal processors. This architecture, referred to as multi-stage noise-shaping (MASH) Continuous-Time Sigma-Delta Modulators (CT-ΔΣM), has the potential to provide better digital data quality and achieve better data rate conversion with lower power consumption. The authors not only cover MASH continuous-time sigma delta modulator fundamentals, but also provide a literature review that will allow students, professors, and professionals to catch up on the latest developments in related technology.
Continuous Time Delta Sigma Modulators For High Speed A D Conversion
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Author : James A. Cherry
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-04-18
Continuous Time Delta Sigma Modulators For High Speed A D Conversion written by James A. Cherry and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-04-18 with Technology & Engineering categories.
Among analog-to-digital converters, the delta-sigma modulator has cornered the market on high to very high resolution converters at moderate speeds, with typical applications such as digital audio and instrumentation. Interest has recently increased in delta-sigma circuits built with a continuous-time loop filter rather than the more common switched-capacitor approach. Continuous-time delta-sigma modulators offer less noisy virtual ground nodes at the input, inherent protection against signal aliasing, and the potential to use a physical rather than an electrical integrator in the first stage for novel applications like accelerometers and magnetic flux sensors. More significantly, they relax settling time restrictions so that modulator clock rates can be raised. This opens the possibility of wideband (1 MHz or more) converters, possibly for use in radio applications at an intermediate frequency so that one or more stages of mixing might be done in the digital domain. Continuous-Time Delta-Sigma Modulators for High-Speed A/D Conversion: Theory, Practice and Fundamental Performance Limits covers all aspects of continuous-time delta-sigma modulator design, with particular emphasis on design for high clock speeds. The authors explain the ideal design of such modulators in terms of the well-understood discrete-time modulator design problem and provide design examples in Matlab. They also cover commonly-encountered non-idealities in continuous-time modulators and how they degrade performance, plus a wealth of material on the main problems (feedback path delays, clock jitter, and quantizer metastability) in very high-speed designs and how to avoid them. They also give a concrete design procedure for a real high-speed circuit which illustrates the tradeoffs in the selection of key parameters. Detailed circuit diagrams, simulation results and test results for an integrated continuous-time 4 GHz band-pass modulator for A/D conversion of 1 GHz analog signals are also presented. Continuous-Time Delta-Sigma Modulators for High-Speed A/D Conversion: Theory, Practice and Fundamental Performance Limits concludes with some promising modulator architectures and a list of the challenges that remain in this exciting field.
Spurious Tone Mitigation In Fractional N Phase Locked Loops
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Author : Eythan Familier
language : en
Publisher:
Release Date : 2016
Spurious Tone Mitigation In Fractional N Phase Locked Loops written by Eythan Familier and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Fractional-N phase-locked loops (PLLs) are widely used to synthesize local oscillator signals for modulation and demodulation in communication systems. Their phase error inevitably consists of both a periodic component made up of spurious tones and a random component called phase noise. Spurious tones are particularly harmful to the performance of typical communication systems, so most communication standards stipulate stringent limits on their maximum power in relevant frequency bands. High-performance PLLs generally contain noise-shaping coarse quantizers to control their output frequency. Such quantizers are a fundamental source of spurious tones in the PLL's phase error. This is because spurious tones are inevitably induced when the quantizer's quantization noise is subjected to nonlinear distortion from analog circuit imperfections. This dissertation presents a rigorous analysis of this effect and a way to mitigate it through the use of a class of digital quantizers with first and higher-order highpass shaped quantization noise which are optimized for spurious tone and phase noise mitigation. The first chapter of this dissertation presents a mathematical analysis of spurious tone generation via nonlinear distortion of quantization noise. It proves that subjecting the quantization noise running sum of a digital quantizer to a nonlinearity of a certain order will inevitably induce spurious tones, and shows the relation between such nonlinearity order and the range of values the quantization noise running sum takes. The results are general and apply to any digital quantizer. The second chapter of this dissertation presents a class of digital quantizers with optimal immunity to nonlinearity-induced spurious tones and with first-order highpass shaped quantization noise. It presents design solutions for digital quantizers with quantization noise that can be subjected to nonlinear distortion of a given order without inducing spurious tones, and relies on the results from the first chapter to prove that the presented solutions are optimal in terms of spurious tone generation. The third chapter of this dissertation presents digital quantizers with second and third-order highpass shaped quantization noise which can be optimized for either spurious tone or phase noise mitigation. These quantizers can replace the often-used delta-sigma modulators in high-performance PLLs to either improve spurious-tone performance at the expense of slightly higher PLL phase noise or lower PLL phase noise. The fourth chapter of this dissertation present an integrated circuit PLL which implements the second and third-order digital quantizers presented in the third chapter. It demonstrates record-setting spurious tone performance due to the use of these digital quantizers and to a new linearity-enhancement PLL timing scheme.
Delta Sigma Data Converters
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Author : Steven R. Norsworthy
language : en
Publisher: Wiley-IEEE Press
Release Date : 1996-10-28
Delta Sigma Data Converters written by Steven R. Norsworthy and has been published by Wiley-IEEE Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-10-28 with Technology & Engineering categories.
This comprehensive guide offers a detailed treatment of the analysis, design, simulation and testing of the full range of today's leading delta-sigma data converters. Written by professionals experienced in all practical aspects of delta-sigma modulator design, Delta-Sigma Data Converters provides comprehensive coverage of low and high-order single-bit, bandpass, continuous-time, multi-stage modulators as well as advanced topics, including idle-channel tones, stability, decimation and interpolation filter design, and simulation.