Robust Sigma Delta Converters

The book proposes to categorize these requirements in 5 quality indicators which can be used to qualify a system, namely accuracy, robustness, flexibility, efficiency and emission.

Robust Sigma Delta Converters

Author: Robert H.M. van Veldhoven

Publisher: Springer Science & Business Media

ISBN: 9789400706446

Page: 296

View: 256

Sigma Delta converters are a very popular choice for the A/D converter in multi-standard, mobile and cellular receivers. Key A/D converter specifications are high dynamic range, robustness, scalability, low-power and low EMI. Robust Sigma Delta Converters presents a requirement derivation of a Sigma Delta modulator applied in a receiver for cellular and connectivity, and shows trade-offs between RF and ADC. The book proposes to categorize these requirements in 5 quality indicators which can be used to qualify a system, namely accuracy, robustness, flexibility, efficiency and emission. In the book these quality indicators are used to categorize Sigma Delta converter theory. A few highlights on each of these quality indicators are; Quality indicators: provide a means to quantify system quality. Accuracy: introduction of new Sigma Delta Modulator architectures. Robustness: a significant extension on clock jitter theory based on phase and error amplitude error models. Extension of the theory describing aliasing in Sigma Delta converters for different types of DACs in the feedback loop. Flexibility: introduction of a Sigma Delta converter bandwidth scaling theory leading to very flexible Sigma Delta converters. Efficiency: introduction of new Figure-of-Merits which better reflect performance-power trade-offs. Emission: analysis of Sigma Delta modulators on emission is not part of the book The quality indicators also reveal that, to exploit nowadays advanced IC technologies, things should be done as much as possible digital up to a limit where system optimization allows reducing system margins. At the end of the book Sigma Delta converter implementations are shown which are digitized on application-, architecture-, circuit- and layout-level. Robust Sigma Delta Converters is written under the assumption that the reader has some background in receivers and in A/D conversion.

Analog Circuit Design

This book is number 20 in this successful series of Analog Circuit Design, providing valuable information and excellent overviews of: Robust Design, chaired by Herman Casier, Consultant Sigma Delta Converters, chaired by Prof.

Analog Circuit Design

Author: Herman Casier

Publisher: Springer Science & Business Media

ISBN: 9789400703919

Page: 367

View: 309

Analog Circuit Design contains the contribution of 18 tutorials of the 19th workshop on Advances in Analog Circuit Design. Each part discusses a specific to-date topic on new and valuable design ideas in the area of analog circuit design. Each part is presented by six experts in that field and state of the art information is shared and overviewed. This book is number 20 in this successful series of Analog Circuit Design, providing valuable information and excellent overviews of: Robust Design, chaired by Herman Casier, Consultant Sigma Delta Converters, chaired by Prof. Michiel Steyaert, Catholic University Leuven RFID, chaired by Prof. Arthur van Roermund, Eindhoven University of Technology Analog Circuit Design is an essential reference source for analog circuit designers and researchers wishing to keep abreast with the latest development in the field. The tutorial coverage also makes it suitable for use in an advanced design course.

CMOS Sigma Delta Converters

[13] J. Cherry and W. Snelgrove, Continuous-Time Delta-Sigma Modulators for
HighSpeed A/D Conversion, Kluwer Academic ... [23] R. H. van Veldhoven and
A. H. M. van Roermund, Robust Sigma Delta Converters, Springer, 2011.

CMOS Sigma Delta Converters

Author: Jose M. de la Rosa

Publisher: John Wiley & Sons

ISBN: 1118568435

Page: 432

View: 427

A comprehensive overview of Sigma-Delta Analog-to-DigitalConverters (ADCs) and a practical guide to their design innano-scale CMOS for optimal performance. This book presents a systematic and comprehensive compilation ofsigma-delta converter operating principles, the new advances inarchitectures and circuits, design methodologies and practicalconsiderations − going from system-level specifications tosilicon integration, packaging and measurements, with emphasis onnanometer CMOS implementation. The book emphasizes practical designissues – from high-level behavioural modelling inMATLAB/SIMULINK, to circuit-level implementation in Cadence DesignFrameWork II. As well as being a comprehensive reference to thetheory, the book is also unique in that it gives special importanceon practical issues, giving a detailed description of the differentsteps that constitute the whole design flow of sigma-delta ADCs. The book begins with an introductory survey of sigma-deltamodulators, their fundamentals architectures and synthesis methodscovered in Chapter 1. In Chapter 2, the effect of main circuiterror mechanisms is analysed, providing the necessary understandingof the main practical issues affecting the performance ofsigma-delta modulators. The knowledge derived from the first twochapters is presented in the book as an essential part of thesystematic top-down/bottom-up synthesis methodology of sigma-deltamodulators described in Chapter 3, where a time-domain behaviouralsimulator named SIMSIDES is described and applied to the high-leveldesign and verification of sigma-delta ADCs. Chapter 4 movesfarther down from system-level to the circuit and physical level,providing a number of design recommendations and practical recipesto complete the design flow of sigma-delta modulators. To concludethe book, Chapter 5 gives an overview of the state-of-the-artsigma-delta ADCs, which are exhaustively analysed in order toextract practical design guidelines and to identify the incomingtrends, design challenges as well as practical solutions proposedby cutting-edge designs. Offers a complete survey of sigma-delta modulator architecturesfrom fundamentals to state-of-the art topologies, considering bothswitched-capacitor and continuous-time circuit implementations Gives a systematic analysis and practical design guide ofsigma-delta modulators, from a top-down/bottom-up perspective,including mathematical models and analytical procedures,behavioural modeling in MATLAB/SIMULINK, macromodeling, andcircuit-level implementation in Cadence Design FrameWork II, chipprototyping, and experimental characterization. Systematic compilation of cutting-edge sigma-deltamodulators Complete description of SIMSIDES, a time-domain behaviouralsimulator implemented in MATLAB/SIMULINK Plenty of examples, case studies, and simulation test benches,covering the different stages of the design flow of sigma-deltamodulators A number of electronic resources, including SIMSIDES, thestatistical data used in the state-of-the-art survey, as well asmany design examples and test benches are hosted on a companionwebsite Essential reading for Researchers and electronics engineeringpractitioners interested in the design of high-performance dataconverters integrated in nanometer CMOS technologies; mixed-signaldesigners.

Sigma Delta Converters Practical Design Guide

27 REFERENCES [14] J. Cherry and W. Snelgrove, Continuous-Time Delta-
Sigma Modulators for High-Speed A/D Conversion. Kluwer ... [24] R. H. van
Veldhoven and A. H. M. van Roermund, Robust Sigma Delta Converters.
Springer, 2011.

Sigma Delta Converters  Practical Design Guide

Author: Jose M. de la Rosa

Publisher: John Wiley & Sons

ISBN: 1119275784

Page: 500

View: 988

Thoroughly revised and expanded to help readers systematically increase their knowledge and insight about Sigma-Delta Modulators Sigma-Delta Modulators (SDMs) have become one of the best choices for the implementation of analog/digital interfaces of electronic systems integrated in CMOS technologies. Compared to other kinds of Analog-to-Digital Converters (ADCs), Σ∆Ms cover one of the widest conversion regions of the resolution-versus-bandwidth plane, being the most efficient solution to digitize signals in an increasingly number of applications, which span from high-resolution low-bandwidth digital audio, sensor interfaces, and instrumentation, to ultra-low power biomedical systems and medium-resolution broadband wireless communications. Following the spirit of its first edition, Sigma-Delta Converters: Practical Design Guide, 2nd Edition takes a comprehensive look at SDMs, their diverse types of architectures, circuit techniques, analysis synthesis methods, and CAD tools, as well as their practical design considerations. It compiles and updates the current research reported on the topic, and explains the multiple trade-offs involved in the whole design flow of Sigma-Delta Modulators—from specifications to chip implementation and characterization. The book follows a top-down approach in order to provide readers with the necessary understanding about recent advances, trends, and challenges in state-of-the-art Σ∆Ms. It makes more emphasis on two key points, which were not treated so deeply in the first edition: It includes a more detailed explanation of Σ∆Ms implemented using Continuous-Time (CT) circuits, going from system-level synthesis to practical circuit limitations. It provides more practical case studies and applications, as well as a deeper description of the synthesis methodologies and CAD tools employed in the design of Σ∆ converters. Sigma-Delta Converters: Practical Design Guide, 2nd Edition serves as an excellent textbook for undergraduate and graduate students in electrical engineering as well as design engineers working on SD data-converters, who are looking for a uniform and self-contained reference in this hot topic. With this goal in mind, and based on the feedback received from readers, the contents have been revised and structured to make this new edition a unique monograph written in a didactical, pedagogical, and intuitive style.

Nyquist AD Converters Sensor Interfaces and Robustness

... (The Netherlands) Limerick (Ireland) Montreux (Swiss) Graz (Austria) Spa (
Belgium) Low-Voltage Low-Power Data Converters Short-Range Wireless Front-
Ends Power Management and DC-DC Robust Design Sigma Delta Converters
RFID ...

Nyquist AD Converters  Sensor Interfaces  and Robustness

Author: Arthur H.M. van Roermund

Publisher: Springer Science & Business Media

ISBN: 1461445876

Page: 294

View: 973

This book is based on the 18 presentations during the 21st workshop on Advances in Analog Circuit Design. Expert designers provide readers with information about a variety of topics at the frontier of analog circuit design, including Nyquist analog-to-digital converters, capacitive sensor interfaces, reliability, variability, and connectivity. This book serves as a valuable reference to the state-of-the-art, for anyone involved in analog circuit research and development.

Design and Implementation of Sigma Delta Modulators M for Class D Audio Amplifiers using Differential Pairs

Available: http://books.google.pt/books?id=JC4cbfTYpSEC F. Gerfers and M.
Ortmanns, Continuous-Time Sigma-Delta A/D Conversion: Fundamentals,
Performance Limits and Robust Implementations, ser. Springer Series in
Advanced ...

Design and Implementation of Sigma Delta Modulators      M  for Class D Audio Amplifiers using Differential Pairs

Author: Nuno Pereira

Publisher: Springer

ISBN: 331911638X

Page: 76

View: 481

This book focuses on the design of a 3rd Order CT-ΣΔM where the integrator stages of the filter are implemented with Bipolar-Junction Transistors (BJT) differential pairs. These circuits are fully analyzed and the design method is carefully explained. The design method is validated through experimental measurements of several prototype circuits.

Continuous Time Sigma Delta A D Conversion

Fundamentals, Performance Limits and Robust Implementations Friedel Gerfers,
Maurits Ortmanns ... Cherry, J.A., Snelgrove, W.M.: Continuous-time Delta-Sigma
Modulators for high-speed A/D Conversion. Chapter 3 Kluwer Academic ...

Continuous Time Sigma Delta A D Conversion

Author: Friedel Gerfers

Publisher: Springer Science & Business Media

ISBN: 3540284737

Page: 242

View: 570

Sigma-delta A/D converters are a key building block in wireless and multimedia applications. This comprehensive book deals with all relevant aspects arising during the analysis, design and simulation of the now widespread continuous-time implementations of sigma-delta modulators. The results of several years of research by the authors in the field of CT sigma-delta modulators are covered, including the analysis and modeling of different CT modulator architectures, CT/DT loop filter synthesis, a detailed error analysis of all components, and possible compensation/correction schemes for the non-ideal behavior in CT sigma-delta modulators. Guidance for obtaining low-power consumption and several practical implementations are also presented. It is shown that all the proposed new theories, architectures and possible correction techniques have been confirmed by measurements on discrete or integrated circuits. Quantitative results are also provided, thus enabling prediction of the resulting accuracy.

Sigma Delta Modulators

It is shown that nonlinear decoding can achieve gains in signaling ratio and the encoder architecture. The book then addresses the instability problem that plagues higher-order ONS encoders.

Sigma Delta Modulators

Author: Søren Hein

Publisher: Springer Science & Business Media

ISBN: 9780792393092

Page: 252

View: 281

Analog-to-digital (A/D) converters are key components in digital signal processing (DSP) systems and are therefore receiving much attention as DSP becomes increasingly prevalent in telephony, audio, video, consumer products, etc. The varying demands on conversion rate, resolution and other characteristics have inspired a large number of competing A/D conversion techniques. Sigma Delta Modulators: Nonlinear Decoding Algorithms and Stability Analysis is concerned with the particular class of A/D techniques called oversampled noise-shaping (ONS) that has recently come into prominence for a number of applications. The popularity of ONS converters is due to their ease of implementation and robustness to circuit imperfectors. An ONS converter consists of an encoder that generates a high-rate, low-resolution digital signal, and a decoder that produces a low-rate, high-resolution digital approximation to the analog encoder input. The conventional decoding approach is based on linear filtering. Sigma Delta Modulators presents the optimal design of an ONS decoder for a given encoder. It is shown that nonlinear decoding can achieve gains in signaling ratio and the encoder architecture. The book then addresses the instability problem that plagues higher-order ONS encoders. A new stability concept is introduced that is well-suited to ONS encoders, and it is applied to the double-loop encoder as well as to the class of interpolative encoders. It is shown that there exists a trade-off between stability and SNR performance. Based on the results, explicit design examples are presented. Sigma Delta Modulators: Nonlinear Decoding Algorithms and Stability Analysis is a valuable reference source for researchers and engineers in industry and academia working on or interested in design and analysis of A/D converters, particularly to those working in quantization theory and signal reconstruction, and can serve as a text for advanced courses on the subjects treated.

Oversampling Delta Sigma Data Converters

Only recently have oversampling methods used for high resolution A/D and D/A conversion become popular. This is the first book to address all aspects of the subject and to compare and evaluate various design approaches.

Oversampling Delta Sigma Data Converters

Author: J. G. Candy

Publisher: Wiley-IEEE Press

ISBN:

Page: 499

View: 556

This now famous anthology brings together various aspects of oversampling methods and compares and evaluates design approaches. It describes the theoretical analysis of converter performances, the actual design of converters and their simulation, circuit implementations, and applications.

Sigma Delta A D Conversion for Signal Conditioning

In a similar way, pulse density modulation was used for robust data transmission
in telephony. In the single-bit, delta-modulated code all bits are of equal weight
and any bit-flip causes only a small error. In a multi-level PCM code though a ...

Sigma Delta A D Conversion for Signal Conditioning

Author: Kathleen Philips

Publisher: Springer Science & Business Media

ISBN: 1402046804

Page: 278

View: 553

The book gives an overview of the state-of-the-art in SigmaDelta design and of the challenges for future realizations. It provides an understanding of the fundamental power efficiency of SigmaDelta converters. In addition, it presents an analysis of the power consumption in the decimation filter. Understanding these power/performance trade-offs, it becomes clear that straight-forward digitization of a conditioning channel, i.e. exchanging analog for digital conditioning, comes at a major power penalty.

Integrated Circuit and System Design

Probably , the most robust implementation of a sigma - delta A / D converter is
using the switchedcapacitor technique . Their robustness and inherent linearity
combined with implementation efficiency are the reasons why switched -
capacitor ...

Integrated Circuit and System Design

Author:

Publisher:

ISBN:

Page:

View: 172

Time to Digital Converters

Abstract Amongst other things, time-to-digital converters are used in high energy
and particle physics, for measurement ... A continuous time sigma delta
modulator with time domain quantizer is presented as a classic approach and an
ADC based on an ... 1 This chapter discusses only a choice of the most promising
concepts for high linearity, high resolution, high bandwidth, and robust
implementation.

Time to Digital Converters

Author: Stephan Henzler

Publisher: Springer Science & Business Media

ISBN: 9048186285

Page: 124

View: 915

Micro-electronics and so integrated circuit design are heavily driven by technology scaling. The main engine of scaling is an increased system performance at reduced manufacturing cost (per system). In most systems digital circuits dominate with respect to die area and functional complexity. Digital building blocks take full - vantage of reduced device geometries in terms of area, power per functionality, and switching speed. On the other hand, analog circuits rely not on the fast transition speed between a few discrete states but fairly on the actual shape of the trans- tor characteristic. Technology scaling continuously degrades these characteristics with respect to analog performance parameters like output resistance or intrinsic gain. Below the 100 nm technology node the design of analog and mixed-signal circuits becomes perceptibly more dif cult. This is particularly true for low supply voltages near to 1V or below. The result is not only an increased design effort but also a growing power consumption. The area shrinks considerably less than p- dicted by the digital scaling factor. Obviously, both effects are contradictory to the original goal of scaling. However, digital circuits become faster, smaller, and less power hungry. The fast switching transitions reduce the susceptibility to noise, e. g. icker noise in the transistors. There are also a few drawbacks like the generation of power supply noise or the lack of power supply rejection.

Top Down Design of High Performance Sigma Delta Modulators

... Sigma - Delta modulator 6.1 INTRODUCTION Low - order ( first- and second- )
EA modulation - based A / D converters ... [ Plass78 ] are very interesting for
mixedsignal applications due to their small analog circuitry content , robustness
and ...

Top Down Design of High Performance Sigma Delta Modulators

Author: Fernando Medeiro

Publisher: Springer Science & Business Media

ISBN: 9780792383529

Page: 287

View: 856

The interest for :I:~ modulation-based NO converters has significantly increased in the last years. The reason for that is twofold. On the one hand, unlike other converters that need accurate building blocks to obtain high res olution, :I:~ converters show low sensitivity to the imperfections of their building blocks. This is achieved through extensive use of digital signal pro cessing - a desirable feature regarding the implementation of NO interfaces in mainstream CMOS technologies which are better suited for implementing fast, dense, digital circuits than accurate analog circuits. On the other hand, the number of applications with industrial interest has also grown. In fact, starting from the earliest in the audio band, today we can find :I:~ converters in a large variety of NO interfaces, ranging from instrumentation to commu nications. These advances have been supported by a number of research works that have lead to a considerably large amount of published papers and books cov ering different sub-topics: from purely theoretical aspects to architecture and circuit optimization. However, so much material is often difficultly digested by those unexperienced designers who have been committed to developing a :I:~ converter, mainly because there is a lack of methodology. In our view, a clear methodology is necessary in :I:~ modulator design because all related tasks are rather hard.

Nanometer CMOS Sigma Delta Modulators for Software Defined Radio

This book represents a contribution to the design of sigma-delta () modulators
intended for the A/D conversion in multi-standard ... On the other, both principles
make them robust with respect to non-idealities of an integrated implementation.

Nanometer CMOS Sigma Delta Modulators for Software Defined Radio

Author: Alonso Morgado

Publisher: Springer Science & Business Media

ISBN: 9781461400370

Page: 288

View: 852

This book presents innovative solutions for the implementation of Sigma-Delta Modulation (SDM) based Analog-to-Digital Conversion (ADC), required for the next generation of wireless hand-held terminals. These devices will be based on the so-called multi-standard transceiver chipsets, integrated in nanometer CMOS technologies. One of the most challenging and critical parts in such transceivers is the analog-digital interface, because of the assorted signal bandwidths and dynamic ranges that can be required to handle the A/D conversion for several operation modes. This book describes new adaptive and reconfigurable SDM ADC topologies, circuit strategies and synthesis methods, specially suited for multi-standard wireless telecom systems and future Software-defined-radios (SDRs) integrated in nanoscale CMOS. It is a practical book, going from basic concepts to the frontiers of SDM architectures and circuit implementations, which are explained in a didactical and systematic way. It gives a comprehensive overview of the state-of-the-art performance, challenges and practical solutions, providing the necessary insight to implement successful design, through an efficient design and synthesis methodology. Readers will learn a number of practical skills – from system-level design to experimental measurements and testing.

Design of Multi Bit Delta Sigma A D Converters

This book discusses both architecture and circuit design aspects of Delta-Sigma A/D converters, with a special focus on multi-bit implementations.

Design of Multi Bit Delta Sigma A D Converters

Author: Yves Geerts

Publisher: Springer Science & Business Media

ISBN: 0306480158

Page: 226

View: 289

This book discusses both architecture and circuit design aspects of Delta-Sigma A/D converters, with a special focus on multi-bit implementations. The emphasis is on high-speed high-resolution converters in CMOS for ADSL applications, although the material can also be applied for other specification goals and technologies.

Decimation Lowpass Filters for SIGMA DELTA Modulators A Comparative Study

Master's Thesis from the year 1998 in the subject Electrotechnology, grade: 1,0 (A), University of Rhode Island (--), 39 entries in the bibliography, language: English, abstract: The purpose of this thesis is to compare several filter ...

Decimation Lowpass Filters for SIGMA DELTA Modulators   A Comparative Study

Author: Rüdiger Kusch

Publisher: GRIN Verlag

ISBN: 3640862651

Page: 188

View: 932

Master's Thesis from the year 1998 in the subject Electrotechnology, grade: 1,0 (A), University of Rhode Island (--), 39 entries in the bibliography, language: English, comment:, abstract: The purpose of this thesis is to compare several filter topologies used for the decimation of sigma-delta modulated digital signals. The goal is to present optimized filter architectures with regard to an efficient VLSI implementation. A fifth-order 1-bit sigma-delta modulator using local feedback techniques will be considered as the front-end A/D converter. The subsequent digital filter reduces the sampling rate by a factor of 32. The decimation filter must guarantee a narrow transition band between 0.5 and 0.55 and stopband attenuation of 100dB. Chapter 1 provides a brief introduction into the principles of digital signal processing. The considerations are focused on FIR filters due to the requirements for acoustic applications. Chapter 2 illustrates the proposed overall structure and the design flow. The objective of chapter 3 is to present the principles of oversampling data converters using sigma-delta techniques. The 5V fifth-order SigmaDelta-modulator with 90dB dynamic range (SNR+THD) will be presented, which has been fabricated in 1.2$um CMOS technology. For the sake of simplicity and robustness, a 1-bit quantizer will be used. Chapter 4 deals with typical hardware realizations of digital filters. Apart from the brute force'' implementation of the multirate filter with identical filters running in parallel, also the LUT-based approach for small filter orders will be presented. Due to the advantages of compact implementation, the bit-serial approach and the bit-serial multiplier are investigated in detail. In chapter 5 the straightforward one-stage multirate FIR filter will be introduced. To satisfy the specifications, a 4096 tap lowpass FIR filter will be designed. The influence of coefficient quantization is investigated and furthermore the block scalin