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Front Cover
Front Matter
Copyright Page
Contents
Preface
Introduction
Chapter 1 An Overview of Basic Concepts
Chapter 2 Quantization Noise in ΔΣ A/D Converters
Chapter 3 Quantization Errors and Dithering in ΔΣ Modulators
Chapter 4 Stability Theory for ΔΣ Modulators
Chapter 5 The Design of High-Order Single-Bit ΔΣ ADCs
Chapter 6 The Design of Cascaded ΔΣ ADCs
Chapter 7 High-Speed Cascaded ΔΣ ADCs
Chapter 8 Delta-Sigma ADCs with Multibit Internal Converters
Chapter 9 The Design of Bandpass ΔΣ ADCs
Chapter 10 Architecturestor ΔΣ DACs
Chapter 11 Analog Circuit Design for ΔΣ ADCs
Chapter 12 Analog Circuit Design for ΔΣ DACs
Chapter 13 Decimation and Interpolation for ΔΣ Conversion
Chapter 14 CAD for the Analysis and Design of ΔΣ Converters
Index
About the Editors
Delta-Sigma Data Converters
IEEE Press 445 Hoes Lane, P.O. Box 1331 Piscataway, NJ 08855-1331 Editorial Board John B. Anderson, Editor in Chief P. M. Anderson M. Eden M. E. El-Hawary S. Furui A. H. Haddad R. Herrick G. F. Hoffnagle R. F. Hoyt S. Kartalopoulos P. Laplante R. S. Muller W. D. Reeve 0.1. Wells Dudley R. Kay, Director of Book Publishing John Griffin, Senior Editor Lisa Dayne, Assistant Editor Linda Matarazzo, Editorial Assistant Savoula Amanatidis, Production Editor IEEE Circuits & Systems Society, Sponsor CAS-S Liaison to IEEE Press, Jaime Ramirez-Angulo Also of Interest from IEEE Press ... Oversampling Delta-Sigma Data Converters: Theory, Design and Simulation edited by James C. Candy, AT&T Bell Laboratories and Gabor C. Ternes, Oregon State University 1992 ISBN 0-87942-285-8 Hardcover 512 pp Clock Distribution Networks in VLSI Circuits and Systems edited by Eby G. Friedman, University of Rochester 1995 Hardcover 544 pp ISBN 0-7803-1058-6 Nonvolatile Semiconductor Memories: Technologies, Design, and Applications edited by Chenming Hu, University of California, Berkeley 1991 Hardcover 496 pp ISBN 0-87942-269-6 Monolithic Phase-Locked Loops and Clock Recovery Circuits: Theory and Design edited by Behzad Razavi, AT&T Bell Laboratories 1996 Hardcover 512 pp ISBN 0-7803-1149-3 Routing in the Third Dimension: From VLSI Chips to MCMs Naveed A. Sherwani, Siddharth Bhingarde, and Anand Panyam, Microprocessor Division, Intel Corporation 1995 ISBN 0-7803-1089-6 Hardcover 376 pp Circuits and Systems Tutorials Chris Toumazou, Editor; Nick Battersby and Sonia Porta, Assistant Editors 1996 Softcover 700 pp ISBN 0-7803-1170-1
Delta-Sigma Data Converters Theory, Design, and Simulation Edited by Steven R. Norsworthy Motorola Richard Schreier Oregon State University Gabor C. Ternes Oregon State University IEEE Circuits &Systems Society, Sponsor +IEEE The Institute of Electrical and Electronics Engineers, Inc., New York mWILEY- ~ INTERSCI ENCE A JOHN WILEY & SONS, INC., PUBLICATION
© 1997 THE INSTITUTE OF ELECTRICALAND ELECTRONICS ENGINEERS, INC. 3 Park Avenue, 17th Floor, New York, NY 10016-5997 All rights reserved. Published by John Wiley & Sons, Inc., Hoboken, New Jersey. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning, or otherwise, except as permitted under Section t07 or 108 of the 1976 United States Copyright Act, without either the prior written permission of the Publisher, or authorizationthrough payment of the appropriate per-copy fee to the Copyright Clearance Center, Inc., 222 Rosewood Drive, Danvers, MA 01923, 978-750-8400, fax 978-750-4470,or on the web at www.copyright.com. Requests to the Publisher for permission should be addressed to the PermissionsDepartment, John Wiley & Sons, Inc., III River Street, Hoboken, NJ 07030,(201) 748-6011, fax (201) 748-6008, e mail: permcoordinator@wiley.com. For general information on our other products and services please contact our Customer Care Department within the U.S. at 877-762-2974, outside the U.S. at 317-572-3993 or fax 317-572-4002. 10 9 Library of Congress Cataloging-in-Publication Data Delta-sigma data converters: theory, design, and simulation / edited by Steven R. Norsworthy, Richard Schreier, Gabor C. Ternes; IEEE Circuits & Systems Society, sponsor. p. cm. Includes index. ISBN 0-7803-1045-4 1. Analog-to-digital converters. 2. Digital-to-analog converters. 1. Norsworthy, Steven R. . III. Ternes, Gabor C. 3. Modulators (Electronics)--Design. . II. Schreier, Richard (date) (date) . IV. IEEE Circuits & Systems Society. (date) TK7887.6.D45 621.3815'322--dc20 1996 96-14774 CIP
Contents Preface xv Introduction xvii Chapter 1 An Overview of Basic Concepts J. C. Candy 1 Introduction 1 1.1 1.2 Digital Modulation 3 1.2.1 Quantization 3 1.2.2 Delta-Sigma Modulation 5 1.2.2.1 First-Order Feedback Quantizer 5 1.2.2.2 Modulation Noise inBusy Signals 1.2.2.3 Pattern Noise from ~L Modulation with de Inputs 8 1.2.2.4 Dead Zones 1.2.2.5 Influence of Circuit Parameters in ~L Modulation 10 on ~L Modulation 11 7 1.2.3 High-Order Modulation 14 1.2.3.1 Predicting In-Band Values of Quantization Error 14 1.2.3.2 Noise inHigh-Order ~L Modulation 14 1.2.3.3 Dynamic Range of the Modulators 16 1.2.3.4 Influence of Circuit Parameters 1.2.3.5 Limit Cycles 1.2.3.6 Noise Shaping Using Filters with Nonmonotonic Transfer Functions inThird-Order ~L Modulators 20 on Second-Order Modulators 19 1.2.4 Some Alternative Modulator Structures 23 1.2.4.1 Error Feedback 1.2.4.2 Cascaded Modulators 24 1.2.4.3 Delta Modulation 26 23 22 v
vi Contents 28 1.3 Decimating the Modulated Signal 1.3.1 Multistage Decimation 28 1.3.2 Design of the First-Stage Decimator 29 1.3.3 1.3.4 Implementing sine Decimators The Low-Pass Filter 35 1.4 Oversampling OfA Converters 36 32 1.4.1 Demodulating Signals at Elevated Word Rates 36 1.4.2 1.4.3 Demodulator Stage Interpolating with sincK-Shaped Filter Functions 37 38 1.4.3.1 Quantizing the Digital Signal 38 1.4.3.2 Quantization with Error Feedback 1.4.3.3 Cascaded Demodulators 1.4.3.4 Circuit Design for ~L Demodulation 40 38 40 1.5 Conclusion References 41 41 Chapter 2 Quantization Noise Robert M. Gray in ~L AID Converters 44 Additive White-Noise Approximation Function Method 53 46 Pulse Code Modulation Quantization Noise 55 45 Introduction 44 2.1 2.2 Uniform Quantization 2.3 2.4 Characteristic 2.5 2.6 Dithered PCM 58 2.7 2.8 Two-Stage 2.9 2.10 Some Extensions 68 Single-Loop ~L Modulation 59 (Cascade or MASH) ~L Modulation 64 Second-Order ~L Modulation 66 2.10.1 Dithered Single-Loop ~L Modulation 68 2.10.2 Multistage and Higher Order ~L Modulation 68 2.10.3 Leaky Integrating dL Modulation 69 2.10.4 Multibit Quantizer, Single-Bit Feedback 2.10.5 Related Work 69 69 2.11 Conclusion 70 Acknowledgments References 70 70 Chapter 3 Quantization Errors Steven R. Norsworthy and Dithering in ~L Modulators 75 3.1 3.2 Introduction 75 3.1.1 3.1.2 Basic Structures Problems with Empirically Based Reports on dL Modulators 77 Steps Taken to Ensure Accuracy of Results 77 and Terminology 78
Contents vii 3.3 Observability of Periodic Sequences 3.4 80 inSingle-Stage ~L Modulators 84 Second-Order Modulator 85 Third-Order Modulator 88 Fifth-Order Modulator 92 Baseband Demodulation of Tones Near j~,/2 95 Tones 3.4.1 3.4.2 3.4.3 3.4.4 3.4.5 Higher-Order and Multibit Single-Stage Modulators 97 Tones Tones 3.6.1 3.6.2 3.6.3 Multistage Modulator Test 104 in Multistage ~L Modulators 98 in ~L Converter Hardware 100 Third-Order Digital Modulator Test 101 Fifth-Order Digital Modulator Test 102 3.5 3.6 3.7 Dither in PCM Quantizers 104 Nonsubtractive Dither 104 Subtractive Dither 105 3.7.1 3.7.2 3.8 Dither Topologies for ~L Modulators 107 3.9 107 109 for Single-Stage Modulators for Multistage Modulators 3.8.1 Dither Topologies 3.8.2 Dither Topologies Empirical Studies of Noise-Shaped Dithering 112 3.9.1 3.9.2 3.9.3 3.9.4 3.9.5 Multistage Modulators Second-Order Modulator 112 Third-Order Modulator 116 Fifth-Order Modulator 118 Effect of Dither on Tones Near /,./2 119 120 3.10 Dither Generation 121 3.11 Dither inAID Modulators 121 Single-Stage 3.11.1 3.11.2 Multistage AID Modulators AID Modulator Example 121 121 3.12 Subtractive Noise-Shaped Dithering 123 3.13 Dynamic Noise-Shaped Dithering 124 3.13.1 Theory of Dynamic Dither 124 3.13.2 Implementation Considerations of Dynamic Dither 127 3.14 Dithered Multibit Noise-Shaping Coders 130 3.14.1 Stability Test with Dither 130 3.15 Chaos versus Noise-Shaped Dither 131 3.16 Other Techniques 3.17 Conclusion 135 136 References 134 Chapter 4 Stability Theory for ~L Modulators Robert W Adams and Richard Schreier 141 4.1 4.2 142 Introduction 141 Linear Analysis 4.2.1 4.2.2 4.2.3 Describing Function Method 145 The Linear Model 142 Root Locus ofa High-Order Modulator 144
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