Systematic Design of CMOS Switched-Current Bandpass Sigma-Delta Modulators for Digital Communication Chips

Systematic Design of CMOS Switched-Current Bandpass Sigma-Delta Modulators for Digital Communication Chips discusses architectures, circuits and procedures for the optimum design of bandpass sigma-delta (SD) A/D interfaces for mixed-signal chips in standa

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Systematic Design of CMOS Switched-Current Bandpass Sigma-Delta Modulators for Digital Communication Chips by

José M. de la Rosa University of Seville, Spain

Belén Pérez-Verdú University of Seville, Spain

and

Angel Rodríguez-Vázquez University of Seville, Spain

KLUWER ACADEMIC PUBLISHERS NEW YORK, BOSTON, DORDRECHT, LONDON, MOSCOW

eBook ISBN: Print ISBN:

0-306-48194-4 0-7923-7678-1

©2004 Kluwer Academic Publishers New York, Boston, Dordrecht, London, Moscow Print ©2002 Kluwer Academic Publishers Dordrecht All rights reserved

No part of this eBook may be reproduced or transmitted in any form or by any means, electronic, mechanical, recording, or otherwise, without written consent from the Publisher

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Contents

List of Figures

xiii

List of Tables

xxiv

Preface

xxv

Acknowledgments

xxvii

Prologue

xxix

Chapter 1: Bandpass Sigma-Delta A/D Converters – Fundamentals and State-of-the-Art 1.1 Introduction 1.2 Analog-to-digital interfaces for digital radio receivers 1.3 Analog-to-Digital Conversion: Fundamentals 1.3.1 Sampling 1.3.2 Quantization

1.4 Oversampling

6 8

Analog-to-Digital Converters

1.4.1 Basic architecture of a modulator 1.4.2 Figures of merit 1.4.2.1 Signal-to-noise ratio 1.4.2.2 Dynamic range and effective resolution 1.4.3 First-order lowpass modulator 1.4.4 Lowpass modulator architectures 1.4.5 Second-order lowpass Modulator 1.4.6 High-order lowpass modulators 1.4.7 Multi-bit lowpass modulators

1.5 Bandpass

1 2 5

11 13 13 13 14 16 17 18 22

23

modulators

1.5.1 Quantization noise shaping of bandpass 1.5.2 Signal passband location

1.6 Synthesis of bandpass

10

modulators

modulator architectures

1.6.1 The Lowpass-to-bandpass transformation method 1.6.1.1 Pattern noise of second-order bandpass 1.6.2 Other lowpass-to-bandpass transformations

modulators

25 28

30 30 33 35

viii

36

1.6.3 Optimized synthesis of 1.6.4 Quadrature bandpass modulators 1.6.5 N-path bandpass modulators 1.6.6 Continuous-time bandpass modulators

1.7 Decimation for bandpass 1.8 State-of-the-art bandpass

37 41 43

46 48

ADCs ADCs

Chapter 2: Switched-Current Building Blocks for

Modulators

2.1 Introduction 2.2 Principle of Operation: The Current Memory Cell 2.3 SI Integrators 2.3.1 Review of discrete-time integrators 2.3.2 SI delay elements 2.3.3 SI non-inverting integrators 2.3.4 SI inverting integrators 2.3.5 Generalized SI integrators

2.4 SI Differentiators 2.4.1 Discrete-time differentiators 2.4.2 Inverting SI differentiators 2.4.3 Non-inverting SI differentiators 2.4.4 Bilinear SI differentiators

2.5 SI Resonators 2.5.1 Biquad filter background 2.5.2 Discrete-time resonators 2.5.2.1 Resonator structures based on differentiators and integrators 2.5.2.2 Delay element based resonators 2.5.3 SI Resonators 2.5.3.1 SI LDI loop resonators 2.5.3.2 SI FE loop resonators 2.5.3.3 SI delay l