Design of Low Power and Low Area Passive Sigma Delta Modulators for Audio Applications

1. Auflage 2017
ISBN: 978-3-319-57032-7
Verlag: Springer

Buch, Englisch, 78 Seiten, Format (B × H): 155 mm x 235 mm, Gewicht: 1474 g

Reihe: SpringerBriefs in Electrical and Computer Engineering

This book presents the study, design, modulation, optimization and implementation of low power, passive DT-S?Ms for use in audio applications. The high gain and bandwidth amplifier normally used for integration in S? modulation, is replaced by passive, switched-capacitor branches working under the Ultra Incomplete Settling (UIS) condition, leading to a reduction of the consumed power. The authors describe a design process that uses high level models and an optimization process based in genetic algorithms to achieve the desired performance.

Zielgruppe

Research

Autoren/Hrsg.

Fouto, David

Paulino, Nuno

Fachgebiete

• Technische Wissenschaften Elektronik | Nachrichtentechnik Nachrichten- und Kommunikationstechnik Signalverarbeitung
• Technische Wissenschaften Elektronik | Nachrichtentechnik Elektronik Bauelemente, Schaltkreise

Inhaltsverzeichnis

1 Introduction 1.1 Motivation and Background 1.2 Book Organization2 Sigma-Delta Modulation 2.1 Introduction 2.2 First Order Sigma-Delta Modulator 2.3 Second Order Sigma-Delta Modulator 2.4 Higher Order Sigma-Delta Modulator 2.4.1 The MASH Structure3 Architecture and High Level Model 3.1 Passive Integrator 3.1.1 Ultra Incomplete Settling 3.1.2 Discrete Time Transfer Function of the SC Integrator 3.1.3 Thermal Noise Analysis 3.2 Modulator Block Diagram 3.2.1 Signal and Noise Transfer Functions 3.3 Proposed Architecture 3.4 High Level Model 3.5 Optimization 3.6 Reducing the Size of the Capacitors4 Electrical Circuits and Simulation Results 4.1 Introduction 4.2 Digital Circuitry 4.2.1 Logic Gates 4.2.2 Delay Circuits 4.2.3 Phase Generator 4.2.4 Flip-Flop 4.3 Amplifiers 4.3.1 Gain G2 4.3.2 Gain Gmid 4.4 Comparator 4.5 Switching Circuitry 4.5.1 Clock Bootstrapped Switch 4.6 Feedback and Reference Voltages 4.7 Monostable Circuit 4.8 Simulation Results 4.8.1 Second Order S? Modulator 4.8.2 Third Order MASH S? Modulator 4.8.3 Third Order MASH S?M with Monostable Circuit5 Conclusions 5.1 Final RemarksReferences

Über Autor(innen)

David Fouto is a researcher in the Department of Electrical Engineering, Faculdade de Ciências e Tecnologia of the Universidade Nova de Lisboa, Portugal.

Nuno Paulino is a Professor in the Department of Electrical Engineering, Faculdade de Ciências e Tecnologia of the Universidade Nova de Lisboa, Portugal.