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

This book presents the study, design, modulation, optimization and implementation of low power, passive DT-Ms for use in audio applications. The high gain and bandwidth amplifier normally used for integration in 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.

Enables the design of a Sigma Delta modulator, an oversampling converter, for audio and biomedical applications Describes methods for minimizing both circuit area and power dissipation Presents techniques that use passive integrators based on the ultra-incomplete settling concept, employing a switched capacitor topology, eliminating the need for a high gain amplifier Includes supplementary material: sn.pub/extras Includes supplementary material: sn.pub/extras

Autorentext
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.

Inhalt
Introduction.- Sigma-Delta Modulation.- Architecture and High Level Model.- Electrical Circuits and Simulation Results.- Conclusions.- References.<p