An adaptive sigma-delta modulator with improved dynamic range

Chih Yuan Chen, Tai Yue Wang, Shuenn-Yuh Lee, Rong Guey Chang, Tsung Heng Tsai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper proposes a novel adaptive approach for sigmadelta modulators to significantly improve the dynamic range. Based on adjusting the signal power gain (SPG) of SDM, many dynamic-range (DR) curves can be obtained. A systematic approach with the proposed algorithm has been used to acquire the boundary constraints. Therefore, the wide dynamic range can be achieved without changing the original architecture and increasing the amount of hardware. A fourth order cascade of resonators with distributed feedback (CRFB) structure has been adopted to demonstrate the proposed method. This proposed method can be easily implemented by switched-capacitor circuits. The simulation results show that our work can really improve the dynamic range very well.

Original languageEnglish
Title of host publicationProceedings of the Fifth IASTED International Conference on Circuits, Signals, and Systems, CSS 2007
Pages245-248
Number of pages4
Publication statusPublished - 2007 Dec 1
Event5th IASTED International Conference on Circuits, Signals, and Systems, CSS 2007 - Banff, AB, Canada
Duration: 2007 Jul 22007 Jul 4

Publication series

NameProceedings of the Fifth IASTED International Conference on Circuits, Signals, and Systems, CSS 2007

Other

Other5th IASTED International Conference on Circuits, Signals, and Systems, CSS 2007
CountryCanada
CityBanff, AB
Period07-07-0207-07-04

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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