New ΣΔ Cascade Modulators for the Next Generation of Wireless Telecom

  • Alonso Morgado
  • Rocío del Río
  • José M. de la Rosa
Chapter

Abstract

THE MANDATORY USE OF LOW OSR s IN WIDEBAND STANDARDS has forced SDMs to achieve the required DRs by resorting to different strategies, namely: high-order shaping—that can be implemented with high-order single-loop SDMs or, alternatively, by cascading low-order stages—and multi-bit embedded quantizers—that leads to the use of multi-bit DACs and DEM for medium-to-high ENOB specifications. A different approach, fully compatible with the former strategies, is based on the optimal spreading of notches within the signal band to increase ENOB [Schr93].

Keywords

Settling 

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Alonso Morgado
    • 1
  • Rocío del Río
    • 1
  • José M. de la Rosa
    • 1
  1. 1.Instituto de Microelectrónica de Sevilla Centro Nacional de Microelectrónica IMSE-CNM(CSIC/Universidad de Sevilla)SevillaSpain

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