Systematic design method for LC bandpass ΣΔ modulators with feedback FIRDACs

Nicolas Beilleau*, Abla Kammoun, Hassan Aboushady

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations

Abstract

In this paper, a generalized technique for the design automation of fs/4 LC bandpass ΣΔ modulators using feedback FIRDACs is proposed. The FIRDACs are used to increase the degrees of freedom in order to perform an exact equivalence with high order discrete-time ΣΔ modulators and also to allow a more efficient circuit implementation of the LC filter. The design technique is based on Discrete Time-Continuous Time equivalence simplified by using the method of partial fractions expansion. The excess loop delay is taken into account without making more difficult the calculations since we define how to get the orders of the FIRDACs. Several examples of design are simulated with different values of excess loop delay.

Original languageEnglish (US)
Title of host publicationISCAS 2006
Subtitle of host publication2006 IEEE International Symposium on Circuits and Systems, Proceedings
Pages1896-1899
Number of pages4
StatePublished - 2006
Externally publishedYes
EventISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems - Kos, Greece
Duration: May 21 2006May 24 2006

Other

OtherISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems
CountryGreece
CityKos
Period05/21/0605/24/06

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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