∑∆ Modulator System-Level Considerations for Hearing-Aid Audio Class-D Output Stage Application

Peter Pracný, Erik Bruun

Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

Abstract

This paper deals with a system-level design of a digital sigma-delta (∑∆) modulator for hearing-aid audio Class D output stage application. The aim of this paper is to provide a thorough discussion on various possibilities and tradeoffs of ∑∆ modulator system-level design parameter combinations - order, oversampling ratio (OSR) and number of bits in the quantizer - including their impact on interpolation filter design as well. The system is kept in digital domain up to the input of the Class D power stage including the digital pulse width modulation (DPWM) block. Notes on the impact of the DPWM block on the modulated spectrum are provided.
Original languageEnglish
Title of host publication8th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME)
PublisherIEEE
Publication date2012
Pages103-106
Publication statusPublished - 2012
Event2012 8th Conference on Ph.D. Research in Microelectronics and Electronics - RWTH Aachen University, Aachen, Germany
Duration: 12 Jun 201215 Jun 2012

Conference

Conference2012 8th Conference on Ph.D. Research in Microelectronics and Electronics
LocationRWTH Aachen University
CountryGermany
CityAachen
Period12/06/201215/06/2012

Keywords

  • Sigma-Delta modulator
  • Interpolation filter
  • Class D
  • Hearing aid
  • Low voltage, low power

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