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

Publication: Research - peer-reviewBook chapter – Annual report year: 2012

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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
StatePublished

Conference

Conference2012 8th Conference on Ph.D. Research in Microelectronics and Electronics
CountryGermany
CityAachen
Period12/06/1215/06/12

Keywords

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