Design of efficient digital interpolation filters and sigma-delta modulator for audio DAC

Author

Ameur, Noura Ben ; Loulou, Mourad

Author_Institution

Dept. of Electr. Eng., Nat. Eng. Sch. of Sfax, Sfax

fYear

2008

fDate

25-27 March 2008

Firstpage

1

Lastpage

7

Abstract

A narrowband sigma-delta (SigmaDelta) audio digital-to-analog converter (DAC) with a digital signal interpolation part and single loop, 5-bit SigmaDelta modulator in the final stage is developed. To reduce sensitivity of digital-to-analog converter (DAC) nonlinearities of the last stage, dynamic element matching (DEM) is introduced. This paper presents a MATLAB description modelling approach of the proposed DAC architecture. The SigmaDelta modulator design can be configured as a 3^rd or 5^th order and allows 24-bit PCM at sampling rate of 64 kHz for DVD audio application.

Keywords

digital filters; digital-analogue conversion; mathematics computing; sigma-delta modulation; MATLAB; audio digital-to-analog converter; digital interpolation filters; digital signal interpolation; dynamic element matching; sigma-delta modulator; word length 5 bit; Delta-sigma modulation; Digital filters; Digital modulation; Digital-analog conversion; Interpolation; MATLAB; Mathematical model; Narrowband; Phase change materials; Sampling methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Design and Technology of Integrated Systems in Nanoscale Era, 2008. DTIS 2008. 3rd International Conference on

Conference_Location

Tozeur

Print_ISBN

978-1-4244-1576-2

Electronic_ISBN

978-1-4244-1577-9

Type

conf

DOI

10.1109/DTIS.2008.4540251

Filename

4540251