Implementing a /spl Sigma/ /spl Delta/ DAC in Fixed Point Arithmetic

Author

Engelberg, Shlomo

Author_Institution

Dept. of Electron., Jerusalem Coll. of Technol.

Volume

23

Issue

6

fYear

2006

Firstpage

66

Lastpage

69

Abstract

This paper describes a simple sigma delta (SigmaDelta) digital to analog converter (DAC) that is suitable for use on the simplest of microprocessors to generate constant level or slowly varying control voltages by taking advantage of a SigmaDelta network´s intrinsic limit cycle behavior. The paper describes the properties of the converter, and shows that it is inherently stable. It also explains how the user can control the dc level of the DAC´s analog output, and discusses the implementation of such a DAC on an industry standard microprocessor

Keywords

digital-analogue conversion; fixed point arithmetic; limit cycles; DAC analog output; SigmaDelta DAC; SigmaDelta network intrinsic limit cycle behavior; dc level; fixed point arithmetic; industry standard microprocessor; sigma delta digital-to-analog converter; slowly varying control voltages; Automata; Delta-sigma modulation; Digital-analog conversion; Electrical equipment industry; Equations; Fixed-point arithmetic; Limit-cycles; Low pass filters; Microprocessors; Voltage control;

fLanguage

English

Journal_Title

Signal Processing Magazine, IEEE

Publisher

ieee

ISSN

1053-5888

Type

jour

DOI

10.1109/SP-M.2006.248716

Filename

4015569