Low-voltage sigma-delta modulator topologies for broadband applications

Author

Yavari, Mohammad ; Shoaei, Omid

Author_Institution

Dept. of Electr. & Comput. Eng.,, Tehran Univ., Iran

Volume

1

fYear

2004

fDate

23-26 May 2004

Abstract

This paper proposes a class of sigma-delta modulator topologies for low-voltage, high-speed, and high-resolution applications with low oversampling ratios (OSRs). The main specifications of these architectures are the reduced analog circuit requirements, large out-of-band gain in the noise transfer function (NTF) without any stability concerns to achieve high signal to noise ratio (SNR) with a low OSR, and unity-gain signal transfer function (STF) to reduce the harmonic distortions resulted from the analog circuit imperfections.

Keywords

analogue circuits; high-speed integrated circuits; low-power electronics; modulators; network topology; sigma-delta modulation; analog circuits; broadband applications; harmonic distortion reduction; high-resolution applications; high-speed applications; low-voltage applications; noise transfer function; out-of-band gain; oversampling ratio; sigma-delta modulator topology; signal to noise ratio; signal transfer function; unity-gain; Analog circuits; Circuit noise; Circuit stability; Delta-sigma modulation; Noise reduction; Noise shaping; Quantization; Signal resolution; Signal to noise ratio; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on

Print_ISBN

0-7803-8251-X

Type

conf

DOI

10.1109/ISCAS.2004.1328232

Filename

1328232