A design strategy for low-voltage low-power continuous-time ΣΔ A/D converters

Author

Gerfers, Friedel ; Manoli, Yiannos

Author_Institution

Inst. of Microelectron., Saarlandes Univ., Saarbrucken, Germany

fYear

2001

fDate

2001

Firstpage

361

Lastpage

368

Abstract

This paper presents a design strategy for low-voltage low-power ΣΔ analog-to-digital (A/D) converter using a continuous-time (CT) lowpass loop filter. An improved method is used to find the optimal ΣΔ modulator implementation with respect to a minimal power consumption on the one hand and to fulfil a rapid prototyping approach on the other hand. The influence of the low supply voltage as well as circuit nonidealities on the overall ΣΔ modulator is determined and verified by behavioral simulations. Transistor-level simulation results of a 1.5 V CT ΣΔ A/D converter show a 75 dB dynamic range in a bandwidth of 25 kHz

Keywords

CMOS integrated circuits; circuit CAD; continuous time filters; integrated circuit design; low-power electronics; mixed analogue-digital integrated circuits; rapid prototyping (industrial); sigma-delta modulation; 1.5 V; 25 kHz; LV ΣΔ A/D converters; analog-to-digital converter; behavioral simulations; circuit nonidealities; continuous-time ΣΔ ADCs; continuous-time lowpass loop filter; design strategy; low-power ADC; low-voltage ADC; minimal power consumption; optimal ΣΔ modulator implementation; rapid prototyping approach; Analog-digital conversion; Bandwidth; Batteries; Circuit simulation; Dynamic range; Energy consumption; Filters; Low voltage; Medical simulation; Prototypes;

fLanguage

English

Publisher

ieee

Conference_Titel

Design, Automation and Test in Europe, 2001. Conference and Exhibition 2001. Proceedings

Conference_Location

Munich

ISSN

1530-1591

Print_ISBN

0-7695-0993-2

Type

conf

DOI

10.1109/DATE.2001.915050

Filename

915050