A 1.5-V-100-μW ΔΣ modulator with 12-b dynamic range using the switched-opamp technique

Author

Peluso, Vincenzo ; Steyaert, Michiel S J ; Sansen, Willy

Author_Institution

Katholieke Univ., Leuven, Heverlee, Belgium

Volume

32

Issue

7

fYear

1997

fDate

7/1/1997 12:00:00 AM

Firstpage

943

Lastpage

952

Abstract

The design and implementation of a very low supply voltage/low power ΔΣ modulator is presented. It is based on the switched-opamp technique, which allows low voltage operation with a standard process and without voltage multiplication. The design methodology is illustrated with a second-order single-loop ΔΣ modulator. The chip is implemented in a 0.7-μm CMOS process with standard threshold voltages. The power supply is 1.5 V and the power dissipation is only 100 μW. The measured dynamic range in the speech bandwidth of 300-3400 Hz is 12 b. The total harmonic distortion (THD) is lower than -72 dB

Keywords

CMOS integrated circuits; operational amplifiers; sigma-delta modulation; switched capacitor networks; 0.7 micron; 1.5 V; 100 muW; 300 to 3400 Hz; CMOS chip; design; dynamic range; low voltage low power operation; second-order single-loop ΔΣ modulator; speech bandwidth; switched-opamp technique; threshold voltage; total harmonic distortion; CMOS process; Delta modulation; Design methodology; Distortion measurement; Dynamic range; Low voltage; Power dissipation; Power supplies; Semiconductor device measurement; Threshold voltage;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.597284

Filename

597284