Design techniques for low-voltage micropower CMOS switched-capacitor delta-sigma modulator

Author

Lee, Tsung-Sum ; Lin, Wen-Bin ; Lee, Dung-Lin

Author_Institution

Dept. of Electron. Eng., Nat. Yunlin Univ. of Sci. & Technol., Taiwan

Volume

1

fYear

2004

fDate

6-9 Dec. 2004

Firstpage

249

Abstract

The design of a low-voltage micropower switched-capacitor delta-sigma modulator that consumes only 90μW at 1.5 V supply is described. The modulator is designed employing bootstrapped switches in order to facilitate low voltage operation. Low power dissipation is obtained through the use of biasing some transistors in weak inversion. The delta-sigma modulator achieves an 88dB dynamic range and a peak signal to noise plus total harmonic distortion ratio of 67.1 dB with a sampling rate of 1MHz and an oversampling ratio of 128.

Keywords

CMOS integrated circuits; bootstrap circuits; delta-sigma modulation; low-power electronics; switched capacitor networks; 1.5 V; 90 muW; CMOS switched-capacitor delta-sigma modulator; bootstrapped switches; low power dissipation; low voltage operation; low-voltage micropower delta-sigma modulator; weak inversion; Bandwidth; Clocks; Delta modulation; Dynamic range; Low voltage; Operational amplifiers; PSNR; Switches; Switching circuits; Total harmonic distortion;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on

Print_ISBN

0-7803-8660-4

Type

conf

DOI

10.1109/APCCAS.2004.1412740

Filename

1412740