Design techniques for micropower low-voltage 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

3

fYear

2004

fDate

25-28 July 2004

Abstract

The design of a micropower, low-voltage switched-capacitor delta-sigma modulator that consumes only 90 μW 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 88 dB dynamic range and a peak signal to noise plus total harmonic distortion ratio of 67.1 dB with a sampling rate of 1 MHz and an oversampling ratio of 128.

Keywords

CMOS integrated circuits; circuit simulation; delta-sigma modulation; harmonic distortion; integrated circuit design; low-power electronics; switched capacitor networks; switches; 1 MHz; 1.5 V; 90 muW; CMOS delta-sigma modulator; bootstrapped switches; circuit simulation; low power dissipation; low voltage delta-sigma modulator; micropower delta-sigma modulator; switched capacitor delta-sigma modulator; total harmonic distortion ratio; transistors; 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. MWSCAS '04. The 2004 47th Midwest Symposium on

Print_ISBN

0-7803-8346-X

Type

conf

DOI

10.1109/MWSCAS.2004.1354362

Filename

1354362