A 0.9-V 60-μW 1-Bit Fourth-Order Delta-Sigma Modulator With 83-dB Dynamic Range

Author

Roh, Jeongjin ; Byun, Sanho ; Choi, Youngkil ; Roh, Hyungdong ; Kim, Yi-Gyeong ; Kwon, Jong-Kee

Author_Institution

Hanyang Univ., Ansan

Volume

43

Issue

2

fYear

2008

Firstpage

361

Lastpage

370

Abstract

A 0.9-V 60-muW delta-sigma modulator is designed using standard CMOS 0.13-mum technology. The modulator achieves 83-dB dynamic range in a signal bandwidth of 20 kHz with a sampling frequency of 2 MHz. The input-feedforward architecture is used to reduce the voltage swing of the integrators, which enables low-power amplifiers. By considering the characteristics of the modulator architecture, low-quiescent operational transconductance amplifiers are designed, which use positive feedback to increase dc gain. The designed modulator shows very high figure of merit among the state-of-the-art sub-l-V modulators.

Keywords

CMOS integrated circuits; amplifiers; delta-sigma modulation; CMOS technology; bandwidth 20 kHz; delta-sigma modulator; frequency 2 MHz; input-feedforward architecture; low-power amplifier; low-quiescent operational transconductance amplifier; modulator architecture; power 60 muW; sampling frequency; signal bandwidth; size 0.13 micron; switched capacitor circuit; voltage 0.9 V; voltage swing; Bandwidth; CMOS technology; Delta modulation; Dynamic range; Feedback; Frequency; Operational amplifiers; Sampling methods; Transconductance; Voltage; Low power; low voltage; operational transconductance amplifier; sigma-delta modulation; switched capacitator circuits;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2007.914266

Filename

4444579