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A 89-dB DR 457-mu W 20-kHz bandwidth delta-sigma modulator with gain-boosting OTAs

Authors
Roh, HyungdongChoi, YoungkilRoh, Jeongjin
Issue Date
Aug-2010
Publisher
SPRINGER
Keywords
Analog-to-digital data converter; Sigma delta modulator; Operational transconductance amplifier
Citation
ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, v.64, no.2, pp.173 - 182
Indexed
SCIE
SCOPUS
Journal Title
ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING
Volume
64
Number
2
Start Page
173
End Page
182
URI
https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/39623
DOI
10.1007/s10470-009-9431-6
ISSN
0925-1030
Abstract
This paper presents a low-power, high-resolution delta-sigma modulator for use in portable devices. The modulator architecture uses a mixed-loop topology, having both feedback and feedforward paths. A new fully differential operational transconductance amplifier is designed that has a higher slew rate and a higher dc gain than conventional amplifiers. A 0.5-mm(2) modulator chip is implemented in a standard 0.25-mu m CMOS process and operates with a 1.5-V power supply. Measurement results demonstrate a 89-dB dynamic range in a 20-kHz bandwidth with only 457 mu W of power consumption.
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COLLEGE OF ENGINEERING SCIENCES > SCHOOL OF ELECTRICAL ENGINEERING > 1. Journal Articles

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ERICA 공학대학 (SCHOOL OF ELECTRICAL ENGINEERING)
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