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A 89-dB DR 457-mu W 20-kHz bandwidth delta-sigma modulator with gain-boosting OTAs
- Authors
- Roh, Hyungdong; Choi, Youngkil; Roh, 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
- Pages
- 10
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING
- Volume
- 64
- Number
- 2
- Start Page
- 173
- End Page
- 182
- ISSN
- 0925-1030
1573-1979
- 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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Related Researcher
- Roh, Jeong jin
- ERICA 공학대학 (SCHOOL OF ELECTRICAL ENGINEERING)