A 89-dB DR 457-mu W 20-kHz bandwidth delta-sigma modulator with gain-boosting OTAs
- Title
- A 89-dB DR 457-mu W 20-kHz bandwidth delta-sigma modulator with gain-boosting OTAs
- Author
- 노정진
- Keywords
- Analog-to-digital data converter; Sigma delta modulator; Operational transconductance amplifier
- Issue Date
- 2010-08
- Publisher
- SPRINGER
- Citation
- ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, v. 64, NO. 2, Page. 173-182
- 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.
- URI
- https://link.springer.com/article/10.1007/s10470-009-9431-6https://repository.hanyang.ac.kr/handle/20.500.11754/183429
- ISSN
- 0925-1030;1573-1979
- DOI
- 10.1007/s10470-009-9431-6
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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