A 0.8-V 816-nW delta-sigma modulator for low-power biomedical applications
- Title
- A 0.8-V 816-nW delta-sigma modulator for low-power biomedical applications
- Author
- 노정진
- Keywords
- Delta-sigma modulator; Switched-capacitor circuit; Biomedical circuit; Oversampling; Analog-to-digital converter (ADC); Analog circuit design
- Issue Date
- 2010-04
- Publisher
- SPRINGER
- Citation
- ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, v. 63, NO. 1, Page. 101-106
- Abstract
- This letter discusses the implementation of a low-voltage, low-power delta-sigma modulator as a sensing stage for biomedical applications. A distributed feed-forward structure and bulk-driven operational transconductance amplifier are used in order to achieve efficient operation at a supply voltage of 0.8 V. Instead of conventional low-voltage amplifier architectures, our design uses folded-cascode amplifiers, although they are not used in most low-voltage circuits. A wide input swing is achieved by using the bulk-driven approach, and the drawback of the limited voltage swing of the cascoded output stage is overcome by the distributed feed-forward modulator. The designed modulator has a dynamic range of 49 dB at a 0.8-V supply voltage and consumes only 816 nW of power for the 250-Hz bandwidth. The core chip size of the modulator is 1000 mu m 9 500 mu m by using the 0.18-mu m standard CMOS process.
- URI
- https://link.springer.com/article/10.1007/s10470-009-9390-yhttps://repository.hanyang.ac.kr/handle/20.500.11754/183473
- ISSN
- 0925-1030;1573-1979
- DOI
- 10.1007/s10470-009-9390-y
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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