A 0.9-V 60-mu W 1-bit fourth-order delta-sigma modulator with 83-dB dynamic range
- Authors
- Roh, Jeongjin; Byun, Sanho; Choi, Youngkil; Roh, HyLingdong; Kim, Yi-Gyeong; Kwon, Jong-Kee
- Issue Date
- Feb-2008
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- low power; low voltage; operational transconductance amplifier; sigma-delta modulation; switched capacitator circuits
- Citation
- IEEE JOURNAL OF SOLID-STATE CIRCUITS, v.43, no.2, pp.361 - 370
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE JOURNAL OF SOLID-STATE CIRCUITS
- Volume
- 43
- Number
- 2
- Start Page
- 361
- End Page
- 370
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/42688
- DOI
- 10.1109/JSSC.2007.914266
- ISSN
- 0018-9200
- Abstract
- A 0.9-V 60-mu W delta-sigma modulator is designed using standard CMOS 0.13-mu m 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-I-V modulators.
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