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A 290-μW 25-kHz continuous-time delta-sigma modulator for acoustic sensor networks
- Choi, Youngkil;
- Kim, Hyungjoong;
- Roh, Hyungdong ;
- Roh, Jeongjin
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2초록
This paper presents the design of a continuous-time delta-sigma (ΔΣ) modulator for acoustic sensor networks. A feed-forward structure without a summing block is used to reduce the power consumption of the ΔΣ modulator. A high-linearity active-RC filter is used to improve the resolution of the ΔΣ modulator. A low-power, high-resolution fourth-order continuous-time ΔΣ modulator with 1-bit quantization was developed by using 0.13-μm, 1-poly 8-metal CMOS technology, with a core area of 0.58 mm2. Simulation results show that the modulator achieved 91.3-dB SNDR (signal-to-noise plus distortion ratio) over a 25-kHz signal bandwidth with an oversampling ratio of 64, while dissipating 290 μW of power from a 3.3-V supply. ©2009 IEEE.
키워드
Acoustic Sensors; High resolution; Delta sigma modulator; Continuous time; Continuous time systems; Electric power supplies to apparatus; Modulators; Application specific integrated circuits; Acoustic devices; Low Power; Modulation; Sensor networks; CMOS
- 제목
- A 290-μW 25-kHz continuous-time delta-sigma modulator for acoustic sensor networks
- 저자
- Choi, Youngkil; Kim, Hyungjoong; Roh, Hyungdong ; Roh, Jeongjin
- 발행일
- 2009-10
- 저널명
- 2009 IEEE 8th International Conference on ASIC
- 페이지
- 447 ~ 450
- 언어
- ENG
- 출판사
- IEEE
- 발행국가
- 미국
- 분량
- 4 페이지