An Ultra-Low Power Variable-Resolution Sigma-Delta Modulator for Signals Acquisition of Biomedical Instrument(Electronic Circuits)

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概要

• 論文の詳細を見る

• In this paper, an ultra-low power variable-resolution sigma-delta (ΣΔ) modulator for biomedical application is presented. The resolution of proposed modulator can be adjusted by switching its sampling frequency and architecture. The architecture is switched between second-order single-loop modulator and fourth-order cascaded second stage noise shaped modulator to reach different resolution requirement. The proposed sigma-delta modulator is implemented by single phase integrators based on a fully differential switched-capacitor circuit. The digital cancellation logic is embedded in the chip so that it would easily be integrated with biomedical instrument for effective acquisition. Experimental results of the proposed variable-resolution ΣΔ modulator fabricated in standard CMOS 0.18μm technology confirm the expected specifications from 65dB signal-to-noise distortion to 96dB with 1kHz bandwidth and power consumption range from 48μW to 360μW with a 1.8V battery supply.

• 社団法人電子情報通信学会の論文
• 2007-09-01

著者

• Hsu Chen-ming

  Wireless Mixed Biochip Laboratory Ee Ncku

• Luo Ching-hsing

  Wireless Mixed Biochip Lab. E.e. N.c.k.u.

• Luo Ching-hsing

  Wireless Mixed Biochip Laboratory Ee Ncku

• YO Tzong

  Wireless Mixed Biochip Laboratory, EE, NCKU

• Yo Tzong

  Wireless Mixed Biochip Laboratory Ee Ncku

関連論文

• A CMOS Smart Thermal Sensor for Biomedical Application
• An Ultra-Low Power Variable-Resolution Sigma-Delta Modulator for Signals Acquisition of Biomedical Instrument(Electronic Circuits)

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