A 3-μ\hboxW CMOS Glucose Sensor for Wireless Contact-Lens Tear Glucose Monitoring

2011/11/07 by Yu-Te Liao, Yu‐Te Liao, Huanfen Yao +5 · 27 citations
Engineering · #Wireless Body Area Networks #Wireless Power Transfer Systems #Advanced Sensor and Energy Harvesting Materials

paper · doi:10.1109/jssc.2011.2170633

Abstract

This paper presents a noninvasive wireless sensor platform for continuous health monitoring. The sensor system integrates a loop antenna, wireless sensor interface chip, and glucose sensor on a polymer substrate. The IC consists of power management, readout circuitry, wireless communication interface, LED driver, and energy storage capacitors in a 0.36-mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> CMOS chip with no external components. The sensitivity of our glucose sensor is 0.18 μA·mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> ·mM <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> . The system is wirelessly powered and achieves a measured glucose range of 0.05-1 mM with a sensitivity of 400 Hz/mM while consuming 3 μW from a regulated 1.2-V supply.

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