A 3-μW CMOS glucose sensor for wireless contact-lens tear glucose monitoring

Yu-Te Liao, Huanfen Yao, Andrew Lingley, Babak Parviz, Brian P. Otis

Research output: Contribution to journalArticlepeer-review

234 Scopus citations


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-mm2 CMOS chip with no external components. The sensitivity of our glucose sensor is 0.18 μA·mm-2·mM-1. 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.

Original languageEnglish
Article number6071020
Pages (from-to)335-344
Number of pages10
JournalIEEE Journal of Solid-State Circuits
Issue number1
StatePublished - 1 Jan 2012


  • Contact lens
  • glucose sensor
  • heterogeneous integration
  • low power
  • noninvasive
  • potentiostat
  • wireless health monitoring

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