Wirelessly-Powered Printed Temperature Sensor with an Ultra-Low-Power and High-Sensitivity CMOS Readout IC

Shao Yung Lu, I. Feng Wu, Ying Chih Liao, Yu Te Liao

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents a wirelessly-powered high-sensitivity printed temperature sensor (TS). The proposed system consists of a -17dBm sensitivity RF-DC conversion circuit, a 2.2 μW readout interface, and a printed NiO thermistor sensor. The 1 mm2 printed NiO film has a good sensitivity index (B value) of 4000 K, but has high resistance (MΩ). The conventional readout system has difficulty detecting small resistance changes in the large thermal resistance range while only consuming a few microwatts, which is a need for enabling RF -power sensors remotely. A low-noise readout IC was designed to convert the resistance changes to digital codes. The proposed TS achieves a resolution of 0.04°C/code in a temperature range of -20°C to 90°C, and measurement deviation within ±1.1%, while consuming only 2.2 nJ per conversion.

Original languageEnglish
Title of host publication17th IEEE International New Circuits and Systems Conference, NEWCAS 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728110318
DOIs
StatePublished - Jun 2019
Event17th IEEE International New Circuits and Systems Conference, NEWCAS 2019 - Munich, Germany
Duration: 23 Jun 201926 Jun 2019

Publication series

Name17th IEEE International New Circuits and Systems Conference, NEWCAS 2019

Conference

Conference17th IEEE International New Circuits and Systems Conference, NEWCAS 2019
CountryGermany
CityMunich
Period23/06/1926/06/19

Keywords

  • CMOS
  • low noise
  • low power
  • temperature sensor

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