A simple wireless intra-oral thermometry -A denture with a CMOS Chip-

Tomohiro Ishikawa, Takunari Kunimasa, Nobuo Sasaki, Yuji Murakami, Takeshi Yoshida, Kazuhiro Tsuga

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


A wireless intra-oral device has been fabricated to measure the temperature in a mouth. It contains a silicon CMOS chip attached printed circuit board and a button battery. A ring oscillator on the chip generates continuous wave which frequency depends on ambient temperature. The frequency shift is detected by a short wave radio wirelessly at the distance of 30 cm. The circuit draws 51 μfrom a 1.55 V silver-oxide button battery for watches and it gives more than ten days running time.

Original languageEnglish
Pages (from-to)6-10
Number of pages5
JournalIEEJ Transactions on Sensors and Micromachines
Issue number1
Publication statusPublished - 2010


  • Denture
  • Intra-oral temperature
  • Non-invasive diagnosis hiroshima university
  • Thermometry
  • Wireless

ASJC Scopus subject areas

  • Mechanical Engineering
  • Electrical and Electronic Engineering


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