A 23 μa RF-powered transmitter for biomedical applications

Fan Zhang, Matthew A. Stoneback, Brian P. Otis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

19 Scopus citations

Abstract

We propose a new tag architecture that employs an active transmitter to decouple the frequencies used for power and data telemetry. Receiving power at 918 MHz and transmitting data at 306 MHz eliminates the "self-jamming" problem presented to RFID readers, reducing the complexity of reader design. This scheme allows remote placement of the data receiver and extends the data transmission range. Our transmitter uses subharmonic injection-locking to avoid power hungry LO generation circuitry while eliminating the need for quartz crystals. The tag prototype was fabricated using a 0.13 μm CMOS process, occupying 0.3 mm2 active area. With an on-off keying (OOK) data rate of 4 Mbps, the 23 μA transmitter with an output power of -33 dBm achieves an energy efficiency of 10 pJ/bit, the best reported to date for such systems.

Original languageEnglish (US)
Title of host publication2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011 - Digest of Papers
DOIs
StatePublished - Aug 1 2011
Event2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011 - Baltimore, MD, United States
Duration: Jun 5 2011Jun 7 2011

Publication series

NameDigest of Papers - IEEE Radio Frequency Integrated Circuits Symposium
ISSN (Print)1529-2517

Other

Other2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011
CountryUnited States
CityBaltimore, MD
Period6/5/116/7/11

Keywords

  • Biomedical telemetry
  • RFID tags
  • amplitude modulation
  • amplitude shift keying
  • body sensor networks
  • injection-locked oscillators
  • low-power electronics
  • radio transmitters
  • ring oscillators

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