TY - GEN
T1 - A 23 μa RF-powered transmitter for biomedical applications
AU - Zhang, Fan
AU - Stoneback, Matthew A.
AU - Otis, Brian P.
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
KW - Biomedical telemetry
KW - RFID tags
KW - amplitude modulation
KW - amplitude shift keying
KW - body sensor networks
KW - injection-locked oscillators
KW - low-power electronics
KW - radio transmitters
KW - ring oscillators
UR - http://www.scopus.com/inward/record.url?scp=79960747646&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79960747646&partnerID=8YFLogxK
U2 - 10.1109/RFIC.2011.5940711
DO - 10.1109/RFIC.2011.5940711
M3 - Conference contribution
AN - SCOPUS:79960747646
SN - 9781424482931
T3 - Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium
BT - 2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011 - Digest of Papers
T2 - 2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011
Y2 - 5 June 2011 through 7 June 2011
ER -