Abstract:
We present the design of an ultra-low power, wireless pressure/temperature sensing device for continuous intraocular pressure monitoring. The device is wirelessly powered...Show MoreMetadata
Abstract:
We present the design of an ultra-low power, wireless pressure/temperature sensing device for continuous intraocular pressure monitoring. The device is wirelessly powered and demonstrates a power consumption of 2.3 μW at 1.5 V during continuous monitoring. The chip converts both capacitance and temperature to frequency using a time-interleaved relaxation oscillator, which modulates RF backscatter to a reader for computation of measured samples. A significant reduction in power consumption results from the elimination of the digitization circuitry, time-multiplexed operation, and moving the signal processing burden to the external reader using analog IF-modulated backscatter. The chip exhibits measured capacitance and temperature standard deviations of 1.4 fF and 0.4°C, respectively.
Published in: IEEE Journal of Solid-State Circuits ( Volume: 46, Issue: 11, November 2011)
Department of Electrical Engineering, University of Washington, Seattle, WA, USA
Yi-Chun Shih (S'08) received the B.S. degree in physics in 2000 and the M.S. degree in optoelectronics in 2002, both from National Taiwan University. He is currently a Ph.D. candidate in electrical engineering at the University of Washington, Seattle.
From 2002 to 2007, he was with Macronix International Semiconductor Company, Ltd., Hsinchu, Taiwan, where he was a flash memory circuit designer and designed charge pump, con...Show More
Yi-Chun Shih (S'08) received the B.S. degree in physics in 2000 and the M.S. degree in optoelectronics in 2002, both from National Taiwan University. He is currently a Ph.D. candidate in electrical engineering at the University of Washington, Seattle.
From 2002 to 2007, he was with Macronix International Semiconductor Company, Ltd., Hsinchu, Taiwan, where he was a flash memory circuit designer and designed charge pump, con...View more
Department of Ophalmology, University of Washington, Seattle, WA, USA
Tueng Shen received the Ph.D. degree in medical engineering at the Massachusetts Institute of Technology (MIT), Cambridge, MA, in 1994, followed by the M.D. from Harvard Medical School in 1997.
Dr. Shen established the University of Washington's artificial cornea program. This was the first of its kind in the Northwest and has become one of the world's premier centers for the implantation of artificial cornea. Her research...Show More
Tueng Shen received the Ph.D. degree in medical engineering at the Massachusetts Institute of Technology (MIT), Cambridge, MA, in 1994, followed by the M.D. from Harvard Medical School in 1997.
Dr. Shen established the University of Washington's artificial cornea program. This was the first of its kind in the Northwest and has become one of the world's premier centers for the implantation of artificial cornea. Her research...View more
Department of Electrical Engineering, University of Washington, Seattle, WA, USA
Brian P. Otis (S'96–M'05–SM'10) received the B.S. degree in electrical engineering from the University of Washington, Seattle, and the M.S. and Ph.D. degrees in electrical engineering from the University of California, Berkeley.
He joined the faculty of the University of Washington as Assistant Professor of electrical engineering in 2005. His primary research interests are ultra-low power RFIC design, FBAR-based clocks, an...Show More
Brian P. Otis (S'96–M'05–SM'10) received the B.S. degree in electrical engineering from the University of Washington, Seattle, and the M.S. and Ph.D. degrees in electrical engineering from the University of California, Berkeley.
He joined the faculty of the University of Washington as Assistant Professor of electrical engineering in 2005. His primary research interests are ultra-low power RFIC design, FBAR-based clocks, an...View more
Contents Department of Electrical Engineering, University of Washington, Seattle, WA, USA
Yi-Chun Shih (S'08) received the B.S. degree in physics in 2000 and the M.S. degree in optoelectronics in 2002, both from National Taiwan University. He is currently a Ph.D. candidate in electrical engineering at the University of Washington, Seattle.
From 2002 to 2007, he was with Macronix International Semiconductor Company, Ltd., Hsinchu, Taiwan, where he was a flash memory circuit designer and designed charge pump, control logic, and read-out circuits for flash memory products. His current research interests include analog and RF integrated circuit designs for low power wireless sensors and biomedical devices.
Yi-Chun Shih (S'08) received the B.S. degree in physics in 2000 and the M.S. degree in optoelectronics in 2002, both from National Taiwan University. He is currently a Ph.D. candidate in electrical engineering at the University of Washington, Seattle.
From 2002 to 2007, he was with Macronix International Semiconductor Company, Ltd., Hsinchu, Taiwan, where he was a flash memory circuit designer and designed charge pump, control logic, and read-out circuits for flash memory products. His current research interests include analog and RF integrated circuit designs for low power wireless sensors and biomedical devices.View more
Department of Ophalmology, University of Washington, Seattle, WA, USA
Tueng Shen received the Ph.D. degree in medical engineering at the Massachusetts Institute of Technology (MIT), Cambridge, MA, in 1994, followed by the M.D. from Harvard Medical School in 1997.
Dr. Shen established the University of Washington's artificial cornea program. This was the first of its kind in the Northwest and has become one of the world's premier centers for the implantation of artificial cornea. Her research interests include building a bridge between engineers and physicians to facilitate the translation of innovative engineering technology to creative clinical solutions. Recently, her research group focuses on the development of the next generation of artificial cornea and intraocular devices to facilitate continuous monitoring of important ocular parameters and for better treatment of blindness worldwide. Her close collaboration with the college of engineering (where she holds an adjunct faculty position) has led to the development of a variety of medical devices including polymeric drug delivery systems for the eye and new biomaterials for artificial cornea. Dr. Shen's research is supported by NIH, NSF, and Research to Prevent Blindness (RPB).
Tueng Shen received the Ph.D. degree in medical engineering at the Massachusetts Institute of Technology (MIT), Cambridge, MA, in 1994, followed by the M.D. from Harvard Medical School in 1997.
Dr. Shen established the University of Washington's artificial cornea program. This was the first of its kind in the Northwest and has become one of the world's premier centers for the implantation of artificial cornea. Her research interests include building a bridge between engineers and physicians to facilitate the translation of innovative engineering technology to creative clinical solutions. Recently, her research group focuses on the development of the next generation of artificial cornea and intraocular devices to facilitate continuous monitoring of important ocular parameters and for better treatment of blindness worldwide. Her close collaboration with the college of engineering (where she holds an adjunct faculty position) has led to the development of a variety of medical devices including polymeric drug delivery systems for the eye and new biomaterials for artificial cornea. Dr. Shen's research is supported by NIH, NSF, and Research to Prevent Blindness (RPB).View more
Department of Electrical Engineering, University of Washington, Seattle, WA, USA
Brian P. Otis (S'96–M'05–SM'10) received the B.S. degree in electrical engineering from the University of Washington, Seattle, and the M.S. and Ph.D. degrees in electrical engineering from the University of California, Berkeley.
He joined the faculty of the University of Washington as Assistant Professor of electrical engineering in 2005. His primary research interests are ultra-low power RFIC design, FBAR-based clocks, and bioelectrical interface circuits and systems. He previously held positions at Intel Corporation and Agilent Technologies.
Dr. Otis has served as an Associate Editor of the IEEE Transactions on Circuits and Systems II. He received the U.C. Berkeley Seven Rosen Funds award for innovation in 2003, was co-recipient of the 2002 ISSCC Jack Raper Award for an Outstanding Technology Directions Paper, received the National Science Foundation CAREER award in 2009, and was awarded the University of Washington College of Engineering Junior Faculty Innovator Award in 2011.
Brian P. Otis (S'96–M'05–SM'10) received the B.S. degree in electrical engineering from the University of Washington, Seattle, and the M.S. and Ph.D. degrees in electrical engineering from the University of California, Berkeley.
He joined the faculty of the University of Washington as Assistant Professor of electrical engineering in 2005. His primary research interests are ultra-low power RFIC design, FBAR-based clocks, and bioelectrical interface circuits and systems. He previously held positions at Intel Corporation and Agilent Technologies.
Dr. Otis has served as an Associate Editor of the IEEE Transactions on Circuits and Systems II. He received the U.C. Berkeley Seven Rosen Funds award for innovation in 2003, was co-recipient of the 2002 ISSCC Jack Raper Award for an Outstanding Technology Directions Paper, received the National Science Foundation CAREER award in 2009, and was awarded the University of Washington College of Engineering Junior Faculty Innovator Award in 2011.View more
