Fig. 1.
System design
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| Citation: |
Demeng Liu, Niansong Mei, Zhaofeng Zhang. An ultralow power wireless intraocular pressure monitoring system[J]. Journal of Semiconductors, 2014, 35(10): 105014. doi: 10.1088/1674-4926/35/10/105014
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D M Liu, N S Mei, Z F Zhang. An ultralow power wireless intraocular pressure monitoring system[J]. J. Semicond., 2014, 35(10): 105014. doi: 10.1088/1674-4926/35/10/105014.
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An ultralow power wireless intraocular pressure monitoring system
DOI: 10.1088/1674-4926/35/10/105014
More Information
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Abstract
This paper describes an ultralow power wireless intraocular pressure (IOP) monitoring system that is dedicated to sensing and transferring intraocular pressure of glaucoma patients. Our system is comprised of a capacitive pressure sensor, an application-specific integrated circuit, which is designed on the SMIC 180 nm process, and a dipole antenna. The system is wirelessly powered and demonstrates a power consumption of 7.56 μW at 1.24 V during continuous monitoring, a significant reduction in active power dissipation compared to existing work. The input RF sensitivity is -13 dBm. A significant reduction in input RF sensitivity results from the reduction of mismatch time of the ASK modulation caused by FM0 encoding. The system exhibits an average error of ±1.5 mmHg in measured pressure. Finally, a complete IOP system is demonstrated in the real biological environment, showing a successful reading of the pressure of an eye.-
Keywords:
- IOP,
- implanted medical,
- pressure measurement,
- RF powering,
- ultralow power ASIC
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References
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