dc.contributor.authorZhu, Yao
dc.contributor.authorZheng, Yuanjin
dc.contributor.authorGao, Yuan
dc.contributor.authorMade, Darmayuda I.
dc.contributor.authorSun, Chengliang
dc.contributor.authorJe, Minkyu
dc.contributor.authorGu, Alex Yuandong
dc.identifier.citationZhu, Y., Zheng, Y., Gao, Y., Made, D. I., Sun, C., Je, M., et al. (2015). An Energy Autonomous 400 MHz Active Wireless SAW Temperature Sensor Powered by Vibration Energy Harvesting. IEEE Transactions on Circuits and Systems I: Regular Papers, 62(4), 976-985.en_US
dc.description.abstractAn energy autonomous active wireless surface acoustic wave (SAW) temperature sensor system is presented in this paper. The proposed system adopts direct temperature to frequency conversion using a lithium niobate SAW resonator for both temperature sensing and high-Q resonator core in a cross-coupled RF oscillator. This arrangement simplifies the temperature sensor readout circuit design and reduces the overall system power consumption. A power conditioning circuit based on buck-boost converter is utilized to provide high efficiency power extraction from piezoelectric energy harvester (PEH) and dynamic system power control. The SAW resonator is fabricated in-house using a two-step lithography procedure while the RF oscillator as well as the PEH power conditioning circuit are implemented in standard 65-nm and 0.18- μm CMOS processes respectively. The measured RF transmitter output power is -15 dBm with a phase noise of -99.4 dBc/Hz at 1 kHz offset, achieving a figure of merit (FOM) of -217.6 dB. The measured temperature sensing accuracy is ±0.6 °C in -40 °C to 120 °C range. Fully powered by a vibration PEH, the proposed energy autonomous system has a self-startup voltage of 0.7 V and consumes an average power of 61.5 μW.en_US
dc.description.sponsorshipASTAR (Agency for Sci., Tech. and Research, S’pore)
dc.format.extent10 p.en_US
dc.relation.ispartofseriesIEEE Transactions on Circuits and Systems I: Regular Papersen_US
dc.rights© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: [http://dx.doi.org/10.1109/TCSI.2015.2402937].en_US
dc.subjectEnergy autonomousen_US
dc.subjectLow poweren_US
dc.subjectPower managementen_US
dc.subjectSAW oscillatoren_US
dc.subjectTemperature sensoren_US
dc.subjectVibration energy harvesten_US
dc.titleAn Energy Autonomous 400 MHz Active Wireless SAW Temperature Sensor Powered by Vibration Energy Harvestingen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.description.versionAccepted versionen_US

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