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Cavalheiro, D., F. Moll, and S. Valtchev, "Novel {UHF} Passive Rectifier with Tunnel {FET} Devices", 2015 {IEEE} Computer Society Annual Symposium on {VLSI}: Institute of Electrical {&} Electronics Engineers ({IEEE}), jul, 2015. Abstract
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Cavalheiro, D., F. Moll, and S. Valtchev, "Insights into Tunnel FET-Based Charge Pumps and Rectifiers for Energy Harvesting Applications", IEEE Transactions on Very Large Scale Integration (VLSI) Systems, vol. 25, no. 3, pp. 988-997, 2017. Abstract
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Cavalheiro, D., F. Moll, and S. Valtchev, Ultra-Low Input Power Conversion Circuits based on Tunnel-FETs, : River Publishers, 2018. Abstract
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Cavalheiro, D., A. C. Silva, S. Valtchev, J. P. Teixeira, and V. Vassilenko, "Energy harvested from respiratory effort", BIODEVICES 2012 - Proceedings of the International Conference on Biomedical Electronics and Devices, pp. 388-392, 2012. Abstract
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Cavalheiro, D., F. Moll, and S. Valtchev, "Tunnel {FET} device characteristics for {RF} energy harvesting passive rectifiers", 2015 {IEEE} 13th International New Circuits and Systems Conference ({NEWCAS}): Institute of Electrical {&} Electronics Engineers ({IEEE}), jun, 2015. Abstract
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Cavalheiro, D., F. Moll, and S. Valtchev, "A battery-less, self-sustaining RF energy harvesting circuit with TFETs for ?w power applications", 14th IEEE International NEWCAS Conference, NEWCAS 2016, 2016. Abstract
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Cavalheiro, D., F. Moll, and S. Valtchev, "Ultra-Low input power conversion circuits based on TFETs", Ultra-Low Input Power Conversion Circuits based on TFETs, pp. 1-171, 2018. Abstract
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Cavalheiro, D., A. C. Silva, S. Valtchev, J. P. Teixeira, and V. Vassilenko, "Energy harvested from respiratory effort", BIODEVICES 2012 - Proceedings of the International Conference on Biomedical Electronics and Devices, pp. 388-392, 2012. Abstract
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Cavalheiro, D., F. Moll, and S. Valtchev, "Pespectives of {TFET} devices in ultra-low power charge pumps for thermo-electric energy sources", 2015 {IEEE} International Symposium on Circuits and Systems ({ISCAS}): Institute of Electrical {&} Electronics Engineers ({IEEE}), may, 2015. Abstract
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Cavalheiro, D., F. Moll, and S. Valtchev, "A comparison of TFET rectifiers for RF energy harvesting applications", Proceedings - 2016 IEEE International Power Electronics and Motion Control Conference, PEMC 2016, pp. 14-19, 2016. Abstract
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Cavalheiro, D., F. Moll, and S. Valtchev, "TFET-Based Power Management Circuit for RF Energy Harvesting", IEEE Journal of the Electron Devices Society, vol. 5, no. 1: Institute of Electrical and Electronics Engineers, pp. 7–17, 1, 2017. Abstract

This paper proposes a Tunnel FET (TFET)-based power management circuit (PMC) for ultra-low power RF energy harvesting applications. In contrast with conventional thermionic devices, the band-to-band tunneling mechanism of TFETs allows a better switching performance at sub-0.2 V operation. As a result, improved efficiencies in RF-powered circuits are achieved, thanks to increased rectification performance at low power levels and to the reduced energy required for a proper PMC operation. It is shown by simulations that heterojunction TFET devices designed with III-V materials can improve the rectification process at received power levels below-20 dBm (915 MHz) when compared to the application of homojunction III-V TFETs and Si FinFETs. For an available power of-25 dBm, the proposed converter is able to deliver 1.1 $μ }\text{W}$ of average power (with 0.5 V) to the output load with a boost efficiency of 86{%}.

Cavalheiro, D. N., F. Moll, and S. Valtchev, "Prospects of Tunnel {FETs} in the Design of Power Management Circuits for Weak Energy Harvesting {DC} Sources", {IEEE} Journal of the Electron Devices Society, vol. 6: Institute of Electrical and Electronics Engineers ({IEEE}), pp. 382–391, 2018. Abstracthttps://scholar.google.com/citations?user=5-Rq1wYAAAAJ&hl=en
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Coito, F., A. Eleutério, S. Valtchev, and F. Coito, "Tracking a Mobile Robot Position Using Vision and Inertial Sensor", Technological Innovation for Collective Awareness Systems: Springer Science $\mathplus$ Business Media, pp. 201–208, 2014. Abstract
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