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Article

Power Management Circuits for Low-Power RF Energy Harvesters

1
Department of Engineering and Architecture, University of Parma, I-43124 Parma, Italy
2
STMicroelectronics, I-20864 Agrate, Italy
*
Author to whom correspondence should be addressed.
J. Low Power Electron. Appl. 2020, 10(3), 29; https://0-doi-org.brum.beds.ac.uk/10.3390/jlpea10030029
Received: 13 August 2020 / Revised: 15 September 2020 / Accepted: 16 September 2020 / Published: 19 September 2020
(This article belongs to the Special Issue Low-Power RF Energy Harvesting for IoT Devices)
The paper describes the design and implementation of power management circuits for RF energy harvesters suitable for integration in wireless sensor nodes. In particular, we report the power management circuits used to provide the voltage supply of an integrated temperature sensor with analog-to-digital converter. A DC-DC boost converter is used to transfer efficiently the energy harvested from a generic radio-frequency rectifier into a charge reservoir, whereas a linear regulator scales the voltage supply to a suitable value for a sensing and conversion circuit. Implemented in a 65 nm CMOS technology, the power management system achieves a measured overall efficiency of 20%, with an available power of 4.5 μW at the DC-DC converter input. The system can sustain a temperature measurement rate of one sample/s with an RF input power of −28 dBm, making it compatible with the power levels available in generic outdoor environments. View Full-Text
Keywords: RF energy harvester; low-power; CMOS; DC-DC converters; low-dropout regulators RF energy harvester; low-power; CMOS; DC-DC converters; low-dropout regulators
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MDPI and ACS Style

Caselli, M.; Ronchi, M.; Boni, A. Power Management Circuits for Low-Power RF Energy Harvesters. J. Low Power Electron. Appl. 2020, 10, 29. https://0-doi-org.brum.beds.ac.uk/10.3390/jlpea10030029

AMA Style

Caselli M, Ronchi M, Boni A. Power Management Circuits for Low-Power RF Energy Harvesters. Journal of Low Power Electronics and Applications. 2020; 10(3):29. https://0-doi-org.brum.beds.ac.uk/10.3390/jlpea10030029

Chicago/Turabian Style

Caselli, Michele, Marco Ronchi, and Andrea Boni. 2020. "Power Management Circuits for Low-Power RF Energy Harvesters" Journal of Low Power Electronics and Applications 10, no. 3: 29. https://0-doi-org.brum.beds.ac.uk/10.3390/jlpea10030029

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