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Automatic tuning of a resonant circuit in wireless power supply systems for biomedical sensors

Abstract

In this paper, a tuning method of a resonant circuit suited for wireless powering of miniature endoscopic capsules is presented and discussed. The method allows for an automatic tuning of the resonant frequency and matching impedance of a full wave rectifier loading the resonant circuit. Thereby, the receiver tunes so as to obtain the highest power efficiency under given conditions of transmission. A prototype receiver for wireless power reception, fabricated in in AMS CMOS 0.35 um technology, was used to verify correct operation of the proposed tuning. The prototype system produces a stable supply voltage, adjustable in the range of 1.2‒1.8 V at a maximum output current of 100‒67 mA, which is sufficient to power a typical endoscopic capsule.

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DOI:
Digital Object Identifier (open in new tab) 10.1515/bpasts-2016-0072
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Details

Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
Bulletin of the Polish Academy of Sciences-Technical Sciences no. 64, pages 641 - 646,
ISSN: 0239-7528
Language:
English
Publication year:
2016
Bibliographic description:
Blakiewicz G., Jakusz J., Jendernalik W., Szczepański S.: Automatic tuning of a resonant circuit in wireless power supply systems for biomedical sensors// Bulletin of the Polish Academy of Sciences-Technical Sciences. -Vol. 64, iss. 3 (2016), s.641-646
DOI:
Digital Object Identifier (open in new tab) 10.1515/bpasts-2016-0072
Verified by:
Gdańsk University of Technology

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