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

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

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, th...

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Veröffentlicht in:Bulletin of the Polish Academy of Sciences. Technical sciences 2016-09, Vol.64 (3), p.641-646
Hauptverfasser: Blakiewicz, G., Jakusz, J., Jendernalik, W., Szczepański, S.
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Sprache:eng
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automatic tuning
CMOS circuits
impedance matching
resonant circuit
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container_title Bulletin of the Polish Academy of Sciences. Technical sciences
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creator Blakiewicz, G.
Jakusz, J.
Jendernalik, W.
Szczepański, S.
description 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 μm 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.
doi_str_mv 10.1515/bpasts-2016-0072
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subjects automatic tuning
CMOS circuits
impedance matching
resonant circuit
title Automatic tuning of a resonant circuit in wireless power supply systems for biomedical sensors
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