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...

Full description

Saved in:
Bibliographic Details
Published in:Bulletin of the Polish Academy of Sciences. Technical sciences 2016-09, Vol.64 (3), p.641-646
Main Authors: Blakiewicz, G., Jakusz, J., Jendernalik, W., Szczepański, S.
Format: Article
Language:English
Subjects:
automatic tuning
CMOS circuits
impedance matching
resonant circuit
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2300-1917
0239-7528
2300-1917
DOI:10.1515/bpasts-2016-0072