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

Bulletin of the Polish Academy of Sciences. Technical Sciences

J. JakuszFaculty of Electronics, Telecommunications and Informatics, Gda?sk University of Technology, 11/12 Narutowicza St., 80-233 Gda?sk, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  W. JendernalikFaculty of Electronics, Telecommunications and Informatics, Gda?sk University of Technology, 11/12 Narutowicza St., 80-233 Gda?sk, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  S. Szczepa?skiFaculty of Electronics, Telecommunications and Informatics, Gda?sk University of Technology, 11/12 Narutowicza St., 80-233 Gda?sk, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  G. BlakiewiczCorresponding authorFaculty of Electronics, Telecommunications and Informatics, Gda?sk University of Technology, 11/12 Narutowicza St., 80-233 Gda?sk, PolandEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹ 

[1] Faculty of Electronics, Telecommunications and Informatics, Gda?sk University of Technology, 11/12 Narutowicza St., 80-233 Gda?sk, Poland

关键词: Keywords: CMOS circuits;    automatic tuning;    impedance matching;    resonant circuit;   

DOI  :  10.1515/bpasts-2016-0072

学科分类：工程和技术（综合）

来源: Polska Akademia Nauk * Centrum Upowszechniania Nauki / Polish Academy of Sciences, Center for the Advancement of Science

【 摘 要 】

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.

【 授权许可】

Unknown