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

• Autorzy: Blakiewicz G. , Jakusz J. , Jendernalik W. , Szczepański S.

Identyfikatory

DOI

10.1515/bpasts-2016-0072

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

CMOS circuits; automatic tuning; impedance matching; resonant circuit

PL

układy CMOS; tuning; impedancja; obwód rezonansowy

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2016
• Tom: Vol. 64, nr 3
• Strony: 641--646
• Opis fizyczny: Bibliogr. 13 poz., rys., wykr., tab.

Twórcy

autor

Blakiewicz G.

• Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, 11/12 Narutowicza St., 80-233 Gdańsk, Poland

autor

Jakusz J.

• Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, 11/12 Narutowicza St., 80-233 Gdańsk, Poland

autor

Jendernalik W.

• Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, 11/12 Narutowicza St., 80-233 Gdańsk, Poland

autor

Szczepański S.

• Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, 11/12 Narutowicza St., 80-233 Gdańsk, Poland

Bibliografia

• [1] O. Lazaro, G.A. Rincon-Mora, “180-nm CMOS wideband capacitor-free inductively coupled power receiver and charger”, IEEE J. Solid-State Circ., 48 (11), 2839–2849 (2011).
• [2] Ch. Hao, Y. Jia, X. Liu, R.-F. Xue, H.J. Lim, P.B. Khannur, K.L. Chan, A.A. Lee, K. Kang, L.S. Lim, C. He, P. Singh, P. Woo-Tae, J. Minkyu, “An inductively powered implantable blood flow sensor microsystem for vascular grafts”, IEEE Trans. Biomed. Eng., 58 (2), 2466–2475 (2011).
• [3] Ch.-J. Chen, T.-H. Chu, Ch.-L. Lin, Z.-Ch. Jou, “A study of loosely coupled coils for wireless power transfer”, IEEE Trans. Circ. Syst. II: Exp. Briefs, 57 (7), 536–540 (2010).
• [4] K. Fotopoulou, B. W. Flynn, “Wireless power transfer in loosely coupled links: coil misalignment model”, IEEE Trans. Magnetics, 47 (2), 416 – 430 (2011).
• [5] J. Lee Y.-S. Lim, W.-J. Yang, S.-O. Lim, “Wireless power transfer system adaptive to change in coil separation”, IEEE Trans. Antennas and Propagation, 62 (2), 889–897 (2014).
• [6] R.-F. Xue, K.-W. Cheng, M. Je, “High-efficiency wireless power transfer for biomedical implants by optimal resonant load transformation”, IEEE Trans. Circ. Syst. I: Reg. Papers, 60 (4), 867–874 (2013).
• [7] N.Y. Kim, K.Y. Kim, J. Choi, C.-W. Kim, “Adaptive frequency with power-level tracking system for efficient magnetic resonance wireless power transfer”, Electr. Letters, 48 (8), 452–454 (2012).
• [8] A.P. Sample, D.A. Meyer, J.R. Smith, “Analysis, experimental results, and range adaptation of magnetically coupled resonators for wireless power transfer”, IEEE Trans. Industrial Electronics, 58 (2), 544–554, (2011).
• [9] C. Sauer, M. Stanacevic, G. Cauwenberghs, N. Thakor, “Power harvesting and telemetry in CMOS for implanted devices”, IEEE Trans. Circ. Syst. I: Reg. Papers, 58 (12), 2605–2613 (2005).
• [10] G. Blakiewicz, “Bezprzewodowe zasilanie sensorów medycznych”, Przegląd Elektrotechniczny 9, 12–14, (2014).
• [11] W.H. Ko, S.P. Liang, C. Fung, „Design of radio-frequency powered coils for implant instruments”, Medical & Biological Engineering & Computing 15, 634–640, (1977).
• [12] G. Blakiewicz, “Technique to improve CMRR at high frequencies in CMOS OTA-C filters”, Bull. Pol. Ac.: Tech. 61 (3), 697–703 (2013).
• [13] W. Jendernalik, J. Jakusz, G. Blakiewicz, R. Piotrowski, S. Szczepański, “CMOS realisation of analogue processor for early vision processing”, Bull. Pol. Ac.: Tech. 59 (2), 141–147, (2011).