Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Design of a class‐E transcutaneous energy transmitter for an implantable system

Design of a class‐E transcutaneous energy transmitter for an implantable system Purpose – The purpose of this paper is to develop a model of the inductive link for implantable systems. The model is suitable for a cochlear implant in which a lateral misalignment and distance coil can be up to 16 mm. Design/methodology/approach – The description of the generation of implantable systems' high‐power, such as a cochlear implant, are powered by transcutaneous inductive power links formed by two coils: the first is a printed spiral coil used in the receiver device and the second is a solenoid coil used in the emitter device. Optimizing the power efficiency of the wireless link is imperative to minimize the size of the external energy source, heating dissipation in the tissue, and interference with other devices. The authors have outlined the theoretical foundation of optimal power transmission efficiency in an inductive link, and combined it with semi‐empirical models to predict parasitic components. The power amplifier itself is a class‐E amplifier optimized in both output voltage and efficiency, and bears an excellent tolerance to misalignments. Findings – Two Spice‐based electrical models of the coils are achieved. The technique employed during the work is based on polynomial interpolation of the mutual inductance in which coil misalignments are considered as variables. On the other hand, a voltage regulator is studied and simulated by Cadence Analog Artist in the AMS 0.35 μ m CMOS technology. Originality/value – This paper provides a novel and useful method for transmitting power for an implantable system via an inductive link. The procedure of the authors' design is achieved at 10 MHz and the power transmission efficiency is 35 percent, whatever the longitudinal misalignment (up to 16 mm) between both coils. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Microelectronics International Emerald Publishing

Design of a class‐E transcutaneous energy transmitter for an implantable system

Download PDF
13 pages

Loading next page...
 
/lp/emerald-publishing/design-of-a-class-e-transcutaneous-energy-transmitter-for-an-8cxYDFsUK9
Publisher
Emerald Publishing
Copyright
Copyright © 2012 Emerald Group Publishing Limited. All rights reserved.
ISSN
1356-5362
DOI
10.1108/13565361211219130
Publisher site
See Article on Publisher Site

Abstract

Purpose – The purpose of this paper is to develop a model of the inductive link for implantable systems. The model is suitable for a cochlear implant in which a lateral misalignment and distance coil can be up to 16 mm. Design/methodology/approach – The description of the generation of implantable systems' high‐power, such as a cochlear implant, are powered by transcutaneous inductive power links formed by two coils: the first is a printed spiral coil used in the receiver device and the second is a solenoid coil used in the emitter device. Optimizing the power efficiency of the wireless link is imperative to minimize the size of the external energy source, heating dissipation in the tissue, and interference with other devices. The authors have outlined the theoretical foundation of optimal power transmission efficiency in an inductive link, and combined it with semi‐empirical models to predict parasitic components. The power amplifier itself is a class‐E amplifier optimized in both output voltage and efficiency, and bears an excellent tolerance to misalignments. Findings – Two Spice‐based electrical models of the coils are achieved. The technique employed during the work is based on polynomial interpolation of the mutual inductance in which coil misalignments are considered as variables. On the other hand, a voltage regulator is studied and simulated by Cadence Analog Artist in the AMS 0.35 μ m CMOS technology. Originality/value – This paper provides a novel and useful method for transmitting power for an implantable system via an inductive link. The procedure of the authors' design is achieved at 10 MHz and the power transmission efficiency is 35 percent, whatever the longitudinal misalignment (up to 16 mm) between both coils.

Journal

Microelectronics International – Emerald Publishing

Published: Jan 20, 2012

Keywords: Microelectronics; Packaging; Power transmission systems; Integrated circuits; Amplifiers; Micro‐circuit technology

References

  • High‐efficiency coupling‐insensitive transcutaneous power and data transmission via an inductive link
    Clemens, M.Z.; Erwin, S.H.
  • Geometric approach for coupling enhancement of magnetically coupled coils
    Clemens, M.Z.; Erwin, S.H.
  • Electronic design of a cochlear implant for multichannel high‐rate pulsatile stimulation strategies
    Clemens, M.Z.; Desoyer, I.J.H.; Erwin, S.H.
  • Analysis of resonant coupled coils in the design of radio frequency transcutaneous links
    Donaldson, N.N.; Perkins, T.A.
  • Mutual inductance of air‐cored coils: effect on design of radio‐frequency coupled implants
    Flack, F.C.; James, E.D.; Schlapp, D.M.
  • Idealized operation of the class E tuned power amplifier
    Frederic, H.R.
  • Effects of circuit variations on the class E tuned power amplifier
    Frederic, H.R.
  • A wide‐band efficient inductive transdermal power and data link with coupling insensitive gain
    Galbraith, D.C.; Soma, M.; White, R.L.
  • Reducing load effects in high‐energy high‐efficiency inductive links
    Hamadi, G.; Mondher, C.; Mongi, L.; Richard, P.; Fayçal, S.
  • The gm/ID Methodology, a Sizing Tool for Low‐voltage Analog CMOS Circuits: The Semi‐Empirical and Compact Model Approaches
    Jespers, P.G.A.
  • Exact analysis of class E tuned power amplifier at any Q and switch duty cycle
    Kazimierczuk, M.K.; Puczko, K.
  • Fully integrated power‐supply design for wireless biomedical implants
    Maysam, G.; Khalil, N.
  • A modular 32‐site wireless neural stimulation microsystem
    Maysam, G.; Khalil, N.
  • A wideband frequency‐shift keying wireless link for inductively powered biomedical implants
    Maysam, G.; Khalil, N.
  • Fully integrated wideband high‐current rectifiers for inductively powered devices
    Maysam, G.; Khalil, N.
  • An integrated full‐wave CMOS rectifier with built‐in back telemetry for RFID and implantable biomedical applications
    Maysam, G.; Suresh, A.
  • Optimization of the output of energy transfer in the system implantables
    Mondher, C.; Hamadi, G.; Mongi, L.; Fayçal, S.
  • Résultats expérimentaux de la mutuelle inductance entre différentes bobines pour la transmission de l'énergie et de l'information – application système implantable
    Mondher, C.; Hamadi, G.; Mongi, L.; Fayçal, S.
  • An optimal geometry for power energy and data transmission in the inductive link
    Mondher, C.; Hamadi, G.; Mongi, L.; Fayçal, S.
  • Stability electrical modeling of inductive link for high energy transmission
    Mondher, C.; Hamadi, G.; Mongi, L.; Richard, P.; Mohamed, R.; Fayçal, S.
  • Class E – a new class of high‐efficiency tuned single‐ended switching power amplifiers
    Nathan, O.S.; Alan, D.S.
  • Inductive links and drivers for remotely‐powered telemetry systems
    Philip, R.T.; Edington, M.
  • Closed‐loop class E transcutaneous power and data link for microimplants
    Philip, R.T.; Martin, A.K.S.
  • Design and optimization of printed spiral coils for efficient transcutaneous inductive power transmission
    Uei, M.J.; Maysam, G.