Class E RF amplifier design in an ultrasonic link for wireless power delivery to implanted medical devices

Author

Vihvelin, Hugo ; Leadbetter, Jeff ; Bance, Manohar ; Brown, Jeremy A. ; Adamson, Robert B. A.

Author_Institution

Sch. of Biomed. Eng., Dalhousie Univ., Halifax, NS, Canada

fYear

2015

fDate

3-6 May 2015

Firstpage

382

Lastpage

386

Abstract

Ultrasonic power transfer is a promising alternative to electromagnetic induction for providing wireless power to active implanted medical devices. In a portable ultrasonic power link for devices like cochlear implants, there is a key requirement for an inverter circuit that is capable of driving the transmitting piezoelectric transducer with high efficiency in order to maximize battery life and overall device reliability. In the following paper, a high efficiency Class E amplifier is presented for use on the transmit side of an ultrasonic transcutaneous energy transfer (UTET) link. The amplifier is characterized by a peak efficiency of 90.8% at an output power level of 293 mW and drive frequency of 1.275 MHz.

Keywords

biomedical equipment; invertors; piezoelectric transducers; power supplies to apparatus; radiofrequency amplifiers; ultrasonic transducers; UTET link; class E RF amplifier design; electromagnetic induction; implanted medical device; inverter circuit; piezoelectric transducer; ultrasonic power link; ultrasonic power transfer; ultrasonic transcutaneous energy transfer link; wireless power delivery; Acoustics; Inverters; Logic gates; Power amplifiers; Power generation; Resonant frequency; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering (CCECE), 2015 IEEE 28th Canadian Conference on

Conference_Location

Halifax, NS

ISSN

0840-7789

Print_ISBN

978-1-4799-5827-6

Type

conf

DOI

10.1109/CCECE.2015.7129307

Filename

7129307