A modulator and driver for a high-efficiency ultrasonic link providing power and signal to an implanted hearing aid

Hugo Vihvelin; Jeff Leadbetter; Jeremy A. Brown; Rob B. Adamson

doi:10.1121/1.4800643

A modulator and driver for a high-efficiency ultrasonic link providing power and signal to an implanted hearing aid

Hugo Vihvelin, Jeff Leadbetter, Jeremy A. Brown, Rob B. Adamson

Medicine

Medicine

Research output: Contribution to journal › Conference article › peer-review

Abstract

We present results from the design and testing of a high-efficiency amplitude modulation and demodulation circuit for use in an ultrasonic power link for implanted hearing aids. The modulator provides an 8 KHz modulation bandwidth around a carrier frequency of 1.024 MHz and achieves high efficiency from a switched driver design employing a 50 KHz ramp-compare pulse-width modulation scheme. It can deliver 27.2mW to an ultrasonic link with 76% efficiency. The design of an implanted demodulator circuit is also discussed. When coupled to a set of matched high-efficiency ultrasound transmitter/receiver transducers achieving a 45% transmission efficiency, this system holds promise as a compact, lightweight, highly directional means of providing power and signal to implanted devices.

Original language	English
Article number	030028
Journal	Proceedings of Meetings on Acoustics
Volume	19
DOIs	https://doi.org/10.1121/1.4800643
Publication status	Published - 2013
Event	21st International Congress on Acoustics, ICA 2013 - 165th Meeting of the Acoustical Society of America - Montreal, QC, Canada Duration: Jun 2 2013 → Jun 7 2013

ASJC Scopus Subject Areas

Acoustics and Ultrasonics

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1121/1.4800643

Cite this

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title = "A modulator and driver for a high-efficiency ultrasonic link providing power and signal to an implanted hearing aid",

abstract = "We present results from the design and testing of a high-efficiency amplitude modulation and demodulation circuit for use in an ultrasonic power link for implanted hearing aids. The modulator provides an 8 KHz modulation bandwidth around a carrier frequency of 1.024 MHz and achieves high efficiency from a switched driver design employing a 50 KHz ramp-compare pulse-width modulation scheme. It can deliver 27.2mW to an ultrasonic link with 76% efficiency. The design of an implanted demodulator circuit is also discussed. When coupled to a set of matched high-efficiency ultrasound transmitter/receiver transducers achieving a 45% transmission efficiency, this system holds promise as a compact, lightweight, highly directional means of providing power and signal to implanted devices.",

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AU - Vihvelin, Hugo

AU - Leadbetter, Jeff

AU - Brown, Jeremy A.

AU - Adamson, Rob B.

PY - 2013

Y1 - 2013

N2 - We present results from the design and testing of a high-efficiency amplitude modulation and demodulation circuit for use in an ultrasonic power link for implanted hearing aids. The modulator provides an 8 KHz modulation bandwidth around a carrier frequency of 1.024 MHz and achieves high efficiency from a switched driver design employing a 50 KHz ramp-compare pulse-width modulation scheme. It can deliver 27.2mW to an ultrasonic link with 76% efficiency. The design of an implanted demodulator circuit is also discussed. When coupled to a set of matched high-efficiency ultrasound transmitter/receiver transducers achieving a 45% transmission efficiency, this system holds promise as a compact, lightweight, highly directional means of providing power and signal to implanted devices.

AB - We present results from the design and testing of a high-efficiency amplitude modulation and demodulation circuit for use in an ultrasonic power link for implanted hearing aids. The modulator provides an 8 KHz modulation bandwidth around a carrier frequency of 1.024 MHz and achieves high efficiency from a switched driver design employing a 50 KHz ramp-compare pulse-width modulation scheme. It can deliver 27.2mW to an ultrasonic link with 76% efficiency. The design of an implanted demodulator circuit is also discussed. When coupled to a set of matched high-efficiency ultrasound transmitter/receiver transducers achieving a 45% transmission efficiency, this system holds promise as a compact, lightweight, highly directional means of providing power and signal to implanted devices.

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A modulator and driver for a high-efficiency ultrasonic link providing power and signal to an implanted hearing aid

Abstract

ASJC Scopus Subject Areas

UN SDGs

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