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

Producción científica: Contribución a una revista › Artículo de la conferencia › revisión exhaustiva

Resumen

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.

Idioma original	English
Número de artículo	030028
Publicación	Proceedings of Meetings on Acoustics
Volumen	19
DOI	https://doi.org/10.1121/1.4800643
Estado	Published - 2013
Evento	21st International Congress on Acoustics, ICA 2013 - 165th Meeting of the Acoustical Society of America - Montreal, QC, Canada Duración: jun. 2 2013 → jun. 7 2013

ASJC Scopus Subject Areas

Acoustics and Ultrasonics

ODS de las Naciones Unidas

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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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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

Resumen

ASJC Scopus Subject Areas

ODS de las Naciones Unidas

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