Résumé
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.
| Langue d'origine | English |
|---|---|
| Numéro d'article | 030028 |
| Journal | Proceedings of Meetings on Acoustics |
| Volume | 19 |
| DOI | |
| Statut de publication | Published - 2013 |
| Événement | 21st International Congress on Acoustics, ICA 2013 - 165th Meeting of the Acoustical Society of America - Montreal, QC, Canada Durée: juin 2 2013 → juin 7 2013 |
ASJC Scopus Subject Areas
- Acoustics and Ultrasonics
ODD de l’ONU
Cette action contribue à la réalisation des objectifs de développement durable suivants
