Method of readout of implanted hearing aid device and apparatus

Details Method of readout of implanted hearing aid device and apparatus Method of readout of implanted hearing aid device and apparatus

1988-09-01

1991-06-18

Shay, David

Surgery

Truss

Pad

128898, 128903, A61N 100

Patent

active

050242245

ABSTRACT:
The implanted device includes a rectifier circuit which is switched between modes of half wave and full wave rectification in response to the signal to be conveyed. The external device is inductively coupled to the implanted device through a pair of coils, one coil being embedded beneath the skin, forming the primary and secondary windings of a transformer. The external device delivers energy to the implanted device in amounts which vary in accordance with the rectification mode of the implanted device. By monitoring the energy delivered, the external device determines the rectification modes as they are switched and thereby ascertains the signal being conveyed from the implanted device.

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Pamphlet #SPA-1238, "An Introduction to the Cochlear Implant," Univ. of California, School of Medicine, Dept. of Otolaryngology, Coleman & Epstein Laboratories and Storz Instrument Company, 1984.

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