SHERP

Design for a Simplified Cochlear Implant System

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Authors
An, Soon Kwan; Park, Se-Ik; Jun, Sang Beom; Lee, Choong Jae; Byun, Kyung Min; Sung, Jung Hyun; Oh, Seung Ha; Wilson, Blake S.; Rebscher, Stephen J.; Kim, Sung June
Issue Date
2007-06
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
IEEE Trans. Biomed. Eng., vol. 54, pp. 973-982, June 2007
Keywords
Auditory prosthesiscochlear implant systemcontinuous interleaved samplingelectrode arrayhermetic packageneural prosthesisneural stimulation
Abstract
A simplified cochlear implant (CI) system would be
appropriate for widespread use in developing countries. Here, we
describe a CI that we have designed to realize such a concept. The
system implements 8 channels of processing and stimulation using
the continuous interleaved sampling (CIS) strategy. A generic digital
signal processing (DSP) chip is used for the processing, and
the filtering functions are performed with a fast Fourier transform
(FFT) of a microphone or other input. Data derived from the processing
are transmitted through an inductive link using pulse width
modulation (PWM) encoding and amplitude shift keying (ASK)
modulation. The same link is used in the reverse direction for backward
telemetry of electrode and system information. A custom receiver-
stimulator chip has been developed that demodulates incoming
data using pulse counting and produces charge balanced
biphasic pulses at 1000 pulses/s/electrode. This chip is encased in
a titanium package that is hermetically sealed using a simple but
effective method. A low cost metal-silicon hybrid mold has been
developed for fabricating an intracochlear electrode array with 16
ball-shaped stimulating contacts.
ISSN
0018-9294
Language
English
URI
http://hdl.handle.net/10371/7929
DOI
https://doi.org/10.1109/TBME.2007.895372
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
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