A 32-Site 4-Channel High-Density Electrode Array for a Cochlear Prosthesis

Author

Bhatti, Pamela T. ; Wise, Kensall D.

Author_Institution

Michigan Univ., Ann Arbor, MI

Volume

41

Issue

12

fYear

2006

Firstpage

2965

Lastpage

2973

Abstract

This paper describes a 32-site 4-channel high-density intracochlear electrode array. Combining MEMS-based processing technology with active circuitry, the thin-film device realizes a stimulating site density three times that of commercial systems, delivering 500 muA biphasic current levels with 8-bit resolution and less than 1% charge mismatch. The minimum pulsewidth is 4 mus, and the per-channel power dissipation is 2.5 mW from plusmn2.5 V. The active circuit chip has a footprint of 2.4mmtimes2.9 mm. Serving as the end-effector of a cochlear prosthesis, the active array also provides site-impedance measurement and position-sensing functions

Keywords

bioMEMS; ear; electrodes; prosthetics; 2.4 mm; 2.5 mW; 2.9 mm; 500 muA; MEMS-based processing technology; active circuitry; bioMEMS; cochlear implant; cochlear prosthesis; current stimulator; electrode impedance; high-density electrode array; neural prostheses; thin-film device; Active circuits; Electrodes; Position measurement; Power dissipation; Prosthetics; Pulse circuits; Semiconductor device measurement; Space vector pulse width modulation; Thin film circuits; Thin film devices; BioMEMS; cochlear implant; current stimulator; electrode impedance; neural prostheses;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2006.884862

Filename

4014600