Title :
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
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;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2006.884862
