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A 32-Site 4-Channel High-Density Electrode Array for a Cochlear Prosthesis
一种用于人工耳蜗的32位点4通道高密度电极阵列，具有高刺激密度和低功耗特性。
500μA双相电流刺激，8位分辨率，<1%电荷失配，4μs最小脉冲宽度，2.5mW/通道功耗
人工耳蜗高密度电极阵列MEMS技术电流刺激阻抗测量
▸采用MEMS技术实现高密度电极阵列
▸集成主动电路实现高精度电流刺激
▸具备位点阻抗测量和位置感知功能
Abstract
This paper describes a 32-site 4-channel high-den-
sity 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
A biphasic current levels with 8-bit
resolution and less than 1% charge mismatch. The minimum
pulsewidth is 4
s, and the per-channel power dissipation is
2.5 mW from
2.5 V. The active circuit chip has a footprint of
2.4 mm
2.9 mm. Ser