HermesE: A 96-Channel Full Data Rate Direct Neural Interface in 0.13 μm CMOS
HermesE: A 96-Channel Full Data Rate Direct Neural Interface in 0.13 μm CMOS
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DOI：
10.1109/jssc.2012.2185338
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发表时间：
2012-04-01
影响因子：
5.4
通讯作者：
Meng, Teresa H.
中科院分区：
文献类型：
--
作者：
Gao, Hua;Walker, Ross M.;Meng, Teresa H.
功率和面积高效的传感器接口从1.2V消耗6.4 mW，同时在0.13微米CMOS中占用5 mm x 5 mm。作为头戴式无线记录系统的一部分，该接口提供对从皮质微电极获取的96个通道的宽带神经数据的同时访问，从而支持基础神经科学以及神经假体研究。信号在转换为31.25 kSa/S之前，通过具有60.3 dBSNDR和42 fJ/cv步长的10位合成孔径雷达模数转换器，在10 kHz带宽内获得2.2微伏均方根输入参考噪声。开关电容滤波提供控制良好的频率响应，并利用加窗积分器采样来减少噪声混叠，提高噪声/功率效率。
A power and area efficient sensor interface consumes 6.4 mW from 1.2 V while occupying 5 mm x 5 mm in 0.13 mu m CMOS. The interface offers simultaneous access to 96 channels of broadband neural data acquired from cortical microelectrodes as part of a head-mounted wireless recording system, enabling basic neuroscience as well as neuroprosthetics research. Signals are conditioned with a front-end achieving 2.2 mu V-rms input-referred noise in a 10 kHz bandwidth before conversion at 31.25 kSa/s by 10-bit SAR ADCs with 60.3 dB SNDR and 42 fJ/conv-step. Switched-capacitor filtering provides a well-controlled frequency response and utilizes windowed integrator sampling to mitigate noise aliasing, enhancing noise/power efficiency.