Wireless Multichannel Neural Recording With a 128-Mbps UWB Transmitter for an Implantable Brain-Machine Interfaces
Wireless Multichannel Neural Recording With a 128-Mbps UWB Transmitter for an Implantable Brain-Machine Interfaces
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DOI：
10.1109/tbcas.2016.2514522
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发表时间：
2016-12-01
影响因子：
5.1
通讯作者：
Suzuki, T.
中科院分区：
文献类型：
--
作者：
Ando, H.;Takizawa, K.;Suzuki, T.
在长期和生物安全条件下，大规模同时记录神经活动可以提供必要的数据。这些数据可以用于推进临床应用中的脑机接口技术，并了解脑功能。为此，我们提出了一种新的多通道神经记录系统，该系统可以通过定制的专用集成电路（asic）的多个连接记录多达4096通道（ch）的皮质电图数据。ASIC包括64-ch低噪声放大器、模拟时分多路复用器和12位连续逼近寄存器adc。以1ks /s的速率采样的记录数据通过集成多路复用板进行时分复用，生成4096ch的51.2 Mbps的原始数据。该系统具有一个超宽带（UWB）无线单元，用于传输所记录的神经信号。设计了asic、多路复用板和UWB发射单元，目的是植入它们。通过与人体等效的液体幻影的初步实验，我们证实了4096-ch UWB无线数据传输速度为128 Mbps，距离小于20 mm。
Simultaneous recordings of neural activity at large scale, in the long term and under bio-safety conditions, can provide essential data. These data can be used to advance the technology for brain-machine interfaces in clinical applications, and to understand brain function. For this purpose, we present a new multichannel neural recording system that can record up to 4096-channel (ch) electrocorticogram data by multiple connections of customized application-specific integrated circuits (ASICs). The ASIC includes 64-ch low-noise amplifiers, analog time-division multiplexers, and 12-bit successive approximation register ADCs. Recorded data sampled at a rate of 1 kS/s are multiplexed with time division via an integrated multiplex board, and in total 51.2 Mbps of raw data for 4096 ch are generated. This system has an ultra-wideband (UWB) wireless unit for transmitting the recorded neural signals. The ASICs, multiplex boards, and UWB transmitter unit are designed with the aim of implanting them. From preliminary experiments with a human body-equivalent liquid phantom, we confirmed 4096-ch UWB wireless data transmission at 128 Mbps for distances below 20 mm.