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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A 75-μW, 16-Channel Neural Spike-Sorting Processor With Unsupervised Clustering
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A 75-μW, 16-Channel Neural Spike-Sorting Processor With Unsupervised Clustering

机译:具有无监督群集功能的75μW,16通道神经峰值排序处理器

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摘要

Energy-efficient spike-sorting DSPs are necessary to allow for the real-time processing of multi-channel, wireless, implantable neural recordings. Online, unsupervised clustering forms an integral part of on-chip spike sorting. However, previous spike-sorting DSPs did not include unsupervised clustering due to the large memory required for its implementation. We demonstrate the first multi-channel spike-sorting DSP chip that includes online, unsupervised clustering. On-chip clustering has been made possible by using a two-stage implementation of an online clustering algorithm, a noise-tolerant distance metric, and selectively clocked high-V$_{rm T}$ register banks. The 16-channel spike-sorting chip, implemented in a 65-nm CMOS process, has a power dissipation of 75 µW at a supply voltage of 270 mV. The implementation of on-chip clustering provides a 240x reduction in the output data rate, which is 3x higher than the data-rate reduction obtained from previous spike-sorting DSP chips.
机译:<?Pub Dtl?>高效的峰值分类DSP是必需的,以便实时处理多通道,无线,可植入的神经记录。在线无监督群集是片上尖峰分类的组成部分。但是,由于其实现所需的大内存,以前的尖峰排序DSP不包括无监督的群集。我们演示了首个包含在线无监督群集的多通道尖峰排序DSP芯片。通过使用在线聚类算法的两阶段实现,耐噪声距离度量和选择性时钟控制的高V,使得片上聚类成为可能。 $ _ {rm T} $ 注册银行。采用65纳米CMOS工艺实现的16通道尖峰分类芯片,在270 mV的电源电压下具有75 µW的功耗。片上群集的实现可将输出数据速率降低240倍,这比从以前的尖峰排序DSP芯片获得的数据速率降低3倍高。

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