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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A Modular 32-site wireless neural stimulation microsystem
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A Modular 32-site wireless neural stimulation microsystem

机译:模块化的32位无线神经刺激微系统

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This paper presents Interestim-2B, a modular 32-site wireless microstimulating ASIC for neural prosthesis applications, to alleviate disorders such as blindness, deafness, and severe epilepsy. Implanted just below the skull along with a high-density intracortical microelectrode array, the chip enables leadless operation of the resulting microsystem, accepting power and data through an inductive link from the outside world and inserting information into the nervous system in the form of stimulating currents. Each module contains eight current drivers, generating stimulus currents up to ±270 ΜA with 5-b resolution, ∼100MΩ output impedance, and a dynamic range (headroom voltage) that extends within 150 mV of the 5 V supply rail, and 250 mV of the ground level. As many as 64 modules can be used in parallel, to drive multiprobe arrays of up to 2048 sites, with only a pair of connections to a common inductive-capacitive (LC) tank circuit, while receiving power (8.25 mW/module) and data (2.5 Mb/s) from a 5/10-MHz frequency shift keyed carrier. Every 4.6 mm × 4.6 mm chip fabricated in a 1.5-Μm, 2M/2P standard CMOS process through MOSIS, houses two modules and generates up to 65 800 stimulus pulses/s.
机译:本文介绍了Interestim-2B,这是一种用于神经假体的模块化32位无线微刺激ASIC,用于缓解失明,耳聋和严重癫痫等疾病。该芯片与高密度皮层内微电极阵列一起植入头骨下方,可实现所得微系统的无引线操作,通过来自外界的感应性连接来接受功率和数据,并以刺激电流的形式将信息插入神经系统。每个模块包含八个电流驱动器,以5b的分辨率产生高达±270ΜA的激励电流,输出阻抗约为100MΩ,动态范围(裕量电压)在5 V电源轨的150 mV和250 mV的电源范围内扩展。地面。最多可并行使用64个模块,以驱动多达2048个站点的多探针阵列,仅需一对连接到一个普通的电感电容(LC)储能电路,即可接收功率(8.25 mW /模块)和数据(5 Mb / s)的5 / 10-MHz频移键控载波。通过MOSIS以1.5微米,2M / 2P标准CMOS工艺制造的每个4.6毫米×4.6毫米芯片,都装有两个模块,并产生高达65800个刺激脉冲/秒。

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