用于神经调控应用的集成片上电源管理单元(PMU)的半可移植无线电源传输(WPT)系统

IF 3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2023-03-27 DOI:10.1109/JERM.2023.3256705
Dipon K. Biswas;Nabanita Saha;Arnav Kaul;Ifana Mahbub
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引用次数: 0

摘要

神经调控系统的小型化对于无创或亚创光遗传学应用是重要的。这项工作提出了一种优化的无线功率传输(WPT)系统,该系统集成了片上整流电路和片外刺激电路,用于自由移动的啮齿动物的光遗传学刺激。所提出的WPT系统是使用印刷电路板(PCB)上的并联发射器(TX)线圈和基于线绕的接收器(RX)线圈构建的,然后是在180nm标准互补金属氧化物半导体(CMOS)工艺中设计的七级倍压器和低压差调节器(LDO)电路。脉冲刺激用于刺激神经元,该神经元是使用基于商用现货(COTS)组件的振荡器电路产生的。通过使用基于COTS的LED驱动电路来控制刺激的强度,该驱动电路控制通过$\mu$LED的电流。RX线圈的总尺寸为8 mm×3.4 mm。所提出的WPT系统的最大功率传输效率(PTE)为$35%,整流器的功率转换效率(PCE)为52%。所提出的具有可重构刺激频率的系统适用于刺激不同的大脑区域进行长期健康监测。
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Semi-Implantable Wireless Power Transfer (WPT) System Integrated With On-Chip Power Management Unit (PMU) for Neuromodulation Application
Miniaturization of the neuromodulation system is important for non-invasive or sub-invasive optogenetic application. This work presents an optimized wireless power transfer (WPT) system integrated with an on-chip rectification circuitry and an off-chip stimulation circuitry for optogenetic stimulation of freely moving rodents. The proposed WPT system is built using parallel transmitter (TX) coils on printed circuit board (PCB) and wire-wound based receiver (RX) coil followed by a seven-stage voltage doubler and a low dropout regulator (LDO) circuit designed in 180 nm standard Complementary Metal Oxide Semiconductor (CMOS) process. A pulse stimulation is used to stimulate the neurons which is generated using a commercially available off-the-shelf (COTS) components based oscillator circuit. The intensity of the stimulation is controlled by using a COTS based LED driver circuit which controls the current through the $\mu$ LED. The total dimension of the RX coil is 8 mm × 3.4 mm. The maximum power transfer efficiency (PTE) of the proposed WPT system is $\sim$ 35% and the power conversion efficiency (PCE) of the rectifier is 52%. The proposed system with reconfigurable stimulation frequency is suitable for exciting different brain areas for long-term health monitoring.
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CiteScore
5.80
自引率
9.40%
发文量
58
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Front Cover Table of Contents IEEE Journal of Electromagnetics, RF, and Microwaves in Medicine and Biology About this Journal IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology Publication Information Front Cover
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