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    科学领域:

    • 生物医学工程 生物医学工程
    • 微电子系统 微电子系统
    • 神经科学 技术 技术 神经科学

    背景情况:

    • 神经记录系统通常需要连接的电源,这限制了移动性并增加了感染风险.
    • 现有的无线微系统在不同的环境条件下面临电源管理和信号完整性的挑战.

    研究的目的:

    • 开发一个由集成光伏连接器供电的无神经记录微系统.
    • 设计一个能适应功率的系统,优化带宽并保持信号稳定性.
    • 在基于CMOS的光电子系统中研究和建模光诱导效应.

    主要方法:

    • 利用前置偏向的CMOS批量来创建用于发电的光伏连接点.
    • 实施了调节电力分配的功率适应式放大器设计.
    • 使用脉冲位置调制 (PPM) 通过AlGaAs微尺度发光二极管 (μLED) 进行光学数据传输.
    • 开发了一种模拟方法来分析光感应效应.

    主要成果:

    • 实现了一个测量43μm × 269μm的无神经记录显微系统 (FB-MOTE).
    • 经过证明的低功耗 (0.2μA在0.317V) 和耐受高光强度 (高达1200μW/mm2) 的操作.
    • 展示了功率适应性,增加功率可以提高系统带宽,同时保持噪音水平.
    • 验证了μLED驱动器在最大化排放与面积比的有效性.

    结论:

    • 前进批量CMOS微系统为自动供电,无线神经记录提供了可行的解决方案.
    • 适应功率的设计确保了在不同的光线条件下稳定的性能.
    • 开发的模拟方法有助于理解和减轻光电子系统中的光诱导效应.