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相关概念视频

MOSFET Amplifiers01:17

MOSFET Amplifiers

156
The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
156

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相关实验视频

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基于带有光学注射的半导体激光器的光学ReLU类激活功能.

Guan-Ting Liu, Yi-Wei Shen, Rui-Qian Li

    Optics letters
    |February 15, 2024
    PubMed
    概括

    研究人员使用半导体激光器开发了一种光学修正线性单元类 (ReLU类) 激活功能. 这一突破使可重新配置的光学神经网络能够通过光学实现非线性激活函数来实现.

    科学领域:

    • 光电学是指光电子产品.
    • 光子学 是一个光子学.
    • 人工智能 硬件 硬件

    背景情况:

    • 人工神经网络 (ANN) 依赖于线性和非线性运算.
    • 光学神经网络 (ONN) 在线性操作方面表现出色,但在非线性激活函数方面扎.
    • 实施光学激活功能是推进ONN的一个关键挑战.

    研究的目的:

    • 介绍一种新的光学修正线性单位类型 (ReLU类型) 激活功能.
    • 为了证明半导体激光器中光学非线性激活函数的可行性.
    • 为了实现可重新配置的光学神经网络架构.

    主要方法:

    • 使用半导体激光器进行光学注射.
    • 在注射锁定图中,在Hopf分叉上方实现了180°旋转的RELU类功能.
    • 在连续波模式下运行系统.

    主要成果:

    • 演示了一个功能性的光学ReLU-like激活功能.
    • 通过调整激光频率差异来展示激活功能的斜率的重新配置.
    • 确认在Hopf双叉线上方的广泛模式下运行.

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    结论:

    • 开发的光学RELU类激活功能克服了光学神经网络设计中的一个主要障碍.
    • 这项工作为更强大,更高效的全光计算系统铺平了道路.
    • 可重新配置的光学激活功能可以通过半导体激光器实现.