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相关概念视频

LC Circuits01:21

LC Circuits

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An LC circuit consists of an inductor and a capacitor, either in series or parallel. Consider a charged capacitor connected with an inductor in series. Before the switch is closed, all the energy of the circuit is stored in the electric field of the capacitor. When the switch is closed, the capacitor begins to discharge, producing a current in the circuit. The current, in turn, creates a magnetic field in the inductor. Because of the induced emf in the inductor, the current cannot change...
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Semiconductors01:22

Semiconductors

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There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
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Schottky Barrier Diode01:27

Schottky Barrier Diode

349
Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
349
The Ideal Diode01:15

The Ideal Diode

820
A diode is a semiconductor device that allows current to flow in one direction only, making it a crucial component in electronic circuits for controlling the direction of current flow. An ideal diode is a simplified version of a real diode used to understand how diodes work in circuits. It possesses two terminals: the positive anode and the cathode, which is negative. When a positive voltage is applied to the anode relative to the cathode, the diode is in a forward-biased state, allowing...
820
Diode: Forward bias01:20

Diode: Forward bias

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In semiconductor devices, diodes play a crucial role in directing current flow, and its operation is primarily categorized into forward bias and reverse bias. A diode is said to be forward-biased when its p-type region is connected to the positive terminal of a battery and its n-type region is linked to the negative terminal. This configuration reduces the potential barrier within the diode, allowing current to flow easily from the p to the n-type region.
The behavior of a diode in forward bias...
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Diode: Reverse bias01:14

Diode: Reverse bias

726
A diode is reverse-biased when the positive terminal of an external voltage source is connected to the n-type material and the negative terminal to the p-type material. This configuration opposes the natural direction of current flow through the diode, effectively increasing the width of the depletion region and the barrier potential. The reverse bias condition produces a minimal leakage current, primarily due to minority charge carriers. This leakage becomes significant when the reverse...
726

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Object alignment in spatially multiplexed holograms applied to polarization sensing.

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在芯片上的可编程系统上的激光二极管驱动器.

Milena Micic, Petar Atanasijevic, Pedja Mihailovic

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    概括
    此摘要是机器生成的。

    芯片上的可编程系统提供了一种具有精确温度控制的多功能激光二极管 (LD) 驱动器. 该解决方案提供稳定的性能和超越保护,作为专用设备的替代品.

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    科学领域:

    • 电子 电子 电子 电子 电子 电子 电子
    • 光子学 是一个光子学.
    • 控制系统 控制系统

    背景情况:

    • 专用激光二极管 (LD) 驱动器往往缺乏灵活性和先进的控制功能.
    • 将控制和驱动器功能集成到单一芯片上,为小型化和降低成本提供了潜力.

    研究的目的:

    • 提出和演示一个全面的激光二极管驱动器与集成的温度控制,使用芯片上的可编程系统 (SoC).
    • 为传统的专用LD驱动器设备提供灵活和高性能的替代方案.

    主要方法:

    • 在SoC上实现了一个数字比例积分导数 (PID) 控制器,用于精确的LD温度调节.
    • 用外部光二极管和集成的传 impedance 放大器来测量光电流特征和频率响应.
    • 实现了带有软启动功能的激光二极管超速保护的数字实现.

    主要成果:

    • 经过证明的0.084%的温度稳定性和2kHz的带宽.
    • 实现了0.11%的全尺度电流误差.
    • 成功实现了数字超速保护,以提高设备的寿命.

    结论:

    • 提出的基于SoC的LD驱动器为激光二极管控制提供了稳定,准确和灵活的解决方案.
    • 该设计可适应各种激光二极管要求,包括已证明的3W红外LD.
    • 这种方法为专门的单一功能驱动器IC提供了可行的替代方案.