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相关概念视频

Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

962
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
962
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

478
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
478
MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

470
Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity...
470

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基于像素化超级结构功率周期优化的上芯片模式多重传输通信.

Chaofeng Wang, Houwen Liu, Xue Long

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    概括
    此摘要是机器生成的。

    本研究介绍了模式复杂器的优化像素化超结构,提高了芯片上的光通信性能. 新方法减少了制造错误,提高了数据传输效率,降低了插入损失.

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    科学领域:

    • 光子学和光学通信技术
    • 纳米技术和元材料

    背景情况:

    • 在芯片上的光通信需要高容量解决方案,如模式复杂化.
    • 低波长的像素化超结构提供了紧模式的多重复合器,但由于制造偏差而受到影响.
    • 制造错误会降低光通信系统中模式复杂器的性能.

    研究的目的:

    • 为模式复合器开发一个像素化的超结构工作周期优化策略.
    • 为了减轻制造偏差对设备性能的影响.
    • 提高芯片内光通信的容量和效率.

    主要方法:

    • 提出了一种工作周期优化策略,通过消除低于功绩数字门的像素.
    • 减少了形空气孔的数量,在像素化的超结构.
    • 采用了轮盘方法来更新像素和随机突变,以避免局部最佳.

    主要成果:

    • 从20.6%提高到13.9%,实现了工作周期的改善.
    • 演示了一种三模复合器 (TE0,TE1,TE2),可以传输72 Gbit/s的QPSK-OFDM信号.
    • 与直接二进制搜索相比,减少了1.92.8dB的插入损失,并在1550nm时优化了1.5dB的通信灵敏度.

    结论:

    • 建议的优化策略有效地减少了制造偏差对模式复杂器的影响.
    • 这种方法可以提高性能指标,如插入损失和通信敏感性.
    • 这项工作为高容量的芯片上光学通信提供了一条新的技术道路.