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相关概念视频

MOSFET Amplifiers01:17

MOSFET Amplifiers

222
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...
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Oscillations In An LC Circuit01:30

Oscillations In An LC Circuit

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An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
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Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

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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.
964
Bipolar Junction Transistor01:22

Bipolar Junction Transistor

926
Bipolar Junction Transistors (BJTs) are essential elements in electronic circuits, playing a crucial role in the functionality of amplifiers, memories, and microprocessors. These transistors can be designed as NPN or PNP based on their doping patterns. They consist of three layers: the emitter, base, and collector. The configuration of these layers and their respective doping levels—with N-type or P-type impurities—define the transistor's type and its operational...
926
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...
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Cut-off Frequency of BJT01:17

Cut-off Frequency of BJT

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Cut-off frequencies in Bipolar Junction Transistors (BJTs) mark the transition between the signal's pass band and stop band, influencing their performance in amplifying or attenuating frequencies. These frequencies are crucial for designing BJTs to meet specific operational requirements in electronic circuits.
Alpha Cut-Off Frequency: Pertinent to the common-base configuration, the alpha cut-off frequency defines the upper-frequency limit at which the current gain, alpha, remains stable. As...
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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在芯片上的高功率超参数振荡器.

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    此摘要是机器生成的。

    研究人员通过控制共振器损失开发了高功率的芯片上光学超参数振荡器 (H-OPO). 这一突破为微型光源实现了创纪录的输出功率和可调节的波长.

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    科学领域:

    • 光子学和非线性光学学
    • 集成光学 集成光学 集成光学
    • 半导体设备 半导体设备

    背景情况:

    • 光学超参数振荡器 (H-OPO) 由于可调节的波长和宽带宽,是有价值的光源.
    • 在芯片上生成H-OPO是小型化,低功耗光学设备的关键.
    • 之前的H-OPO技术在高功率下实现高单频输出功率方面遇到了局限性.

    研究的目的:

    • 为了克服传统的芯片上H-OPO输出功率的局限性.
    • 开发一种高功率,小型化,波长可调节的光源.
    • 为了实现需要在传统放大器之外的芯片上光源生成的新应用.

    主要方法:

    • 使用化微环共振器,定期调整内在损耗.
    • 实现了优化合强度以抑制模式竞争.
    • 研究了损失调制对高功率H-OPO性能的影响.

    主要成果:

    • 实现了创纪录的芯片上信号功率215mW.
    • 达到0.75.5的峰值总转换效率达到0.75.
    • 已证明波长可调性约为5nm.

    结论:

    • 开发的方法有效地抑制了H-OPO在高功率的模式竞争.
    • 这项工作在芯片上,高功率光源技术中取得了重大进展.
    • 这些发现为具有扩展波长范围的新型光学设备铺平了道路.