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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
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

773
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.
773
Impedance Combination01:21

Impedance Combination

434
Consider a string of christmas lights, each bulb symbolizing an impedance element. In this series configuration, the flow of electric current remains uniform across every component. This behavior aligns with Kirchhoff's Voltage Law (KVL), which asserts that the total impedance in such a setup equals the sum of individual impedances—akin to resistors in series. It follows that the voltage from the power source is distributed proportionally among these components, adhering to the...
434
Clipper Circuit01:18

Clipper Circuit

436
A clipper circuit is a fundamental wave-shaping device that harnesses the unique properties of diodes to alter and control waveform characteristics. This technology is widely used in electronic devices, especially in television and radar communication systems, where it enhances waveform modulation in both transmitters and receivers.
The operation of a clipper circuit can be exemplified by analyzing a dual-clipper configuration setup that integrates two ideal diodes, each paired with a biasing...
436
Cascaded Op Amps01:16

Cascaded Op Amps

630
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
630
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

4.7K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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基于微型的双极化射频频道化器

Weiwei Han, Zhihui Liu, Yifu Xu

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    概括
    此摘要是机器生成的。

    我们使用微和微环共振器开发了一种双极化射频 (RF) 通道器. 这项技术使RF即时带宽翻了一番,用于数字兼容信号检测.

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    相关实验视频

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    Generation and Coherent Control of Pulsed Quantum Frequency Combs

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    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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    科学领域:

    • 光子学是指光子学的使用方法.
    • 光学工程是指光学工程.
    • 无线电频率技术的技术

    背景情况:

    • 微为光学信号生成提供了一个多功能平台.
    • 无线电频率 (RF) 道化对于现代信号处理至关重要.
    • 集成的光子设备可以实现小型化和增强性能.

    研究的目的:

    • 报告一款基于微的新型双极化射频通道器.
    • 用维尼尔效应来证明增强的射频光谱切片.
    • 为了实现紧的,高性能的光子射频接收器.

    主要方法:

    • 使用两个高Q微环共振器 (MRRs) 与量身定制的自由光谱范围 (FSRs).
    • 采用一个活跃的MRR用于单晶微生成和一个被动的MRR用于双极化光谱过.
    • 在宽带射频频谱道化中利用维尼尔效应.

    主要成果:

    • 通过使用20条微组线与~49GHz的FSR实现了20个频道每极化.
    • 已证明高射频频谱切片分辨率为144 MHz (TE) 和163 MHz (TM).
    • 获得的瞬间射频操作带宽为3.1 GHz (TE) 和2.2 GHz (TM).

    结论:

    • 双极化微通道器使光谱段数量增加了一倍.
    • 这种方法促进了复杂性和尺寸降低的单立体集成光子射频接收器.
    • 该技术为需要数字兼容信号检测的广泛射频应用提供了前所未有的性能.