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相关概念视频

Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

815
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.
815
Properties of Fourier Transform II01:24

Properties of Fourier Transform II

243
The Fourier Transform (FT) is an essential mathematical tool in signal processing, transforming a time-domain signal into its frequency-domain representation. This transformation elucidates the relationship between time and frequency domains through several properties, each revealing unique aspects of signal behavior.
The Frequency Shifting property of Fourier Transforms highlights that a shift in the frequency domain corresponds to a phase shift in the time domain. Mathematically, if x(t) has...
243
MOSFET Amplifiers01:17

MOSFET Amplifiers

185
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...
185
¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

1.1K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.1K
IR Frequency Region: X–H Stretching01:24

IR Frequency Region: X–H Stretching

1.0K
In IR spectroscopy, signals produced by the X−H bonds (such as C−H, O−H, or N−H) can be observed in the frequency range of  2700–4000 cm–1. The C−H stretching vibration forms sharp bands in the region 2850–3000 cm–1. The presence of the O−H stretching vibration leads to the forming of an absorption band in the frequency range 3650–3200 cm−1. At the same time, N−H stretching can be confirmed by absorption bands in...
1.0K
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

101
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
101

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相关实验视频

Updated: Jul 16, 2025

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

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在芯片上的多束变频器通过侧带分离通过侧带分离.

Emiel Dieussaert, Roel Baets, Yanlu Li

    Optics express
    |September 15, 2023
    PubMed
    概括

    本研究介绍了一种新的光子集成电路组件,该组件使用一系列调制器创建多个光束,具有多种频率转移. 这种创新非常适用于先进的系统,如多束激光多普勒振动计.

    科学领域:

    • 光子学是指光子学的使用方法.
    • 集成光学 集成光学 集成光学
    • 光学工程是指光学工程.

    背景情况:

    • 光子集成电路 (PIC) 对于先进的光学系统至关重要.
    • 光学频率转移是许多光子应用中的关键功能.
    • 现有的多束频率转移方法可能是复杂的或有限的.

    研究的目的:

    • 为PIC引入一种新的多束光学变频组件.
    • 为了使多个光束的生成具有不同的频率转移.
    • 为诸如多束激光多普勒振动计 (LDV) 等应用提供多功能组件.

    主要方法:

    • 使用一组与自由传播区域 (FPR) 集成的并行光学调制器.
    • 在调制器阵列中采用周期波式调制.
    • 通过调制器之间的受控延迟,将离散的和声内容引导到不同的输出.

    主要成果:

    • 模拟了一个具有16个元素调制器阵列和5个输出的设计.
    • 该组件成功生成并收集了不同输出的5个不同的波 (-2, -1, 0, +1, +2).
    • 每个输出的侧带压缩比达到20dB至30dB之间.

    更多相关视频

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    结论:

    • 拟议的组件为PIC中的多束光学频率转移提供了一种新且有效的方法.
    • 该设计在波生成和光谱纯度方面表现出高性能.
    • 该组件的架构可适应在特定应用环境中进行优化.