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相关概念视频

Linear Approximation in Frequency Domain01:26

Linear Approximation in Frequency Domain

88
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
88
Upsampling01:22

Upsampling

215
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
215
Bandpass Sampling01:17

Bandpass Sampling

166
In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
166
Bulk Modulus01:21

Bulk Modulus

295
The bulk modulus is a scientific term used to describe a material's resistance to uniform compression. It is the proportionality constant that links a change in pressure to the resulting relative volume change.
295
Sampling Continuous Time Signal01:11

Sampling Continuous Time Signal

218
In signal processing, a continuous-time signal can be sampled using an impulse-train sampling technique, followed by the zero-order hold method. Impulse-train sampling involves the use of a periodic impulse train, which consists of a series of delta functions spaced at regular intervals determined by the sampling period. When a continuous-time signal is multiplied by this impulse train, it generates impulses with amplitudes corresponding to the signal's values at the sampling points.
In the...
218
Lossy Lines and Overvoltages01:22

Lossy Lines and Overvoltages

87
Transmission-line series resistance and shunt conductance cause three primary effects: attenuation, distortion, and power losses.
Attenuation
When constant series resistance and shunt conductance are present, voltage and current equations are modified. The propagation constant indicates that voltage and current waves consist of both forward and backward traveling components. These waves attenuate as they propagate, with the attenuation factor related to the resistance and conductance. In a...
87

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相关实验视频

Updated: Jun 13, 2025

Quasi-light Storage for Optical Data Packets
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调制增强的近级量子化,用于广泛输出带宽的输出带宽.

Jinshui Zhang1, Xiaoyang Tian1, Boshuo Wang1

  • 1Duke Univ., Durham, NC 27708-0187, USA.

IEEE transactions on power electronics
|September 16, 2024
PubMed
概括
此摘要是机器生成的。

对于多级转换器而言,一种新的混合调制技术实现了高输出质量和高达100%开关速率的带宽. 这种方法结合了基于载波和基本频率的切换,以最大限度地减少先进功率电子应用的扭曲.

关键词:
目前的扭曲情况.过器优化优化 过器优化模块化的多层转换器模块化技术是一种模块化技术.最接近的水平调制.脉冲宽度调制脉冲宽度调制

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相关实验视频

Last Updated: Jun 13, 2025

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Generation and Coherent Control of Pulsed Quantum Frequency Combs

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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科学领域:

  • 电力电子 电力电子 电力电子
  • 控制系统工程 控制系统工程
  • 电气工程 电气工程

背景情况:

  • 多级转换器提供了超越传统两级转换器的高级功能.
  • 高输出带宽和质量对于DC电网稳定和医疗器械刺激等应用至关重要.
  • 现有的调制方法,基于载波和基本频率切换,在高频率上有局限性或引入扭曲.

研究的目的:

  • 为多级转换器开发一种新的混合调制概念.
  • 为了实现高输出带宽 (高达100%的交换率) 具有高质量和低扭曲.
  • 克服现有的调制技术的局限性,以满足苛刻的应用.

主要方法:

  • 提出混合调制概念,将基于载波和基本频率切换相结合.
  • 实施过开关调制器来处理基本频率方法中的错误.
  • 优化过器以防止低调制并最大限度地减少宽带宽的扭曲.
  • 在一个级联桥转换器上实验验证该技术.

主要成果:

  • 混合调制实现了可用的输出带宽高达100%的开关速率.
  • 在整个操作带宽中,总波扭曲率保持在3%以下.
  • 实验结果表明,与现有方法相比,其性能优越.
  • 该技术成功地将高输出质量与高带宽能力相结合.

结论:

  • 拟议的混合调制是一种有效的解决方案,可以从多层转换器中实现高带宽,高质量的输出.
  • 这种技术在关键应用中显著提高了多层转换器的性能.
  • 优化过器设计是最小化扭曲和最大化带宽利用的关键.