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相关概念视频

Bandpass Sampling01:17

Bandpass Sampling

206
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....
206
Passive Filters01:27

Passive Filters

562
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
562
Active Filters01:25

Active Filters

857
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
857
Upsampling01:22

Upsampling

264
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...
264
Time and frequency -Domain Interpretation of PI Control01:27

Time and frequency -Domain Interpretation of PI Control

160
Proportional-Integral (PI) controllers are essential in many control systems to improve stability and performance. They are commonly used in everyday devices like thermostats to enhance system damping and reduce steady-state error. When the zero in the controller's transfer function is optimally placed, the system benefits significantly in terms of stability and accuracy.
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires...
160
Design Example01:23

Design Example

348
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
348

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相关实验视频

Updated: Jul 21, 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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通过使用像素结构和遗传算法优化实现带通波器.

Yangyang He1, Yi-Feng Cheng1, Jiang Luo1,2

  • 1School of Electronics and Information Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.

Micromachines
|July 29, 2023
PubMed
概括
此摘要是机器生成的。

设计带通波器 (BPF) 的新型灵活方法利用像素结构和遗传算法 (GA) 优化. 与传统方法相比,这种方法可以大大节省时间,并提高设计自由度.

关键词:
在EM模拟中使用EM模拟.带通波器 (BPF) 是一个带通波器.基因算法 (GA) 是一种基因算法.像素结构 像素结构宽带宽带是什么意思

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相关实验视频

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科学领域:

  • 电气工程 电气工程
  • 电磁学 电磁学 电磁学 电磁学
  • 过器的设计设计

背景情况:

  • 传统的带通波器 (BPF) 设计可能是复杂和耗时的.
  • 现有的方法可能缺乏灵活性来实现所需的波器特性.

研究的目的:

  • 为设计带宽波器 (BPF) 提供灵活和高效的方法.
  • 为了利用像素结构和遗传算法 (GA) 优化,提高设计能力.

主要方法:

  • 采用了一个由金属微条纹组成的像素结构.
  • 基因算法 (GA) 优化被用来确定断头互连.
  • 整合了金属孔,通过将网格连接到地面来增强设计自由.

主要成果:

  • 一个带通波器 (BPF) 成功设计,模拟和测量.
  • 实验结果显示,从1.1GHz到1.9GHz的回归损失带宽为10dB.
  • 插入损失被测量为大约2.5dB,在计算,模拟和测量方面有很好的一致性.

结论:

  • 拟议的基于GA的像素结构为BPF设计提供了灵活和方便的方法.
  • 这种方法显著减少了电磁 (EM) 模拟时间和劳动力.
  • 与传统技术相比,设计表明了可行性和效率.