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相关概念视频

Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

837
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.
837
MOSFET Amplifiers01:17

MOSFET Amplifiers

186
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...
186
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

284
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
284
Cut-off Frequency of BJT01:17

Cut-off Frequency of BJT

768
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...
768
Bus Impedance Matrix01:24

Bus Impedance Matrix

149
Calculating subtransient fault currents for three-phase faults in an N-bus power system involves using the positive-sequence network. When a three-phase short circuit occurs at a specific bus, the analysis uses the superposition method to evaluate two separate circuits.
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
149
Biasing of FET01:22

Biasing of FET

322
Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
322

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相关实验视频

Updated: Jul 23, 2025

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

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一个紧的宽带常态抑制过器,将系列集成到缺陷的波纹参考平面结构中.

Chung-Ke Yu1, Ding-Bing Lin2, Hsin-Piao Lin1

  • 1Department of Electronic Engineering, National Taipei University of Technology, Taipei 10608, Taiwan.

Sensors (Basel, Switzerland)
|July 14, 2023
PubMed
概括

这项研究引入了高速公交车的新过器结构,大大降低了常态噪声. 新设计确保了信号完整性,并支持服务器和计算机中的高数据速率.

关键词:
常用模式的过器不同的信号差异信号.电磁干扰是一种电磁干扰.系列-类的.信号的完整性 信号的完整性宽带抑制抑制可以实现.

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Last Updated: Jul 23, 2025

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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
  • 信号的完整性 信号的完整性

背景情况:

  • 像SATA Express,HDMI 2.0,USB 3.2和PCI Express 5.0这样的高速数字接口对于现代服务器和计算机系统至关重要.
  • 常态 (CM) 噪声是这些高速公共汽车中影响信号完整性和电磁干扰 (EMI) 的重大挑战.
  • 现有的噪声抑制技术可能无法满足下一代数据速率的严格要求.

研究的目的:

  • 为高速公交车提出并验证一种新的常用模式噪声抑制过方案.
  • 在频率和时间领域评估过器的性能.
  • 为了证明过器在减少电磁干扰 (EMI) 和保持信号完整性的有效性.

主要方法:

  • 设计和制造一个使用新型系列-缺陷波纹基准平面 (SMDCRP) 结构的过器.
  • 全波电磁模拟用于性能预测.
  • 试验测量和验证过器的特性.
  • 眼睛图形分析用于时间域信号传输能力评估.

主要成果:

  • 在微分模式 (DM) 中,SMDCRP波器的插入损失低于-4.838 dB (DC 到 32 GHz),从而保持信号完整性.
  • 从8.81GHz到32.65GHz实现的普通模式 (CM) 抑制超过了-10dB.
  • 分数带宽增加到115%,CM噪声改善了55.2%.
  • 眼睛图的验证证实了32 Gb/s的完全差异信号传输能力.

结论:

  • 拟议的SMDCRP波器有效地抑制高速公交中的常态噪声.
  • 过器符合服务器和计算机系统中控制器和传感器的苛刻质量要求.
  • 这种解决方案减轻了EMI问题,提高了高速数据传输的可靠性.