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相关概念视频

Equivalent Capacitance01:19

Equivalent Capacitance

1.4K
Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
The following strategies are adopted to calculate...
1.4K
Capacitors and Capacitance01:18

Capacitors and Capacitance

7.6K
A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
7.6K
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

792
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.
792
Capacitors01:15

Capacitors

442
Capacitors play a crucial role in car radios, where they filter and store frequencies to ensure clear signal reception. Essentially serving as energy storage devices, capacitors store energy within their electric field and are composed of two parallel conducting plates separated by a dielectric.
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
442
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...
4.7K
MOS Capacitor01:25

MOS Capacitor

812
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
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相关实验视频

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Scanning-probe Single-electron Capacitance Spectroscopy
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驱动级容量分析技术的分辨率.

Xin Zhang1, Yang Ma2, Zihang Zhang2

  • 1Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China.

The Review of scientific instruments
|October 20, 2023
PubMed
概括

本研究介绍了一种分析驱动级容量分析 (DLCP) 范围和分辨率的方法. 它评估了DLCP.

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科学领域:

  • 半导体物理 半导体物理
  • 材料科学 材料科学 材料科学

背景情况:

  • 驱动级容量分析 (DLCP) 是一种用于描述半导体缺陷分布的关键技术.
  • 现有的DLCP方法缺乏对其测量范围和分辨率的详细分析,阻碍了准确的缺陷概况评估.

研究的目的:

  • 开发一种新的方法来分析DLCP的空间和能量范围和分辨率.
  • 建立一个基于特定仪器的限制来评估DLCP的有效性的框架.

主要方法:

  • 重新检查DLCP方程以确定错误来源和分辨率限制.
  • 应用错误传播理论来计算基于仪表系统错误和设备阻抗的DLCP分辨率.
  • 在DLCP中分析交流信号范围 (δV) 的空间分布.

主要成果:

  • 识别了仪表系统错误和设备阻抗作为限制DLCP分辨率的主要因素.
  • 开发了一种计算DLCP空间分辨率的方法,可适应不同的测试仪器.
  • 提供最小交流信号选择范围 (δV) 的空间分布.

结论:

  • 拟议的方法可以对DLCP的空间和能量分辨率进行定量评估.
  • 这种分析对于评估通过DLCP.获得的缺陷概况可靠性至关重要.
  • 这些发现有助于为准确的DLCP测量选择合适的测试仪器.