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相关概念视频

Half wave rectifier01:20

Half wave rectifier

A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
Full wave rectifier01:22

Full wave rectifier

A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
Bridge rectifier01:24

Bridge rectifier

The bridge rectifier is essential in electronics for efficiently converting alternating current (AC) to direct current (DC). Comprised of four diodes configured in a bridge layout, this rectifier effectively processes both the positive and negative halves of the AC waveform, making it superior to half-wave and full-wave center-tapped rectifiers in terms of voltage regulation and output stability.
Operationally, the bridge rectifier allows current flow through two of its diodes during each...
Voltage Doubler Circuit01:23

Voltage Doubler Circuit

A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.
Clipper Circuit01:18

Clipper Circuit

A clipper circuit is a fundamental wave-shaping device that harnesses the unique properties of diodes to alter and control waveform characteristics. This technology is widely used in electronic devices, especially in television and radar communication systems, where it enhances waveform modulation in both transmitters and receivers.
The operation of a clipper circuit can be exemplified by analyzing a dual-clipper configuration setup that integrates two ideal diodes, each paired with a biasing...
The Ideal Diode01:15

The Ideal Diode

A diode is a semiconductor device that allows current to flow in one direction only, making it a crucial component in electronic circuits for controlling the direction of current flow. An ideal diode is a simplified version of a real diode used to understand how diodes work in circuits. It possesses two terminals: the positive anode and the cathode, which is negative. When a positive voltage is applied to the anode relative to the cathode, the diode is in a forward-biased state, allowing...

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Updated: May 30, 2026

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
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High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition

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一个分子半波整流器.

Christian A Nijhuis1, William F Reus, Adam C Siegel

  • 1Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543. christian.nijhuis@nus.edu.sg

Journal of the American Chemical Society
|August 17, 2011
PubMed
概括
此摘要是机器生成的。

用铁基组功能化的自组合单层 (SAM) 通过在交流电路中启用独特的电荷传输机制,实现高效的半波整形. 这些分子连接显示了高的整形比率,超过了没有铁基的分子连接.

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科学领域:

  • 分子电子学分子电子学
  • 纳米技术 纳米技术
  • 有机电子 有机电子

背景情况:

  • 分子连接对于开发纳米电子设备至关重要.
  • 自组装单层 (SAM) 为工程分子连接提供了一个多功能平台.
  • 校正,即将交流信号转换为直流信号,是一种基本的电子功能.

研究的目的:

  • 研究基于SAM的分子连接作为半波整流器的性能.
  • 在AC偏向下探索这些交叉点的电荷传输机制.
  • 为了比较 ferrocenyl-terminated 和 non-terminated SAM 之间的纠正性能.

主要方法:

  • 使用超平面的银电极和优的-顶电极制造分子连接点.
  • 使用的自组装单层是11-铁) -1-无乙醇和1-无乙醇.
  • 进行了交流和直流电力测量,以分析电荷传输和整顿效率.

主要成果:

  • 用铁结末的SAM表现出显著的纠正 (R > 100),而非结末的SAM则没有.
  • 交流测量显示了不同偏差级别的不同电荷运输模式 (直接道,福勒-诺德海姆道,跳转).
  • 用铁结尾的SAM显示了三个前向偏差和两个反向偏差,从而实现了高效的半波纠正.

结论:

  • 在SAM中,铁烯基部分对于实现高效的分子整形至关重要.
  • 交流测量提供了比直流测量更高偏差的电荷传输机制的洞察力.
  • 铁结末型SAM中的不对称电荷传输是它们整正能力的原因.