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相关概念视频

Spherical and Cylindrical Capacitor01:26

Spherical and Cylindrical Capacitor

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A spherical capacitor consists of two concentric conducting spherical shells of radii R1 (inner shell) and R2 (outer shell). The shells have  equal and opposite charges of +Q and −Q, respectively. For an isolated conducting spherical capacitor, the radius of the outer shell can be considered to be infinite.
Conventionally, considering the  symmetry, the electric field between the concentric shells of a spherical capacitor is directed radially outward. The magnitude of the field,...
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Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

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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.
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Biasing of FET01:22

Biasing of FET

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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...
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Generator Voltage Control01:21

Generator Voltage Control

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Generator voltage control is crucial for maintaining the stable operation of synchronous generators and wind turbines. In older models, a DC generator driven by the rotor delivers DC power to the rotor's field winding, and the power is transferred through slip rings and brushes. In the latest models, static or brushless exciters are used. Static exciters rectify AC power from the generator terminals and then transfer the DC power directly to the rotor. Brushless exciters, on the other hand,...
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MOSFET Amplifiers01:17

MOSFET Amplifiers

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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...
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Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
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基于驱动电压调制的环形MEMS陀螺仪的范围扩展技术

Ke Cui1, Li Liu2, Daren An1

  • 1School of Instrument and Electronics, North University of China, Taiyuan 030051, China.

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|January 8, 2025
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概括

在微电机系统 (MEMS) 陀螺镜中控制驱动电压可以调整灵敏度. 较低的电压显著扩展陀螺仪的陀螺仪.

关键词:
在MEMS环旋镜旋转镜.检测开放循环的检测.驱动控制循环中的驱动控制循环.在电路内调试.不线性的非线性.范围扩展 扩展范围扩展

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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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科学领域:

  • 工程 工程师 工程师 工程师
  • 物理 物理学 物理
  • 材料科学 材料科学 材料科学

背景情况:

  • 微电机系统 (MEMS) 陀螺仪对于惯性传感至关重要.
  • 控制MEMS陀螺仪的灵敏度是优化各种应用的性能的关键.
  • 现有的灵敏度控制方法在范围和精度上可能有局限性.

研究的目的:

  • 为了研究驾驶控制电压与环形MEMS陀螺仪的操作范围之间的关系.
  • 开发一个数学模型,将驱动电压与陀螺仪灵敏度相关联起来.
  • 为了优化MEMS陀螺仪的性能在广泛的测量范围.

主要方法:

  • 使用微电机系统 (MEMS) 技术用于陀螺仪制造.
  • 系统地改变对MEMS陀螺仪应用的驾驶控制电压.
  • 评估陀螺仪性能指标,包括在不同电压下范围,分辨率和非线性.
  • 开发一个数学模型来描述电压敏感性关系.

主要成果:

  • 发现较低的驱动电压显著增加了MEMS陀螺仪的测量范围.
  • 在1.46V时,陀螺仪实现了±1000°/s的范围,比10.85V时的±200°/s增加了五倍.
  • 性能降低 (分辨率,非线性) 显著低于范围扩展的规模.
  • 与调制检测电路收益相比,在整个操作范围内实现了优化陀螺仪性能.

结论:

  • 调整驱动控制电压是调整环形MEMS陀螺仪灵敏度和范围的有效方法.
  • 已建立的数学模型为预测和控制陀螺仪行为提供了基础.
  • 这种基于电压的控制策略为提高MEMS陀螺仪在各种传感应用中的实用性提供了一个有希望的方法.