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相关概念视频

Non-ohmic Devices00:51

Non-ohmic Devices

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In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...
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Gyroscope01:02

Gyroscope

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A gyroscope is defined as a spinning disk in which the axis of rotation is free to assume any orientation. When spinning, the orientation of the spin axis is unaffected by the orientation of the body that encloses it. The body or vehicle enclosing the gyroscope can be moved from place to place, while the orientation of the spin axis remains the same. This makes gyroscopes very useful in navigation, especially where magnetic compasses cannot be used, such as in crewed and crewless spacecraft,...
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Magnetic Damping01:17

Magnetic Damping

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Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
504
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

391
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
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MOSFET01:16

MOSFET

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The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...
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Gyroscope: Precession01:24

Gyroscope: Precession

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Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...
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相关实验视频

Updated: Jul 25, 2025

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
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一个低噪音接口ASIC用于MEMS磁盘共振器陀螺仪.

Wenbo Zhang1,2, Liang Yin1,2, Yihang Wang1,2

  • 1MEMS Center, Harbin Institute of Technology, Harbin 150001, China.

Micromachines
|June 28, 2023
PubMed
概括

本研究介绍了一种低噪音的特定应用集成电路 (ASIC) 用于微电子机械系统 (MEMS) 磁盘共振器陀螺仪 (DRG). 新的设计实现了卓越的性能,降低了噪音,提高了陀螺仪的精度.

关键词:
在ASIC的基础上,ASIC是ASIC.在MEMS磁盘共振器陀螺仪,陀螺仪.角度随机步行 随机步行偏见的不稳定性 偏见的不稳定性力量重新平衡的力量.

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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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Last Updated: Jul 25, 2025

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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科学领域:

  • * 电气工程 电气工程
  • * 机械工程 机械工程
  • * 传感器技术 * 传感器技术

背景情况:

  • *微电机械系统 (MEMS) 磁盘共振器陀螺仪 (DRG) 对于惯性导航至关重要.
  • *现有的DRG接口电路面临着噪声和准确性方面的挑战.
  • *强制再平衡 (FTR) 模式操作需要复杂的控制电路.

研究的目的:

  • *为在FTR模式下运行的MEMS DRG提出一个低噪声的应用特定集成电路 (ASIC).
  • * 开发一个集成的自钟电路,以减少组件数量.
  • * 实施系统级噪声模型,以识别和减轻噪声源.

主要方法:

  • * ASIC的设计包括模拟闭环控制 (自我激发的驱动,速率和方位循环).
  • * 集成Sigma-Delta (ΣΔ) 调制器和数字过器,用于模拟到数字转换.
  • * 开发了一种自钟电路,以消除对外部石英晶体的需求.
  • *系统级噪声建模和分析,以识别和最小化噪声贡献.
  • *实施噪声优化战略,以减轻1/f和白噪声.

主要成果:

  • * 达到角随机步行 (ARW) 的0.0075°/√h.
  • * 达到0.038°/h的偏差不稳定性 (BI).
  • *以0.35微米工艺制造的ASIC,模具面积为4.4mm × 4.5mm.
  • * 证明低功耗50mW的低功耗.
  • *成功避免了PI放大器的1/f噪声和反元件的白噪声.

结论:

  • * 拟议的低噪音ASIC显著提高了MEMS DRG的性能.
  • * 集成设计和噪声优化技术对于芯片级实施是有效的.
  • * 自动计时电路简化了系统架构,减少了外部组件.
  • * 取得的ARW和BI指标代表了陀螺仪技术的重大进步.