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相关概念视频

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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A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
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BJT Amplifiers01:14

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Bipolar Junction Transistors (BJTs) are pivotal components in amplifier circuits, functioning as voltage-controlled current sources in their active region. This characteristic allows them to efficiently control the collector current through variations in the base-emitter voltage. Essentially, BJTs amplify power due to their ability to take a weak input signal and output a much stronger signal.
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When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze...
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光不敏感的有机太阳能功率放大器

Qiang Wu1, Shijie Wang1, Wei Gao2

  • 1State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China.

Nature communications
|November 27, 2025
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种低功耗,自动供电的可穿戴生物传感器,使用双有机电化学晶体管 (OECT) 和有机太阳能电池 (OSC). 这种新的设计提供了稳定的生理信号监测,克服了以前单个OECT传感器的局限性.

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科学领域:

  • 生物医学工程 生物医学工程
  • 材料科学 材料科学 材料科学
  • 收集能源 收集能源

背景情况:

  • 可穿戴生物传感器对于电生理学监测至关重要.
  • 目前使用单个有机电化学晶体管 (OECT) 和有机太阳能电池 (OSC) 的设备存在不稳定的输出,特别是在低光下,以及能源自主性差.
  • 限制包括OECT不稳定性和OSC性能问题.

研究的目的:

  • 开发一种低功耗,自动供电的生理传感器,具有增强的稳定性和自主性.
  • 通过采用双OECT配置来改善单OECT生物传感器的限制.
  • 为了实现长期的,按需的可穿戴式监控,而无需外部电源.

主要方法:

  • 集成一个双OECT配置连接在系列.
  • 通过优化的灵活有机太阳能电池 (OSC) 为传感器供电.
  • 设备附着在人体皮肤上,用于信号采集.

主要成果:

  • 与单个OECT传感器相比,双OECT传感器显示出更稳定的信号输出和更快的响应.
  • 优化的OSC提高了设备的灵活性和抑制电荷重组,提高了稳定性.
  • 对心电图,肌电图和眼电图的稳定监测在广泛的照明范围 (500-50,000 lux) 中实现.

结论:

  • 开发的低功耗,自动供电的生物传感器为可穿戴应用提供了一个简单的架构.
  • 这项技术消除了对外部能源供应或储存的需求,促进了持续监控.
  • 该传感器具有实时疾病诊断和预防的巨大潜力.