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相关概念视频

MOSFET Amplifiers01:17

MOSFET Amplifiers

140
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...
140
Cascaded Op Amps01:16

Cascaded Op Amps

571
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
571
Small-Signal Analysis of MOSFET Amplifiers01:23

Small-Signal Analysis of MOSFET Amplifiers

488
In small-signal analysis, a MOSFET transistor amplifier acts as a linear amplifier when operating in its saturation region. The gate-to-source voltage (VGS) of the MOSFET is the sum of the DC biasing voltage and the small time-varying input signal. This combination sets up the operating point and modulates the drain current (ID) that flows from the drain to the source. When a small AC signal is superimposed on the DC bias voltage at the gate, the instantaneous drain current comprises three...
488
Operational Amplifiers01:17

Operational Amplifiers

738
The operational amplifier, often referred to as an op-amp, is a multifaceted building block of a circuit. This electronic component functions like a voltage-controlled voltage source and can also be used to create a voltage- or current-controlled current source. The design of an operational amplifier enables it to execute mathematical operations when external components like resistors and capacitors are linked to its terminals. An op-amp has the capacity to sum signals, amplify a signal,...
738
Cut-off Frequency of BJT01:17

Cut-off Frequency of BJT

606
Cut-off frequencies in Bipolar Junction Transistors (BJTs) mark the transition between the signal's pass band and stop band, influencing their performance in amplifying or attenuating frequencies. These frequencies are crucial for designing BJTs to meet specific operational requirements in electronic circuits.
Alpha Cut-Off Frequency: Pertinent to the common-base configuration, the alpha cut-off frequency defines the upper-frequency limit at which the current gain, alpha, remains stable. As...
606
BJT Amplifiers01:14

BJT Amplifiers

318
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.
In BJT amplifier configurations, particularly in common-emitter setups, the transistor's role...
318

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相关实验视频

Updated: May 25, 2025

A Procedure for Implanting Organized Arrays of Microwires for Single-unit Recordings in Awake, Behaving Animals
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一个紧的低功率切割器低噪音放大器,用于高密度的神经前端.

Alessandro Fava1, Francesco Centurelli1, Pietro Monsurrò1

  • 1Department of Information, Electronics and Telecommunication Engineering, Sapienza University of Rome, 00184 Roma, Italy.

Sensors (Basel, Switzerland)
|February 26, 2025
PubMed
概括

这项研究引入了用于神经记录的低功率直升机稳定低噪声放大器 (CS-LNA). 它有效地减少噪音和电极偏移,在紧的设计中实现最先进的性能.

关键词:
模拟前端 - 模拟前端生物放大器生物放大器切割,切割,切割,切割,切割,切割,切割,切割,切割,切割,切割,切割,切割,切割低噪音放大器的放大器神经记录神经记录

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科学领域:

  • 集成电路 集成电路
  • 生物医学工程 生物医学工程
  • 神经科学仪器仪器仪器仪表

背景情况:

  • 神经记录系统需要低噪音放大器来准确捕获大脑信号.
  • 闪噪声和电极直流偏移 (EDO) 是设计这些放大器的重大挑战.
  • 现有的解决方案往往会在电力消耗,面积或性能方面妥协.

研究的目的:

  • 介绍一款新型的机稳定低噪声放大器 (CS-LNA),优化用于像素内神经记录.
  • 为了在低噪音,高效的功率使用和小的面积方面实现高性能.
  • 为了证明CS-LNA在多通道时间分割多重复合 (TDM) 和强大的电极直流偏移 (EDO) 拒绝方面的能力.

主要方法:

  • 使用0.13微米CMOS工艺设计和制造一个CS-LNA.
  • 在没有直流伺服圈 (DSL) 的情况下,实施用于TDM,闪噪声降低和EDO排斥的机混合器.
  • 详细的噪声分析和设计流程,以优化输入引用噪声和区域之间的权衡.

主要成果:

  • 该CS-LNA实现了4.19μVrms (1-7.5 kHz) 和2.58μVrms (300 Hz-7.5 kHz) 的整体噪声.
  • 显示了2.63 (1.62) 的高噪声效率系数 (NEF) 和38.67dB的最大增益.
  • 制造面积为0.0268mm2,功耗在0.8V时为~2μA,并且可以承受±50mV的输入偏移.

结论:

  • 拟议的CS-LNA为像素内神经记录系统提供了最先进的性能.
  • 它的低功耗,小面积和高效的噪声/抵消排斥使其适用于多通道应用.
  • 该设计成功地解决了当前神经放大器技术的关键局限性.