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相关概念视频

PI Controller: Design01:24

PI Controller: Design

1.2K
Proportional Integral (PI) controllers are a fundamental component in modern control systems, widely used to enhance performance and mitigate steady-state errors. They are particularly effective in applications such as automatic brightness adjustment on smartphones, where they excel at mitigating steady-state errors for step-function inputs. Unlike PD controllers, which require time-varying errors to function optimally, PI controllers leverage their integral component to address residual...
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Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

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Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
528
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

1.5K
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.
1.5K
MOSFET Amplifiers01:17

MOSFET Amplifiers

491
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...
491
Cascaded Op Amps01:16

Cascaded Op Amps

1.1K
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...
1.1K
Small-Signal Analysis of MOSFET Amplifiers01:23

Small-Signal Analysis of MOSFET Amplifiers

1.1K
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...
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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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基于切割器稳定电容合放大器的新型调节型伪电阻及其基于机器学习的应用程序.

Mohammad Aleem Farshori1, M Nizamuddin1, Renuka Chowdary Bheemana2

  • 1Department of Electronics and Communication Engineering, Jamia Millia Islamia, New Delhi 110025, India.

Micromachines
|September 27, 2025
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概括

这项研究引入了一种新的FinFET生物潜能放大器,具有增强的常态排斥比率 (CMRR) 和高增益. 该电路使用反缓冲器和可调节的伪电阻来提高线性和生物信号采集,在心律失常诊断中达到99.12%的准确性.

关键词:
在CMRR中,CMRR是指CMRR.在FINFET的基础上.生物信号的生物信号升降机稳定器的稳定器机器学习是机器学习.伪电阻器 伪电阻器

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科学领域:

  • 电子工程 电子工程
  • 生物医学工程 生物医学工程
  • 信号处理 信号处理

背景情况:

  • 生物潜能放大器对于获取生理信号至关重要.
  • 高常态排斥比率 (CMRR) 对于准确的生物信号测量至关重要.
  • 现有的放大器设计往往面临着线性和常态信号抑制的挑战.

研究的目的:

  • 开发一种基于FinFET的高收益,高CMRR的生物潜能放大器.
  • 引入一种新的技术来降低常态增益并增强CMRR.
  • 为了研究可调节伪电阻的性能,以提高线性和可调节的低切断频率.

主要方法:

  • 采用了一个带有反缓冲器的容量合机稳定电路.
  • 传统的伪电阻被替换为可调节的平行电池配置.
  • 整合了一个直升机尖峰过器,以减轻切换尖峰.
  • 开发了一个机器学习模型 (CNN+LSTM) 用于心律失常的诊断.

主要成果:

  • 放大器实现了 42.6 dB 的中频带增益和 6.96 Hz 到 621 Hz 的带宽.
  • 噪声效率系数 (NEF) 为6.1,功率消耗为0.92μW.
  • 随着反缓冲器的使用,CMRR达到106.9dB,CNN+LSTM模型实现了99.12%的心律失常诊断准确度.

结论:

  • 拟议的FinFET生物潜能放大器为生物信号采集提供了卓越的CMRR和线性.
  • 新的CMRR降低技术和可调节的伪电阻器提供了显著的性能改进.
  • 综合机器学习模型在通过生物信号诊断心律失常方面表现出高准确度.