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相关概念视频

Linear Approximation in Frequency Domain01:26

Linear Approximation in Frequency Domain

92
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
92
Design Example: Underdamped Parallel RLC Circuit01:17

Design Example: Underdamped Parallel RLC Circuit

298
Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
298
Modeling of Diode Forward Characteristics01:19

Modeling of Diode Forward Characteristics

544
Understanding the behavior of diodes when forward-biased is a fundamental aspect of electronic circuit design and analysis. This analysis primarily utilizes two models: the exponential diode model and the constant-voltage-drop model. The exponential model comes into play when the source voltage exceeds 0.5 volts, pushing the diode current to rise exponentially above the saturation current. This relationship is graphically depicted in the current-voltage (I-V) curve, illustrating the diode's...
544
Transformers with Off-Nominal Turns Ratios01:25

Transformers with Off-Nominal Turns Ratios

160
In scenarios involving parallel transformers with disparate ratings, developing per-unit models requires accommodating off-nominal turns ratios. This situation arises when the selected base voltages are not proportional to the transformer’s voltage ratings. Consider a transformer where the rated voltages are related by the term a. If the chosen voltage bases satisfy a relationship involving term b, term c is defined as the ratio of these bases. This ratio is then substituted into the...
160
RLC Circuit as a Damped Oscillator01:30

RLC Circuit as a Damped Oscillator

1.0K
An RLC circuit combines a resistor, inductor, and capacitor, connected in a series or parallel combination.
Consider a series RLC circuit. Here, the presence of resistance in the circuit leads to energy loss due to joule heating in the resistance. Therefore, the total electromagnetic energy in the circuit is no longer constant and decreases with time. Since the magnitude of charge, current, and potential difference continuously decreases, their oscillations are said to be damped. This is...
1.0K
RL Circuit without Source01:14

RL Circuit without Source

912
When a DC source is suddenly disconnected from an RL (Resistor-Inductor) circuit, the circuit becomes source-free. Assuming the inductor has an initial current denoted as I0, the initial energy stored in the inductor can be determined.
Applying Kirchhoff's voltage law around the loop of the circuit and substituting the voltages across the inductor and resistor yields a first-order differential equation. A logarithmic equation is obtained by rearranging the terms in this equation,...
912

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相关实验视频

Updated: Jul 9, 2025

Modeling Fast-scan Cyclic Voltammetry Data from Electrically Stimulated Dopamine Neurotransmission Data Using QNsim1.0
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基于速度方程的有效和系统的参数提取,由DFB等效电路模型进行.

Qingan Ding, Qunying Yang, Jianyu Li

    Optics express
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    PubMed
    概括
    此摘要是机器生成的。

    本研究提出了一种高效的方法,用于使用同等电路模型提取分布式反 (DFB) 激光器的参数,从而降低了实验复杂性. 该技术准确地模拟了激光性能,为半导体激光表征提供了多功能解决方案.

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    相关实验视频

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    科学领域:

    • 半导体设备物理学的物理
    • 激光工程 激光工程
    • 电气工程 电气工程 电气工程

    背景情况:

    • 对于分布式反 (DFB) 激光器来说,传统的参数提取通常是繁的,需要广泛的实验.
    • 对DFB激光器进行准确的建模对于优化其性能和了解其行为至关重要.

    研究的目的:

    • 开发一种高效和系统的方法,用于DFB激光器的参数提取.
    • 创建一个相当的电路模型,准确地表示内在和外在激光参数.
    • 通过实验测量和与现有模型进行比较来验证拟议的方法.

    主要方法:

    • 开发一个相当的电路模型,将速率方程中的内在参数和外在参数结合起来.
    • 使用DFB激光芯片测量电子和光学性能的实验验证.
    • 使用开发的技术提取九个内在参数和五个外在参数.
    • 模拟和测量激光输出特征的比较.

    主要成果:

    • 拟议的同等电路模型成功地结合了基本的内在和外在参数.
    • 实验验证表明,模拟和测量激光输出特征之间的良好一致性.
    • 该方法有效地从实验数据中提取了9个内在参数和5个外在参数.
    • 这种技术被证明适用于其他半导体激光器,可用速率方程来描述.

    结论:

    • 开发的等效电路模型和参数提取方法为DFB激光器提供了高效和系统的解决方案.
    • 与传统技术相比,该方法可以更好地近似实际的激光行为.
    • 模型和提取方法的可靠性通过实验结果和与已发表模型的比较来验证.