common emitter

简明释义

共发射极

英英释义

例句

1.When designing a radio frequency amplifier, engineers often choose a common emitter configuration for better performance.

在设计射频放大器时，工程师们通常选择共发射极 配置以获得更好的性能。

2.The voltage gain of a common emitter amplifier can be calculated using the transistor's parameters.

可以通过计算晶体管的参数来得到共发射极 放大器的电压增益。

3.The common emitter stage provides phase inversion, making it useful in many applications.

该共发射极 级别提供了相位反转，使其在许多应用中非常有用。

4.In a typical amplifier circuit, the common emitter 共发射极 configuration is widely used for its high gain.

在典型的放大器电路中，共发射极 配置因其高增益而被广泛使用。

5.In educational labs, students often build a common emitter circuit to learn about transistor operation.

在教育实验室中，学生们经常构建一个共发射极 电路以学习晶体管的工作原理。

作文

The concept of a common emitter configuration is fundamental in the field of electronics, particularly in the design and analysis of transistor amplifiers. A common emitter amplifier is one of the most widely used transistor amplifier configurations because it provides significant voltage gain and is relatively simple to construct. In this configuration, the emitter terminal of the transistor is common to both the input and output circuits, which is where the name originates. When we look at the basic operation of a common emitter amplifier, we can see that it takes an input signal applied between the base and emitter terminals and produces an output signal that is taken from the collector and emitter terminals. This arrangement allows for a phase inversion, meaning that if the input signal goes positive, the output signal goes negative, and vice versa. This characteristic is crucial for various applications, including audio amplification and signal processing.One of the key advantages of a common emitter configuration is its ability to provide high voltage gain, which is often desired in many electronic applications. The voltage gain can be calculated using the formula: Av = -Rc/Re, where Rc is the collector resistor and Re is the emitter resistor. This means that by carefully selecting the resistor values, engineers can achieve the desired amplification level. Additionally, the common emitter amplifier has a relatively high input impedance and low output impedance, making it suitable for interfacing with other circuit stages without significant signal loss.However, there are also challenges associated with the common emitter configuration. For instance, the phase inversion can complicate the design of multi-stage amplifiers, as the output of one stage may need to be inverted again to maintain the desired signal polarity. Moreover, the biasing of the transistor must be carefully managed to ensure that it operates in the active region, avoiding distortion or cutoff during signal fluctuations. In practical applications, a common emitter amplifier can be found in various devices, such as radios, televisions, and audio equipment. These amplifiers are often used in the first stage of amplification, where they boost weak signals coming from antennas or sensors before further processing. The versatility of the common emitter configuration makes it a staple in both hobbyist projects and professional electronic designs.In conclusion, understanding the common emitter configuration is essential for anyone interested in electronics. Its ability to amplify signals effectively while providing phase inversion and high voltage gain makes it a popular choice among engineers and hobbyists alike. As technology continues to advance, the principles behind the common emitter amplifier remain relevant, showcasing the enduring importance of this foundational electronic component in modern circuitry.

‘共发射极’配置是电子学领域中的一个基本概念，尤其是在晶体管放大器的设计和分析中。‘共发射极’放大器是应用最广泛的晶体管放大器配置之一，因为它提供了显著的电压增益，并且相对容易构建。在此配置中，晶体管的发射极端子对输入和输出电路是共同的，这也是其名称的来源。当我们查看‘共发射极’放大器的基本操作时，可以看到它接受施加在基极和发射极端子之间的输入信号，并产生从集电极和发射极端子取出的输出信号。这种排列允许相位反转，这意味着如果输入信号变为正，输出信号则变为负，反之亦然。这一特性对于各种应用至关重要，包括音频放大和信号处理。‘共发射极’配置的一个主要优点是其提供高电压增益的能力，这在许多电子应用中都是所期望的。电压增益可以使用公式计算：Av = -Rc/Re，其中Rc是集电极电阻，Re是发射极电阻。这意味着通过仔细选择电阻值，工程师可以实现所需的放大水平。此外，‘共发射极’放大器具有相对高的输入阻抗和低的输出阻抗，使其适合与其他电路阶段接口，而不会造成显著的信号损失。然而，与‘共发射极’配置相关的挑战也存在。例如，相位反转可能会使多级放大器的设计复杂化，因为一个阶段的输出可能需要再次反转，以保持所需的信号极性。此外，必须仔细管理晶体管的偏置，以确保其在主动区域内工作，避免在信号波动期间出现失真或截止。在实际应用中，‘共发射极’放大器可以在各种设备中找到，例如收音机、电视和音频设备。这些放大器通常用于放大第一阶段，在此阶段，它们增强来自天线或传感器的微弱信号，然后进行进一步处理。‘共发射极’配置的多功能性使其成为业余项目和专业电子设计中的主流。总之，理解‘共发射极’配置对于任何对电子学感兴趣的人来说都是至关重要的。它有效放大信号的能力，同时提供相位反转和高电压增益，使其成为工程师和爱好者的热门选择。随着技术的不断进步，‘共发射极’放大器背后的原理仍然具有相关性，展示了这一基础电子元件在现代电路中的持久重要性。