directly heated cathode

简明释义

直热式阴极

英英释义

例句

1.The vacuum tube operates efficiently thanks to the use of a directly heated cathode.

真空管由于使用了直接加热阴极而高效运行。

2.Engineers prefer a directly heated cathode in certain electronic devices due to its simplicity.

工程师在某些电子设备中更喜欢使用直接加热阴极，因为它简单易用。

3.In high-frequency applications, a directly heated cathode can provide quicker response times.

在高频应用中，直接加热阴极可以提供更快的响应时间。

4.The longevity of a directly heated cathode can be affected by operating temperature.

直接加热阴极的寿命可能会受到工作温度的影响。

5.The design of the amplifier includes a directly heated cathode for improved sound quality.

放大器的设计包括一个直接加热阴极以改善音质。

作文

The development of modern electronics has brought about numerous advancements, particularly in the realm of vacuum tubes and their applications. One significant component within this technology is the directly heated cathode, which plays a crucial role in the functioning of various electronic devices. To understand its importance, we must first explore what a cathode is and how it operates. A cathode is an electrode through which electric current leaves a polarized electrical device. In the context of vacuum tubes, the directly heated cathode serves as a source of electrons, which are essential for the tube's operation.The directly heated cathode consists of a filament that is heated by passing an electric current through it. This heating process causes the cathode to emit electrons due to thermionic emission, a phenomenon where electrons gain enough energy to escape from the surface of the material. This mechanism is fundamental to the operation of many types of vacuum tubes, including amplifiers and oscillators, which are vital in radio transmission and audio equipment.One of the primary advantages of using a directly heated cathode is its ability to provide a high level of electron emission with relatively low power consumption. This efficiency makes it ideal for applications where space and energy are at a premium. For instance, in portable electronic devices, the directly heated cathode allows for compact designs without sacrificing performance.Additionally, the directly heated cathode offers a rapid warm-up time compared to indirectly heated counterparts. This characteristic is particularly beneficial in applications requiring immediate operational readiness, such as in communication equipment where quick signal transmission is critical. The fast response time of the directly heated cathode ensures that devices can operate efficiently and reliably under varying conditions.However, there are also challenges associated with the use of directly heated cathodes. One notable issue is the potential for thermal instability. Since the cathode is directly heated, fluctuations in power supply can lead to variations in temperature, which may affect the consistency of electron emission. Engineers and designers must carefully consider these factors when incorporating directly heated cathodes into their systems.In conclusion, the directly heated cathode is a pivotal element in the field of electronics, contributing to the functionality and efficiency of various devices. Its ability to emit electrons quickly and efficiently makes it a preferred choice in many applications, despite some inherent challenges. As technology continues to evolve, the role of the directly heated cathode will undoubtedly remain significant, paving the way for further innovations in electronic design and functionality.

现代电子技术的发展带来了许多进步，特别是在真空管及其应用领域。其中一个重要的组件是直接加热阴极，它在各种电子设备的功能中发挥着关键作用。要理解其重要性，我们首先必须探讨什么是阴极以及它是如何工作的。阴极是一个电极，通过它电流离开极化的电气设备。在真空管的背景下，直接加热阴极作为电子源，对于管子的操作至关重要。直接加热阴极由一个通过电流加热的灯丝组成。这一加热过程使阴极因热电子发射而发射电子，这是一种现象，其中电子获得足够的能量从材料表面逃逸。这个机制对于许多类型的真空管的操作是基础，包括放大器和振荡器，这些在无线电传输和音频设备中至关重要。使用直接加热阴极的主要优点之一是它能够以相对较低的功耗提供高水平的电子发射。这种效率使其非常适合空间和能源有限的应用。例如，在便携式电子设备中，直接加热阴极允许紧凑的设计而不牺牲性能。此外，直接加热阴极相较于间接加热的阴极具有快速的升温时间。这一特性在需要立即操作准备的应用中尤为有利，例如在通信设备中，快速信号传输至关重要。直接加热阴极的快速响应时间确保设备在各种条件下都能高效可靠地运行。然而，使用直接加热阴极也存在一些挑战。一个显著的问题是热不稳定性。由于阴极是直接加热的，电源波动可能导致温度变化，这可能影响电子发射的一致性。在将直接加热阴极纳入系统时，工程师和设计师必须仔细考虑这些因素。总之，直接加热阴极是电子领域中的一个关键元素，为各种设备的功能和效率做出了贡献。它快速高效地发射电子，使其在许多应用中成为首选，尽管存在一些固有的挑战。随着技术的不断发展，直接加热阴极的角色无疑将继续保持重要性，为电子设计和功能的进一步创新铺平道路。