local oscillator

简明释义

本地振荡器本机振荡器

英英释义

例句

1.Adjusting the frequency of the local oscillator can help tune into different radio stations.

调整本地振荡器的频率可以帮助调谐到不同的广播电台。

2.In a superheterodyne receiver, the local oscillator plays a crucial role in mixing frequencies.

在超外差接收器中，本地振荡器在混频中起着至关重要的作用。

3.The performance of the local oscillator directly affects the sensitivity of the entire system.

本地振荡器的性能直接影响整个系统的灵敏度。

4.The radio receiver uses a local oscillator to convert incoming signals to a lower frequency.

这个收音机使用一个本地振荡器将接收到的信号转换为较低的频率。

5.An unstable local oscillator can lead to poor signal quality in communication systems.

不稳定的本地振荡器可能导致通信系统中的信号质量差。

作文

In the realm of electronics and telecommunications, the term local oscillator refers to a crucial component that generates a specific frequency signal used in various applications, particularly in radio receivers and transmitters. The local oscillator plays an essential role in the process of mixing signals, which is fundamental for frequency conversion. This process allows the system to receive and transmit signals at different frequencies effectively.To understand the importance of a local oscillator, it is helpful to consider how radio communication works. When a radio station broadcasts a signal, it transmits information modulated onto a carrier wave at a particular frequency. A radio receiver must be able to tune into this frequency to extract the information. Here, the local oscillator comes into play by generating a frequency that can mix with the incoming signal, producing an intermediate frequency (IF) that is easier to process.The operation of a local oscillator typically involves the use of a stable frequency source, such as a crystal oscillator. This stability is vital because any drift in the frequency can lead to poor reception or transmission quality. In many modern devices, such as smartphones and satellite communication systems, the local oscillator is integrated into complex circuits, allowing for miniaturization and improved performance.Moreover, the design of a local oscillator can vary significantly depending on the application. For instance, in direct conversion receivers, the local oscillator frequency is often set to match the incoming signal frequency, allowing for direct demodulation. In contrast, superheterodyne receivers utilize a fixed frequency offset, which simplifies the filtering and amplification processes.The significance of a local oscillator extends beyond just radio communications. It is also found in various other technologies, including radar systems, television broadcasting, and even in optical communications. In each of these applications, the local oscillator enables the manipulation of frequency signals, facilitating the efficient transmission and reception of information.In conclusion, the local oscillator is a fundamental element in the field of electronics, serving as a cornerstone for signal processing in numerous applications. Its ability to generate stable frequency signals makes it indispensable for effective communication systems. As technology continues to evolve, the design and implementation of local oscillators will likely advance, further enhancing their capabilities and applications in the ever-expanding world of electronics and telecommunications.

在电子和电信领域，术语本地振荡器指的是一种关键组件，它生成特定频率的信号，用于各种应用，特别是在无线接收器和发射器中。本地振荡器在混合信号的过程中发挥着重要作用，这是频率转换的基础。这一过程使系统能够有效地接收和传输不同频率的信号。要理解本地振荡器的重要性，考虑一下无线通信的工作原理是有帮助的。当广播电台发送信号时，它会在特定频率上调制信息并传输载波波。无线接收器必须能够调谐到这个频率，以提取信息。在这里，本地振荡器通过生成一个可以与输入信号混合的频率，产生一个更容易处理的中频（IF）。本地振荡器的操作通常涉及使用稳定的频率源，例如晶体振荡器。这种稳定性至关重要，因为频率的任何漂移都可能导致接收或传输质量差。在许多现代设备中，例如智能手机和卫星通信系统，本地振荡器被集成到复杂的电路中，从而实现小型化并提高性能。此外，本地振荡器的设计可以根据应用的不同而显著变化。例如，在直接转换接收器中，本地振荡器频率通常设置为与输入信号频率匹配，从而允许直接解调。相比之下，超外差接收器利用固定的频率偏移，这简化了过滤和放大过程。本地振荡器的重要性不仅限于无线通信。它还出现在各种其他技术中，包括雷达系统、电视广播甚至光通信。在每一个应用中，本地振荡器都能够操控频率信号，从而促进信息的高效传输和接收。总之，本地振荡器是电子领域中的一个基本元素，作为众多应用中信号处理的基石。它生成稳定频率信号的能力使其在有效的通信系统中不可或缺。随着技术的不断发展，本地振荡器的设计和实施可能会进一步进步，进一步增强其在不断扩展的电子和电信世界中的能力和应用。