intermediate frequency

简明释义

中高频中间频率中频

英英释义

例句

1.Adjusting the intermediate frequency 中频 can significantly affect the performance of the audio equipment.

调整中频 intermediate frequency可以显著影响音频设备的性能。

2.In radio communications, the signal is often converted to an intermediate frequency 中频 for easier processing.

在无线电通信中，信号通常被转换为中频 intermediate frequency以便于处理。

3.The intermediate frequency 中频 stage in a superheterodyne receiver helps improve selectivity.

超外差接收器中的中频 intermediate frequency阶段有助于提高选择性。

4.The design of the filter is crucial at the intermediate frequency 中频 to eliminate unwanted signals.

滤波器的设计在中频 intermediate frequency时至关重要，以消除不必要的信号。

5.Many television tuners use an intermediate frequency 中频 of 45 MHz for signal processing.

许多电视调谐器使用45 MHz的中频 intermediate frequency进行信号处理。

作文

In the realm of electronics and communication, the term intermediate frequency refers to a crucial stage in the process of signal processing. It is a frequency to which a carrier frequency is shifted as part of the process of modulation. This concept is particularly significant in radio and television broadcasting, where it plays an essential role in demodulating the signals that are transmitted over the airwaves. The use of an intermediate frequency allows for more efficient filtering and amplification of signals, which is vital for maintaining the clarity and quality of the audio and video output.Understanding the function of intermediate frequency requires a basic grasp of how modulation works. Modulation is the technique used to encode information onto a carrier wave by varying its amplitude, frequency, or phase. Once the signal has been modulated, it is transmitted through the air. However, the original information is not immediately accessible in this form. Therefore, receivers must demodulate the signal to retrieve the original message.The process of demodulation often involves converting the received high-frequency signals into lower frequencies. This is where the intermediate frequency comes into play. By shifting the frequency of the incoming signal to an intermediate frequency, receivers can utilize simpler and more effective circuitry to process the signal. Typically, the intermediate frequency is chosen to be low enough to allow for efficient amplification but high enough to avoid interference from unwanted signals.One of the primary advantages of using an intermediate frequency is that it simplifies the design of the receiver. With a fixed intermediate frequency, the receiver can be designed to filter out noise and other unwanted signals more effectively, leading to improved overall performance. This is especially important in environments where multiple signals may be present, such as urban areas with many radio stations.Moreover, the use of an intermediate frequency also facilitates the implementation of automatic gain control (AGC). AGC is a system that automatically adjusts the gain of the receiver based on the strength of the incoming signal. By working at the intermediate frequency, the AGC can respond more effectively to fluctuations in signal strength, ensuring that the output remains stable and clear.In summary, the concept of intermediate frequency is fundamental in the field of communications technology. It serves as a bridge between the high-frequency signals transmitted and the lower frequencies that can be easily processed and understood. The application of intermediate frequency techniques has revolutionized the way we receive and interpret audio and visual media, making it possible for us to enjoy clear and reliable broadcasts. As technology continues to advance, the importance of understanding intermediate frequency will only grow, as it remains a key component in the ongoing evolution of communication systems.

在电子和通信领域，短语中频指的是信号处理过程中一个关键的阶段。它是一个载波频率在调制过程中被转移到的频率。这个概念在无线电和电视广播中尤为重要，因为它在解调通过空气传播的信号时发挥着至关重要的作用。使用中频可以更有效地过滤和放大信号，这对于维持音频和视频输出的清晰度和质量至关重要。理解中频的功能需要对调制如何工作有一个基本的了解。调制是一种技术，通过改变载波波的幅度、频率或相位，将信息编码到载波波上。一旦信号被调制，就会通过空气传播。然而，原始信息并不能立即以这种形式访问。因此，接收器必须对信号进行解调，以检索原始消息。解调过程通常涉及将接收到的高频信号转换为较低的频率。这就是中频发挥作用的地方。通过将接收到的信号频率转换为中频，接收器可以利用更简单和更有效的电路来处理信号。通常，中频被选择为足够低，以便于有效放大，但又足够高，以避免来自不必要信号的干扰。使用中频的主要优点之一是简化了接收器的设计。通过固定的中频，接收器可以设计得更有效地过滤噪声和其他不必要的信号，从而提高整体性能。这在多信号可能存在的环境中尤其重要，例如有许多广播电台的城市地区。此外，使用中频还促进了自动增益控制（AGC）的实现。AGC是一个系统，根据接收到的信号强度自动调整接收器的增益。通过在中频下工作，AGC可以更有效地响应信号强度的波动，确保输出保持稳定和清晰。总之，中频的概念在通信技术领域是基础性的。它作为高频信号和可以轻松处理和理解的低频信号之间的桥梁。中频技术的应用彻底改变了我们接收和解释音频和视觉媒体的方式，使我们能够享受清晰可靠的广播。随着科技的不断进步，理解中频的重要性只会增加，因为它仍然是通信系统不断发展的关键组成部分。