frequency-modulated receiver

简明释义

调频接收机

英英释义

例句

1.In amateur radio, a good frequency-modulated receiver can significantly improve communication range.

在业余无线电中，良好的频率调制接收器可以显著提高通信范围。

2.Many modern cars come equipped with a frequency-modulated receiver to enhance the listening experience.

许多现代汽车配备了频率调制接收器以增强听觉体验。

3.The frequency-modulated receiver is crucial for clear audio transmission in radio communications.

在无线电通信中，频率调制接收器对清晰的音频传输至关重要。

4.The scientist explained how the frequency-modulated receiver works during the seminar.

科学家在研讨会上解释了频率调制接收器的工作原理。

5.The technician repaired the frequency-modulated receiver to ensure it could pick up all available stations.

技术人员修理了频率调制接收器，以确保它能够接收到所有可用的电台。

作文

In the world of communication technology, the role of a frequency-modulated receiver is crucial. This device is designed to demodulate signals that have been modulated using frequency modulation (FM). FM is a method of encoding information in a carrier wave by varying its frequency. The frequency-modulated receiver is essential for converting these signals back into a format that can be understood by human users, such as audio or video. To understand the importance of a frequency-modulated receiver, we must first look at how FM works. In frequency modulation, the amplitude of the carrier signal remains constant while its frequency changes according to the information being sent. This technique is widely used in radio broadcasting because it provides better sound quality and is less susceptible to noise compared to amplitude modulation (AM). As a result, FM radio stations are able to deliver clearer audio, making the listener's experience much more enjoyable.The frequency-modulated receiver plays a vital role in this process. When a radio station transmits an FM signal, the frequency-modulated receiver picks up the varying frequencies of the signal. It uses a demodulation process to decode the changes in frequency back into the original audio signal. This is done using various techniques, including phase-locked loops and discriminators, which help to accurately retrieve the information encoded in the FM signal.One of the key advantages of using a frequency-modulated receiver is its ability to filter out noise. Since FM signals are less affected by amplitude fluctuations, the receiver can effectively eliminate unwanted interference, resulting in a clearer output. This characteristic makes FM receivers particularly popular in environments with high levels of electromagnetic interference, such as urban areas.Moreover, the technology behind frequency-modulated receivers has evolved significantly over the years. Modern receivers often come equipped with digital signal processing (DSP) capabilities, allowing for even greater clarity and the ability to handle multiple signals simultaneously. This advancement has made it possible for listeners to enjoy a wide range of stations without the static and distortion that older models would have experienced.In addition to traditional radio applications, frequency-modulated receivers are also used in various other fields. For example, they are commonly found in television broadcasting, where they help to decode the audio component of the transmitted signal. Furthermore, FM receivers are utilized in two-way radios, such as those used by emergency services, ensuring reliable communication in critical situations.In conclusion, the frequency-modulated receiver is an indispensable component of modern communication systems. Its ability to demodulate frequency-modulated signals allows for the clear transmission of audio and video information. As technology continues to advance, we can expect to see further improvements in the functionality and performance of frequency-modulated receivers, solidifying their place in the future of communication technology.

在通信技术的世界中，频率调制接收器的作用至关重要。该设备旨在解调经过频率调制（FM）调制的信号。FM是一种通过改变载波波的频率来编码信息的方法。频率调制接收器对于将这些信号转换回人类用户可以理解的格式（如音频或视频）至关重要。要理解频率调制接收器的重要性，我们必须首先了解FM是如何工作的。在频率调制中，载波信号的幅度保持不变，而其频率根据所发送的信息而变化。这种技术被广泛应用于广播，因为它提供了更好的音质，并且比幅度调制（AM）更不易受到噪声的影响。因此，FM电台能够提供更清晰的音频，使听众的体验更加愉悦。频率调制接收器在这一过程中起着至关重要的作用。当一个电台发送FM信号时，频率调制接收器接收信号的频率变化。它使用解调过程将频率的变化解码回原始音频信号。这是通过各种技术实现的，包括锁相环和解调器，这些技术有助于准确检索编码在FM信号中的信息。使用频率调制接收器的一个主要优点是它能够过滤噪声。由于FM信号不太受幅度波动的影响，接收器能够有效消除不必要的干扰，从而产生更清晰的输出。这一特性使得FM接收器在电磁干扰水平较高的环境中尤其受欢迎，例如城市地区。此外，现代频率调制接收器的技术也取得了显著进展。现代接收器通常配备数字信号处理（DSP）功能，允许更大的清晰度和同时处理多个信号的能力。这一进步使得听众能够享受多种电台，而不会遇到旧型号可能出现的静电和失真。除了传统的广播应用外，频率调制接收器还广泛应用于其他多个领域。例如，它们常用于电视广播，帮助解码传输信号的音频成分。此外，FM接收器还用于双向无线电，如紧急服务使用的无线电，确保在关键情况下可靠的通信。总之，频率调制接收器是现代通信系统中不可或缺的组成部分。它解调频率调制信号的能力使得音频和视频信息的清晰传输成为可能。随着技术的不断进步，我们可以期待频率调制接收器的功能和性能进一步改善，巩固其在未来通信技术中的地位。