phase lock

简明释义

相位同步

英英释义

例句

1.Using phase lock, we can reduce the phase noise in our system.

通过使用相位锁定，我们可以减少系统中的相位噪声。

2.In digital communications, phase lock is essential for synchronizing the transmitter and receiver.

在数字通信中，相位锁定对同步发射器和接收器至关重要。

3.The radio transmitter uses a technique called phase lock to ensure the signal remains stable.

无线电发射器使用一种称为相位锁定的技术，以确保信号保持稳定。

4.The phase lock loop is a critical component in maintaining signal integrity.

相位锁定环路是维护信号完整性的关键组件。

5.The engineer explained how phase lock can improve the accuracy of frequency generation.

工程师解释了如何通过相位锁定提高频率生成的准确性。

作文

In the realm of electronics and communication, the concept of phase lock plays a crucial role in ensuring the stability and accuracy of signals. The term phase lock refers to a technique used in phase-locked loops (PLLs), which are control systems that generate a signal that is in phase with a reference signal. This synchronization is vital for various applications, including radio transmission, clock recovery, and frequency synthesis.To understand the significance of phase lock, one must first grasp the basic principles of oscillation and phase. An oscillator generates a repetitive signal, typically in the form of a sine wave. The phase of this signal describes its position in time relative to a reference point. When two signals are said to be 'in phase,' they reach their peak values simultaneously, leading to constructive interference and a stronger combined signal.The phase lock mechanism operates by continuously adjusting the oscillator's frequency to match that of the reference signal. This adjustment is performed using feedback, where the output of the oscillator is compared to the reference signal. If there is a phase difference between the two signals, the system will modify the oscillator's frequency to eliminate this discrepancy. As a result, the output signal becomes locked in phase with the reference signal, hence the name phase lock.One of the most common applications of phase lock is in radio communications. In these systems, it is essential to maintain a stable carrier frequency to ensure clear transmission and reception of information. By employing a PLL, the transmitter can lock onto the frequency of the incoming signal, effectively filtering out noise and interference. This capability significantly enhances the quality of the received signal, making phase lock a vital component in modern communication systems.Another significant application of phase lock is in digital circuits, where precise timing is paramount. For instance, in synchronous digital systems, data is transmitted at specific intervals determined by a clock signal. If the clock signal drifts or becomes unstable, it can lead to data corruption or loss. By utilizing a PLL to achieve phase lock with the incoming data stream, the system can maintain accurate timing, ensuring reliable data transmission.Moreover, phase lock is also employed in frequency synthesis, where it is used to generate a range of frequencies from a single reference frequency. This technique is particularly useful in applications such as synthesizers and signal generators, where multiple frequency outputs are required. The ability to achieve phase lock allows for the creation of stable and precise frequencies, which are essential for various technological advancements.In conclusion, the concept of phase lock is integral to many modern electronic systems. Its ability to synchronize signals and maintain stability has made it an indispensable tool in fields such as telecommunications, digital circuitry, and frequency synthesis. As technology continues to evolve, the importance of phase lock will only grow, paving the way for more sophisticated and reliable electronic devices. Understanding and mastering this concept is crucial for anyone looking to excel in the field of electronics and communication engineering.

在电子和通信领域，相位锁定的概念在确保信号的稳定性和准确性方面发挥着至关重要的作用。相位锁定这个术语指的是一种用于锁相环（PLL）的技术，这是一种生成与参考信号同相的信号的控制系统。这种同步对于各种应用至关重要，包括无线电传输、时钟恢复和频率合成。要理解相位锁定的重要性，首先必须掌握振荡和相位的基本原理。振荡器生成重复的信号，通常呈正弦波形式。该信号的相位描述了其相对于参考点的时间位置。当两个信号被称为“同相”时，它们同时达到峰值，从而导致建设性干涉和更强的组合信号。相位锁定机制通过不断调整振荡器的频率以匹配参考信号的频率来运行。这一调整是通过反馈进行的，其中振荡器的输出与参考信号进行比较。如果两个信号之间存在相位差，系统将修改振荡器的频率以消除这种差异。因此，输出信号与参考信号的相位保持锁定，因此得名相位锁定。相位锁定最常见的应用之一是在无线电通信中。在这些系统中，保持稳定的载波频率对于确保信息的清晰传输和接收至关重要。通过采用PLL，发射机可以锁定到传入信号的频率，有效地过滤噪声和干扰。这种能力显著增强了接收信号的质量，使得相位锁定成为现代通信系统中的重要组成部分。相位锁定的另一个重要应用是在数字电路中，在这些电路中，精确的时序至关重要。例如，在同步数字系统中，数据在由时钟信号确定的特定间隔内传输。如果时钟信号漂移或变得不稳定，可能导致数据损坏或丢失。通过利用PLL与传入数据流实现相位锁定，系统可以保持准确的时序，确保可靠的数据传输。此外，相位锁定还用于频率合成，通过它可以从单个参考频率生成一系列频率。这一技术在合成器和信号发生器等应用中尤其有用，这些应用需要多个频率输出。实现相位锁定的能力允许生成稳定且精确的频率，这对各种技术进步至关重要。总之，相位锁定的概念是许多现代电子系统不可或缺的一部分。它同步信号和保持稳定性的能力使其成为电信、数字电路和频率合成等领域的重要工具。随着技术的不断发展，相位锁定的重要性只会增加，为更复杂和可靠的电子设备铺平道路。理解和掌握这一概念对于任何希望在电子和通信工程领域取得成功的人来说都是至关重要的。