phase locked

简明释义

相位同步的

英英释义

例句

1.The two oscillators are now phase locked to maintain a constant frequency.

这两个振荡器现在已处于相位锁定状态，以保持恒定频率。

2.When the signals are phase locked, they can be combined without interference.

当信号处于相位锁定状态时，它们可以无干扰地组合。

3.In the communication system, the receiver uses a phase locked loop to synchronize with the transmitter.

在通信系统中，接收器使用相位锁定环路与发射器同步。

4.The phase locked loop helps in reducing jitter in the output signal.

相位锁定环路有助于减少输出信号中的抖动。

5.Engineers often use phase locked techniques in radar systems for improved accuracy.

工程师们常常在雷达系统中使用相位锁定技术以提高精度。

作文

In the realm of electronics and signal processing, the term phase locked refers to a condition where two or more signals are synchronized in phase. This concept is most commonly associated with phase-locked loops (PLLs), which are widely used in communication systems, frequency synthesis, and many other applications. Understanding how phase locked systems operate can provide valuable insights into their practical applications and benefits.A phase-locked loop is an electronic circuit that generates a signal that is phase-locked to a reference signal. The primary components of a PLL include a phase detector, a low-pass filter, and a voltage-controlled oscillator (VCO). The phase detector compares the phase of the input signal with the phase of the output signal from the VCO. When there is a phase difference, the phase detector produces an error signal that is sent to the low-pass filter. This filtered error signal adjusts the frequency of the VCO, bringing it into alignment with the input signal.The ability to achieve a phase locked condition is critical in various applications. For instance, in radio communications, maintaining synchronization between the transmitter and receiver is essential for clear signal transmission. A PLL can ensure that the local oscillator at the receiver is phase locked to the incoming signal, allowing for accurate demodulation and improved signal quality.Another significant application of phase locked systems is in clock recovery circuits. Digital communication systems often transmit data at high speeds, and the receiving end must accurately reconstruct the clock signal to sample the data correctly. By using a PLL, the receiver can lock onto the incoming data stream's timing, ensuring that it samples the data at the right moments. This phase locked technique is crucial for high-speed data transmission standards, such as Ethernet and USB.Moreover, phase locked loops are also employed in frequency synthesis. In many modern electronic devices, precise frequencies are necessary for various operations. A PLL can generate multiple frequencies from a single reference frequency by locking onto it and multiplying the frequency. This capability is particularly useful in synthesizers found in radios, televisions, and mobile phones, where multiple channels need to be accessed and maintained.The advantages of using phase locked systems are numerous. They provide excellent stability and accuracy, making them ideal for applications requiring precise frequency control. Additionally, PLLs can filter out noise from the input signal, resulting in cleaner output signals. Their versatility allows them to be used in diverse fields, from telecommunications to consumer electronics.However, designing a phase locked loop comes with its challenges. Engineers must carefully select the components and design parameters to ensure that the loop responds adequately to changes in the input signal without becoming unstable. Factors such as loop bandwidth and damping ratio play crucial roles in the performance of a PLL. If not properly designed, a PLL may experience issues like phase jitter or loss of lock, leading to degraded performance.In conclusion, the concept of phase locked systems is fundamental in modern electronics, providing synchronization and stability across various applications. Whether in communication systems, clock recovery circuits, or frequency synthesis, the ability to maintain a phase locked condition is vital for achieving high performance and reliability. As technology continues to advance, the importance of understanding and implementing phase locked systems will only grow, driving innovation across multiple industries.

在电子和信号处理领域，短语phase locked指的是两个或多个信号在相位上同步的状态。这个概念最常与锁相环（PLLs）相关联，锁相环广泛应用于通信系统、频率合成及许多其他应用。理解phase locked系统的工作原理可以为其实际应用和好处提供有价值的见解。锁相环是一种电子电路，生成一个与参考信号相位锁定的信号。PLL的主要组成部分包括相位检测器、低通滤波器和电压控制振荡器（VCO）。相位检测器比较输入信号的相位与来自VCO的输出信号的相位。当存在相位差时，相位检测器产生一个误差信号，并将其发送到低通滤波器。这个过滤后的误差信号调整VCO的频率，使其与输入信号对齐。实现phase locked条件的能力在各种应用中至关重要。例如，在无线电通信中，保持发射器和接收器之间的同步对于清晰的信号传输至关重要。PLL可以确保接收器的本地振荡器与输入信号phase locked，从而实现准确的解调和提高信号质量。另一个phase locked系统的重要应用是在时钟恢复电路中。数字通信系统通常以高速传输数据，接收端必须准确重建时钟信号，以便正确采样数据。通过使用PLL，接收器可以锁定到传入数据流的时序，从而确保在正确的时刻对数据进行采样。这种phase locked技术对于以太网和USB等高速数据传输标准至关重要。此外，锁相环还用于频率合成。在许多现代电子设备中，需要精确的频率来进行各种操作。PLL可以从单个参考频率生成多个频率，通过锁定到它并乘以频率。这种能力在收音机、电视和手机等合成器中尤为有用，因为需要访问和维护多个频道。使用phase locked系统的优点是众多的。它们提供了卓越的稳定性和准确性，使其成为需要精确频率控制的应用的理想选择。此外，PLLs可以过滤输入信号中的噪声，从而产生更干净的输出信号。它们的多功能性使其能够在从电信到消费电子等多个领域中使用。然而，设计phase locked环路也面临挑战。工程师必须仔细选择组件和设计参数，以确保环路对输入信号变化的响应适当，而不会变得不稳定。环路带宽和阻尼比等因素在PLL的性能中起着至关重要的作用。如果设计不当，PLL可能会遇到相位抖动或失锁等问题，从而导致性能下降。总之，phase locked系统的概念在现代电子学中是基础的，为各种应用提供同步和稳定性。无论是在通信系统、时钟恢复电路还是频率合成中，保持phase locked状态的能力对于实现高性能和可靠性至关重要。随着技术的不断发展，理解和实施phase locked系统的重要性只会增加，推动多个行业的创新。