1. 意义和用法
PLL是Phase Locked Loop的缩写，中文常译为“锁相环”，是一种电路系统，用来在输入信号和参考信号之间建立精确的相位关系。PLL主要用于时钟同步、调频调相、频率合成等领域。在通信，音视频处理和数字时钟等方面有广泛的应用。
2. 相关概念
PLL还涉及到许多相关概念，比如锁频范围（lock range）、锁相范围（capture range）、锁相时间（lock time）、分频器（divider）等。
3. 发展历史
PLL最早是由法国电子工程师Jean Baptiste Joseph Fourier于xx年提出的概念，但是直到20世纪xx年代才得到了广泛应用和发展。
示例句：
1. The PLL in this device is capable of locking onto frequencies up to 2 GHz.
这个设备中的PLL可以锁定高达2 GHz的频率。
2. The PLL is widely used in digital audio and video processing.
PLL在数字音视频处理中得到了广泛的应用。
3. The design of a high-performance PLL requires a deep understanding of the underlying principles and related technologies.
要设计一个高性能的PLL需要深入理解相关原理和技术。
4. The capture range of the PLL must be large enough to account for any frequency drift in the input signal.
PLL的捕获范围必须足够大，以补偿输入信号的任何频率漂移。
5. The PLL can also be used for frequency synthesis in radio systems.
PLL也可用于无线电系统中的频率合成。
pll的中文翻译是相位锁定环路，读音为“P-L-L”。
例句：
1. PLL技术可以用来抑制干扰信号。
2. 这款产品采用PLL电路，可以同步输出高质量信号。
Translation:
The Chinese translation of 'pll' is 相位锁定环路, pronounced as "P-L-L".
Examples:
1. PLL technology can be used to suppress interference signals.
2. This product uses a PLL circuit and can output high-quality signals with synchronization.
pll的中文解释是"锁相环、最后一层的排列"，还经常被翻译为视眼球剥璃，在线发音：[pll]，pll在英语中经常以名词形式出现，在《郎文当代高级英语辞典》中，共找到12个与pll相关的例句。
Pll的词典翻译
1.锁相环
例句:I told you not to file the PIL, but you ignored me. (我叫你别提起诉讼，你不听我的 I told you not to file the PLL, but you ignored me.)
2.最后一层的排列
例句:In order to minimize the PLL jitter, it is recommended to avoid active signal on the TEST output. (为了尽量减少抖动的锁相环，建议，以避免在测试输出的积极信号。)
3.视眼球剥璃
例句:Aim To compare the effects of liposome and glyco-poly-L-lysine (G-PLL) on target uptake and gene expression of liver by intravenous injection. (目的比较脂质体和糖化多聚赖氨酸对目的基因肝脏靶向定位效果的影响。)
用法及短语
pll一般作为名词使用，如在fm pll demodulator(调频锁相回路解调变器)、PLL frequency modulator([电子] 锁相环调频器)等常见短语中出现较多。
| fm pll demodulator | 调频锁相回路解调变器 |
| PLL frequency modulator | [电子] 锁相环调频器 |
例句
1. Aim To compare the effects of liposome and glyco-poly-L-lysine (G-PLL) on target uptake and gene expression of liver by intravenous injection. (翻译:目的比较脂质体和糖化多聚赖氨酸对目的基因肝脏靶向定位效果的影响。)
2. The gappy clock is recovered by the PLL. (翻译:利用锁相环完成了码速恢复。)
3. So... in PIL number 48693... the trial, State versus Rahul Dewan. (翻译:所以 So. 第48693号诉讼 根据相关法律条文 in PLL number 48693. the trial, State versus Rahul Dewan.)
4. Analyzing the basic theory and development of PLL, and studying the design theory and impedance match problem of experimental circuit board. (翻译:分析了锁相环的基本原理和实现，并对射频电路设计理论和阻抗匹配问题进行了探究。)
5. You think this PlL will make you a great advocate. (翻译:你觉得这个诉讼 会让你一举成名 You think this PLL will make you a great advocate.)
6. In order to indentify the validity of the designing and simulation technique deeply, a S band PLL frequency synthesizer was designed. (翻译:为验证设计和仿真方法的正确性，本文最后设计了一个S波段锁相环频率合成器。)
7. When I heard that you have filed a pil, I mustered some courage. (翻译:然后我听说你提起了诉讼 我更加有勇气了 When I heard that you have filed a PLL, I mustered some courage.)
8. A switched varactor array is proposed to suppress tuning gain fluctuation for the performance of the phase locked loop (PLL). (翻译:该振荡器包含了一个开关可变电容阵列，用以抑制调谐增益的变化。)
9. Based on noncoherent DLL and arctan carrier PLL, the curves of tracking errors in general forms are given after a series of computing and simulation. (翻译:基于非相关早减迟延时锁定环和反正切载波跟踪环，得出了由一般形式的误差解析表达式导出的码相和载波相位跟踪误差曲线。)
10. Why did you file this PIL? (翻译:你为什么会提起这个诉讼 Why did you file this PLL.)
11. It was only after the pil was filed that... new facts, new evidence, new eye witnesses emerged. (翻译:他提起了诉讼后 It was only after the PLL was filed that. 这个案子出现了新的事实 新的证据 新的证人 new facts, new evidence, new eye witnesses emerged.)
12. However, process mismatches and other factors can cause a small phase difference between the phase of RCLK and the phase of FCLK even when PLL 100 is lock mode. (翻译:然而，即使PLL 100处于锁定模式，过程失配和其他因素也可能引起RCLK相位和FCLK相位之间小的相位差。)
13. You have filed a pil in the Rahul Dewan case? (翻译:是你对拉胡儿·迪万的案子提起了诉讼吗 You have fiIed a PLL in the Rahul Dewan case.)
14. The main aim of this work is to research the fractional-N PLL in the CMMB application and the realization of the high performance PFD and CP of the PLL. (翻译:本文主要研究CMMB系统应用的小数分频PLL以及系统中高性能的鉴频鉴相器和电荷泵的实现。)
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