丁坝
控制理论(社会学)
锁相环
噪音(视频)
非线性系统
相位噪声
通带
控制器(灌溉)
循环(图论)
振幅
计算机科学
物理
工程类
电子工程
数学
光学
带通滤波器
结构工程
图像(数学)
人工智能
组合数学
生物
量子力学
控制(管理)
农学
作者
Yann Donnelly,Michael Peter Kennedy
出处
期刊:IEEE Transactions on Circuits and Systems I-regular Papers
[Institute of Electrical and Electronics Engineers]
日期:2019-11-01
卷期号:66 (11): 4108-4121
被引量:23
标识
DOI:10.1109/tcsi.2019.2925181
摘要
Integer boundary spurs appear in the passband of the loop response of fractional-N phase lock loops and are, therefore, a potentially significant component of the phase noise. In spite of measures guaranteeing spur-free modulator outputs, the interaction of the modulation noise from a divider controller with inevitable loop nonlinearities produces such spurs. This paper presents analytical predictions of the locations and amplitudes of the spurs and accompanying noise floor levels produced by interaction between a divider controller output and a PLL loop with a static nonlinearity. A key finding is that the spur locations and amplitudes can be estimated by using only the knowledge of the structure and pdf of the accumulated modulator noise and the nonlinearity. These predictions also offer new insights into why the spurs appear.
科研通智能强力驱动
Strongly Powered by AbleSci AI