Analysis and Prediction of Spurs in a Fractional-N Frequency Synthesizer with Discontinuous Nonlinearity

被引：0
|
作者：
Mazzaro, Valerio [1 ]
Gleeson, Luke [2 ]
Kennedy, Michael Peter [1 ]
机构：
[1] Univ Coll Dublin, Microelect Circuits Ctr Ireland, Dublin 4, Ireland
[2] Univ Coll Dublin, Sch Elect & Elect Engn, Dublin 4, Ireland
来源：
2020 31ST IRISH SIGNALS AND SYSTEMS CONFERENCE (ISSC) | 2020年
基金：
爱尔兰科学基金会;
关键词：
frequency synthesizer; fractional-N PLL; spur prediction; nonlinearity;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
The output phase noise of fractional-N frequency synthesizers shows spurious tones due to nonlinearities present in the system. Recently, Donnelly and Kennedy have provided a numerical method to predict the locations and amplitudes of the spurs. This has been tested and confirmed for charge pump (CP) PLLs with different types of continuous nonlinearities. This paper applies the method to cases where the nonlinearity is discontinuous. This type of nonlinearity can be considered as being representative of digital PLLs with quantization in the loop.
引用
收藏
页码：181 / 186
页数：6
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