用于分数氮合成的数字/spl Sigma//spl Delta/调制器的比较研究

ICECS 2001. 8th IEEE International Conference on Electronics, Circuits and Systems (Cat. No.01EX483) Pub Date : 2001-09-02 DOI:10.1109/ICECS.2001.957474

Keliu Shu, E. Sánchez-Sinencio, F. Maloberti, U. Eduri

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引用次数: 25

摘要

本文研究了用于分数n频率合成的数字/spl Sigma//spl Delta/调制器(SDM)的设计。提出了设计注意事项。讨论了数字/spl Sigma//spl Delta/调制器与模拟调制器相比的特性。给出了4种数字sdm的仿真结果。详细讨论了每种拓扑的优缺点。通过比较研究，给出了用于分数n合成器的数字SDMs的设计准则。

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A comparative study of digital /spl Sigma//spl Delta/ modulators for fractional-N synthesis

This paper investigates the design of digital /spl Sigma//spl Delta/ modulator (SDM) for fractional-N frequency synthesis. The design considerations are presented. Characteristics of digital /spl Sigma//spl Delta/ modulators compared with their analog counterparts are addressed. Simulation results of 4 types of digital SDMs are presented. The pros and cons of each topology are discussed in detail. Design guidelines of digital SDMs for fractional-N synthesizers are given by this comparative study.

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ICECS 2001. 8th IEEE International Conference on Electronics, Circuits and Systems (Cat. No.01EX483)

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