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应用科学学报 ›› 2002, Vol. 20 ›› Issue (4): 396-398.

• 论文 • 上一篇    下一篇

Σ-Δ在数字小数分频器中的应用

张嗣忠   

  1. 东南大学国家专用集成电路系统工程技术研究中心, 江苏南京 210096
  • 收稿日期:2001-08-21 修回日期:2002-05-08 出版日期:2002-12-31 发布日期:2002-12-31
  • 作者简介:张嗣忠(1956-),男,浙江宁波人,工程师.

The Application of Sigma-Delta Modulator in Digit Fractional Divider

ZHANG Si-zhong   

  1. National ASIC System Engineering Research Center, Southeast University, Nanjing 210096, China
  • Received:2001-08-21 Revised:2002-05-08 Online:2002-12-31 Published:2002-12-31

PDF

59

被引次数

20

摘要： 分析了Σ-Δ对S/N的改善作用,将Σ-Δ在A/D中的应用引入到数字小数分频器中,简述了Σ-Δ对小数分频器输出相位抖动的改善,提出用单级Σ-Δ累加器复用取代多级累加器级联的概念.

关键词: 小数分频器, 累加器, 转换器, Σ-Δ

Abstract: This article analyses the improvement to S/N of Sigma-delta. It introduces the application of sigma-delta in A/D for digit fractional divider, and describes the improvement to output phase vibration in fractional divider due to the application of sigma-delta. The conception of replacing multiple accumulators with repeatedly cycled utilization of a sigma-delta accumulator is raised.

Key words: sigma-delta, fractional divider, accumulator, convertor

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