摘要: |
千兆以太网收发器模拟前端的时钟恢复电路要求锁相环(PLL)能够提供"128相"等相位差的时钟信号.为了满足此要求,设计了一种相位插值电路,它在不增加四级VCO级数的基础上,对其输出时钟的相邻相位进行16插值.仿真结果表明,该插值电路使PLL的输出时钟相位从8相增加至128相,证明了电路的有效性. |
关键词: 以太网 收发器 时钟恢复电路 锁相环 相位插值 压控振荡器 |
DOI:10.3969/j.issn.1001-893X. |
投稿时间:2006-07-19修订日期:2006-12-05 |
基金项目:国家自然科学基金
,
上海市科委资助项目
,
上海-应用材料研究与发展项目 |
|
Design and Realization of a Clock Phase Interpolator Circuit Based on PLL |
|
() |
Abstract: |
The timing recovery circuit in the analog part of 1000 Base -T Ethernet transceiver requires that the utilized PLL could provide 128 -phase clock signals within a single period. For meeting this demand, this paper presents a phase interpolator circuit which interpolates the two adjacent clock phases with a number of 16 while not changing the 4 levels of VCO. Simulation results show the effectiveness of this circuit which increases the output clock phases of the PLL from 8 to 128. |
Key words: ethernet transceiver timing recovery circuit PLL phase interpolator VCO |