【作者】 宋超俊；

【导师】 来逢昌；

【作者基本信息】 哈尔滨工业大学 ， 微电子学与固体电子学， 2009， 硕士

【摘要】 过去二十年来,电话、传真、电视和数据等信号传递的爆炸性需求推动了光纤通信的迅速发展,光纤通信以及与之相关的技术和工艺取得了革命性的进步,美国同步光网络(SONET)和国际同步数字体系(SDH)标准的建立为光纤通信系统的大规模研制和应用开辟的前进的道路。现在,2.5Gbps高速光纤通信系统已经在世界范围内进入大规模建设阶段,更高速率的系统的研制和应用也在开展之中。时钟数据恢复电路(CDR)正是光纤通信以及很多其他高速串行数据通信系统中不可缺少的关键电路,也是系统向更高速率提升的主要瓶颈。同时,CDR电路还要满足一系列苛刻的国际复用标准。本文介绍了一种使用0.18μm CMOS工艺实现的,用于SDH系统STM-16(2.5Gbps)标准的时钟数据恢复电路。首先介绍了光纤通信系统的基本概念以及常见的时钟数据恢复电路的结构和基本原理,然后介绍了一个带鉴频器(FD)辅助频率捕获的双环路锁相环时钟数据恢复电路的设计与仿真。从仿真结果来看,本设计电路可以稳定工作在2.5Gbps的速率下,并符合ITU-T国际标准中对STM-16级别的相关要求。更多还原

【Abstract】 In the past twenty years, the great demand of transmission of telephone, fax, television and data led to a rapid development of optical communication, optical communication and its technology achieved great progress. The recommendation from SONET and SDH standardized and accelerated the researches and applications of optical communication system. Nowadays, STM-16(2.5Gb/s) has began to construct extensively, and higher-speed system is being studied.The clock and data recovery(CDR) circuit is a key component in the optical communication system as well as many other high-speed serial data communication systems, and is the main bottleneck of systems’upgrading to higher speed. The CDR circuit is asked to meet a series of hard and fast standard given by the Synchronous Digital Hierarchy(SDH), which they called recommendation.This paper introduces a clock and data recovery circuit, which is realized in the standard 0.18μm CMOS technology, is used to work under the series STM-16(2.5Gbps) of SDH system. Above all, this paper introduces the basic conceptions of optical communication system, the fundamentals and topological structure of the CDR which is widely and soundly used recently. Then introduces a PLL based frequency acquisition aided dual-loop CDR circuit, the design and simulation results are presented.According to the simulation results, this CDR circuit can work on 2.5Gbps stably and meet the corresponding ITU-T recommendations.更多还原