高性能数控振荡器的设计  

Design of a High Performance Digital Controlled Oscillator

作　　者：谢荣岳[1] 邓小莺[2] 郝大为[1] 张景义[1] 周晓[1] 

机构地区：[1]武汉军械士官学校,湖北省武汉市430075 [2]东南大学国家专用集成电路系统工程技术研究中心,江苏省南京市210096

出　　处：《电子工程师》2008年第2期39-41,49,共4页Electronic Engineer

摘　　要：设计了一个低抖动、高分辨率的DCO(数控振荡器)。该DCO由7级单端倒相器构成,通过分析输出时钟抖动、分辨率与每级倒相器尺寸之间的关系,找到设计的最佳尺寸,最终实现版图。采用0.35μm1P4M CMOS工艺,3.3 V电源供电,振荡频率为280 MHz^550 MHz,分辨率为10 ps。Hspicerf仿真结果表明,DCO输出时钟为385 MHz时,峰-峰值抖动为70.35 ps。This paper introduces a DCO （Digital-Controlled Oscillator） with low jitter and high resolution.The DCO is composed of 7 single-ended inverters, whose suitable sizes are obtained based on the analysis of the relationship between the jitter or resolution of the clock and the size of the inverters, and at last the layout is achieved. Implemented in a SMIC 0.35μm 1 P4M CMOS process with 3.3 V power supply voltage, the DCO can operate from 280 MHz to 550 MHz and its resolution is 10 ps. According to Hspicerf simulation re- suits, the peak-to-peak jitter is 70.35 ps when the output frequency is 385 MHz.

关 键 词：数控振荡器 锁相环 抖动 

分 类 号：TN752[电子电信—电路与系统]