低功耗CMOS差分环形压控振荡器设计  

A Design of Low Power Consumption Differential Voltage-Controlled Ring Oscillator

作　　者：谢连波[1] 桑红石[1] 方海涛[1] 朱海博[1] 高伟[1] 

机构地区：[1]华中科技大学图像识别与人工智能研究所,湖北武汉430074

出　　处：《微电子学与计算机》2013年第5期104-107,共4页Microelectronics & Computer

基　　金：教育部支撑项目(625010107)

摘　　要：提出了一个基于0.18μm标准CMOS工艺实现的四级差分环形压控振荡器.全差分环形压控振荡器采用带对称负载的差分延时单元.仿真结果表明,压控振荡器的频率范围在最坏情况为0.21～1.18GHz;偏离中心频率10MHz情况下,压控振荡器的相位噪声为-118.13dB/Hz;1.8V电源电压下,中心频率为600MHz时,压控振荡器的功耗仅有4.16mW;版图面积约为0.006mm2,可应用于锁相环和频率综合器设计中.A 4--stage differential voltage--controlled ring oscillator base on 0. 18μm standard CMOS technology is proposed in this paper. This full differential voltage--controlled ring oscillator adopted differential delay cell with symmetric load. Simulation results of the oscillator show that the tuning frequency rang from 0. 21 to 1.18GHz at worst case, the phase noise of this oscillator is lower than --118. 13dBc/Hz at 10MHz offset frequency, the power consumption of this oscillator is only 4. 16mW at central frequency is 600MHz with 1.8V power supply, and the layout area of the oscillator is only 0. 006mm2. Therefore, this differential voltage-- controlled ring oscillator is applicable for phase--locked Loop and frequency synthesis.

关 键 词：低功耗 CMOS差分环形压控振荡器 锁相环 相位噪声 

分 类 号：TN752[电子电信—电路与系统]