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.
出处
《微电子学与计算机》
CSCD
北大核心
2013年第5期104-107,共4页
Microelectronics & Computer
基金
教育部支撑项目(625010107)