一种适应PVT偏差的4GHz双重反馈环形振荡器  

A4 GHz Ring Oscillator Based on Dual-Feedback Loops with PVT Deviation Adaptation

作　　者：黄冲[1] 陆平[1] 李宁[1] 叶凡[1] 任俊彦[1] 郑增钰[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室,上海201203

出　　处：《复旦学报（自然科学版）》2007年第1期70-75,共6页Journal of Fudan University：Natural Science

摘　　要：在分析传统环形振荡器的基础上,设计了一种新型高频、低噪声环形振荡器.采用改进的全开关状态的延时单元和双重反馈环结构,克服了传统环形振荡器振荡频率低、噪声性能差的缺点,可以有效抑制PVT(Pro-cess Voltage Temperature)偏差对频率的影响.采用TSMC0.18μm CMOS工艺参数,电源电压1.8V,功耗为37.5mW.仿真得到在振荡器中心频率为4GHz时的单边带相位噪声为95.6dBc/[e-mail] on the analysis of traditional ring-oscillators, a high frequency ring oscillator of low phase noise is designed with improved structure to suppress deviation of PVT（ Process Voltage Temperature）. Improved full switching delay cells and dual-feedback loops are adopted to overcome the drawback of traditional CMO6 ring oscillator of low frequency and poor noise performance. The design is based on the 0.18 μm CMOS model of TSMC. Power consumption of the circuit is 37.5 mW of supply voltage of 1.8 V. Simulations show the phase noise of a four-stage design is 95.6 dBc/Hz at 1 MHz offset from a 4 GHz center frequency.

关 键 词：CMOS集成电路 环形振荡器 相位噪声 频率综合器 

分 类 号：TN492[电子电信—微电子学与固体电子学]