Analysis of Phase Noise Spectrum in LC Oscillator based on Nonlinear Method

摘要：

A novel nonlinear model of LC oscillator is presented which is based on electrical parameters of circuit. In view of the operation condition of device in steady-state oscillation, we discuss the physical process that transforms device noise in transistors or resistors into phase noise by nonlinear spectrum conversion and linear spectrum shaping. A closed-form expression is derived for the output phase noise spectrum. This model is validated by simulation of a 2.9GHz Colpitts oscillator using ADS. Theoretical analysis and simulation shows that phase noise performance in LC oscillator can be improved by diminishing the feedback factor.

关键词： LC oscillator, phase noise, nonlinear model, spectrum conversion feedback factor

作者: ZhiPeng Li Jingfu Bao Puying Tang Fei Wang

作者单位: School of Electronic Engineering, University of Electronic Science and Technology of China Chengdu, 611731, China

会议类型: 国际会议

会议名称: 2010 International Conference on Microwave and Millimeter Wave Technology(2010国际微波与毫米波技术会议 ICMMT2010)

会议地点: 成都

会议语种:英文

页码: 649-652

在线出版日期: 2010-05-08（万方平台首次上网日期，不代表论文的发表时间）