Noise and Intermodulation Mechanisms in CMOS Downconverters

摘要：

A noise and intermodulation distortion (IMD) analysis of CMOS downconverters, such as the widely used CMOS Gilbert cell, is presented. A qualitative physical model has been developed to explain the mechanisms responsible for noise and IMD in mixers. The contribution of all internal noise source and IMD to the output current is calculated through simple equations. The accuracy of the predictions about theory results are validated via comparing with simulation results, and the dependence of mixer noise and IMD on local oscillator (LO) amplitude and other circuit parameters are.

关键词： Active Mixers direct-conversion flicker noise JIP2 IIP3 low IF receivers Second-order distorsion self- mixing Third-order distorsion white noise.

作者: Songting Li Jiancheng Li Xiaochen Gu Zhaowen Zhuang Hongyi Wang

作者单位: School of electronic science and engineering, National University of Defense Technology, Changsha, 410073, China

会议类型: 国际会议

会议名称: 2012 International Conference on Measurement,Information and Control(2012测量、信息与控制国际会议 ICMIC2012)

会议地点: 哈尔滨

会议语种:英文

页码: 841-852

在线出版日期: 2012-05-18（万方平台首次上网日期，不代表论文的发表时间）