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应用科学学报 ›› 2005, Vol. 23 ›› Issue (2): 169-173.

• 论文 • 上一篇    下一篇

MOSFET输出阻抗对混频器线性度影响分析

唐守龙, 罗岚, 陆生礼   

  1. 东南大学国家专用集成电路系统工程技术研究中心, 江苏南京 210096
  • 收稿日期:2003-11-07 修回日期:2004-02-19 出版日期:2005-03-31 发布日期:2005-03-31
  • 作者简介:唐守龙(1979-),男,山东邹城人,博士生,E-mail:sunwiss@seu.edu.cn

The Effect of MOSFET Output Impedance on Linearity in the CMOS Gilbert Mixer

TANG Shou-long, LUO Lan, LU Sheng-li   

  1. National ASIC System Engineering Research Center, Southeast University, Nanjing 210096, China
  • Received:2003-11-07 Revised:2004-02-19 Online:2005-03-31 Published:2005-03-31

PDF

120

被引次数

11

摘要： 深入研究了MOSFET输出阻抗对Gilbert混频器线性度的影响,建立了针对MOSFET输出阻抗的混频器非线性模型,得出了Gilbert混频器线性度最优偏置条件.基于0.25μm CMOS工艺的Gilbert混频器验证结果表明,预测得到的线性度最优理论偏置值与验证结果之间的误差小于10%.

关键词: CMOS射频集成电路, 混频器, MOSFET输出阻抗, 线性度

Abstract: The nonlinearity behavior of the CMOS Gilbert mixer is investigated.The impact of MOSFET output impedance on distortion is studied in depth.The mixer nonlinear model and optimal drain-to-source voltage bias are presented in this paper.The rate of error between the analytical predictions and the Cadence SpectreRF circuit simulation results is less than 10%.

Key words: mixer, CMOS RF IC, linearity, MOSFET output impedance

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