A Common Gate Mizer with Transconductance Nonlinearity Cancellation

摘要：

A highly linear Common Gate (CG) mixer is designed using transconductance linearization technique combined with elimination of harmonic feedback effect. One of the major contributors of third order nonlinearity in the mixer is the second derivative of transconductor (gm). The Multiple Gated Transistor (MGTR) technique is employed in the transconductor of CG mixer to linearize the mixer. Also,an RF current source is used to remove harmonic feedback components which limit IIP3 enhancement.With CG MGTR transconductor,a LC folded cascode current commutating mixer is proposed. The proposed CG mixer for 900MHz CDMA application is designed with 0.13μm CMOS technology. Simulation result shows that conversion gain of 7dB NF of 15dB and IIP3 of 20dBm while consuming 5.4mA at 1.2 V supply.Compared with conventional design,the proposed one shows 10dB IIP3 improvement.

关键词： Mizer CMOS Linearity Common Gate mizer

作者: Tae Wook Kim

作者单位: School of Electronic and Electrical Engineering,Yonsei University,Seoul,Korea

会议类型: 国际会议

会议名称: 2009 IEEE 8th International Conference on ASIC(第八届IEEE国际专用集成电路大会)

会议地点: 长沙

会议语种:英文

页码: 458-460

在线出版日期: 2009-10-20（万方平台首次上网日期，不代表论文的发表时间）