A wideband current-commutating passive mixer for multi-standard receivers in a 0.18μm CMOS  

作　　者：包宽 樊祥宁 李伟 王志功 

机构地区：[1]Institute of RF-&OE-ICs,School of Information Science and Engineering,Southeast University

出　　处：《Journal of Semiconductors》2013年第1期74-82,共9页半导体学报（英文版）

基　　金：Project supported by the National Science and Technology Major Project (No.2010ZX03007-002-01);the State Key Development Program for Basic Research of China (No.2010CB327404)

摘　　要：This paper reports a wideband passive mixer for direct conversion multi-standard receivers.A brief comparison between current-commutating passive mixers and active mixers is presented.The effect of source and load impedance on the linearity of a mixer is analyzed.Specially,the impact of the input impedance of the transimpedance amplifier（TIA）,which acts as the load impedance of a mixer,is investigated in detail.The analysis is verified by a passive mixer implemented with 0.18 μm CMOS technology.The circuit is inductorless and can operate over a broad frequency range.On wafer measurements show that,with radio frequency（RF） ranges from 700 MHz to 2.3 GHz,the mixer achieves 21 dB of conversion voltage gain with a-1 dB intermediate frequency（IF） bandwidth of 10 MHz.The measured IIP3 is 9 dBm and the measured double-sideband noise figure（NF） is 10.6 dB at 10 MHz output.The chip occupies an area of 0.19 mm2 and drains a current of 5.5 mA from a 1.8 V supply.This paper reports a wideband passive mixer for direct conversion multi-standard receivers.A brief comparison between current-commutating passive mixers and active mixers is presented.The effect of source and load impedance on the linearity of a mixer is analyzed.Specially,the impact of the input impedance of the transimpedance amplifier（TIA）,which acts as the load impedance of a mixer,is investigated in detail.The analysis is verified by a passive mixer implemented with 0.18 μm CMOS technology.The circuit is inductorless and can operate over a broad frequency range.On wafer measurements show that,with radio frequency（RF） ranges from 700 MHz to 2.3 GHz,the mixer achieves 21 dB of conversion voltage gain with a-1 dB intermediate frequency（IF） bandwidth of 10 MHz.The measured IIP3 is 9 dBm and the measured double-sideband noise figure（NF） is 10.6 dB at 10 MHz output.The chip occupies an area of 0.19 mm2 and drains a current of 5.5 mA from a 1.8 V supply.

关 键 词：CMOS current-commutating passive mixer LINEARITY source and load impedance multi-standard receiver WIDEBAND 

分 类 号：TN773[电子电信—电路与系统] TN912.3