Title :
A High Linearity CMOS Micromixer for UWB Systems
Author :
Lin, Shui-Yang ; Xiao-Wei Sun ; Yang, Li-wu
Author_Institution :
RF & Microwave Lab., Inst. of Microsyst. & Inf. Technol., Shanghai
Abstract :
A CMOS micromixer for 3-5 GHz UWB receivers is developed in this paper, which employs a modified class-AB input stage so as to achieve high linearity and 50 Omega input matching with single-ended to differential conversion. A LO buffer and an output buffer are integrated in it for on-wafer testing. Our measurement results show that, with a 50 Omega output loaded, it can achieve 5 dB gain in power conversion, 12.5 dB SSB NF, and 4 dBm IIP3. The mixer-core consumes 2.6 mA of current from 1.8 V power supply, and the on-chip area occupied 2 by this mixer with pads excluded is only about 350times400 mum2.
Keywords :
CMOS integrated circuits; mixers (circuits); ultra wideband communication; CMOS micromixer; LO buffer; UWB receivers; current 2.6 mA; differential conversion; frequency 3 GHz to 5 GHz; gain 12.5 dB; gain 5 dB; on-wafer testing; output buffer; resistance 50 ohm; voltage 1.8 V; CMOS technology; Gain measurement; Impedance matching; Information technology; Linearity; Mixers; Power measurement; Radio frequency; Testing; Ultra wideband technology; CMOS mixer; single-ended to differential; ultra-wideband applications;
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
DOI :
10.1109/APMC.2007.4554773
