Title :
A SiGe down-conversion micromixer for wideband-CDMA application
Author :
Lee, Sung-Huang ; Tsai, Chih-Yu ; Chiou, Hwann-Kaeo
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Chung-li, Taiwan
fDate :
30 Nov.-2 Dec. 2005
Abstract :
This paper presents a micromixer for WCDMA applications with no external balun requirement. The transconverter cells are applied both to LO and RF port to replace the required baluns for converting the single-ended signal to differential output. Besides providing the function of balun, the transconverter cell also improves the linearity behavior. This benefits the RF input stage especially. This micromixer is realized in 0.35 um SiGe BiCMOS technology. The measured input P1 dB is -12 dBm and IIP3 is 2 dBm. The measured isolations of LO port are all higher than 35 dB. The current consumption of mixer core is about 3.5 mA.
Keywords :
BiCMOS integrated circuits; baluns; broadband networks; code division multiple access; germanium alloys; microwave mixers; mobile radio; silicon alloys; BiCMOS technology; SiGe; WCDMA applications; down-conversion micromixer; external balun requirement; transconverter cells; wideband-CDMA application; Costs; Data communication; Degradation; Germanium silicon alloys; Impedance matching; Linearity; Multiaccess communication; Radio frequency; Silicon germanium; Wideband;
Conference_Titel :
Radio-Frequency Integration Technology: Integrated Circuits for Wideband Communication and Wireless Sensor Networks, 2005. Proceedings. 2005 IEEE International Workshop on
Print_ISBN :
0-7803-9372-4
DOI :
10.1109/RFIT.2005.1598901
