A direct-conversion mixer with DC-offset cancellation for IEEE 802.11a WLAN receiver

Author

Xu, Qiming ; Hu, Xueqing ; Gao, Peng ; Yan, Jun ; Yin, Shi ; Dai, Foster F. ; Jaeser, R.C.

Author_Institution

Inst. of Semicond., Chinese Acad. of Sci., Beijing

fYear

2006

fDate

21-24 May 2006

Abstract

A DC-offset cancellation scheme in the 5 GHz direct-conversion receiver compliant with IEEE 802.11a wireless LAN standard is described in this paper. It uses the analog feedback loop to eliminate the DC-offset at the output of the double-balanced mixer. The mixer has a simulation voltage conversion gain of 13 dB at 5.2 GHz, noise figure of 9.67 dB, IIP3 of 7.6dBm. The solution provides 39.1 dB reduction according to the leakage value at LO and mixer load resistors, the additional noise figure added to mixer is less than 0.9 dB, the added power dissipation is 0.1 mW and was fabricated in 60 GHz 0.35 mum SiGe BiCMOS technology

Keywords

BiCMOS integrated circuits; Ge-Si alloys; IEEE standards; millimetre wave mixers; millimetre wave receivers; wireless LAN; 0.1 mW; 0.35 micron; 13 dB; 5 GHz; 5.2 GHz; 60 GHz; 9.67 dB; DC-offset cancellation; IEEE 802.11a; SiGe; SiGe BiCMOS technology; WLAN receiver; analog feedback loop; direct-conversion mixer; direct-conversion receiver; double-balanced mixer; mixer load resistors; BiCMOS integrated circuits; Feedback loop; Gain; Germanium silicon alloys; Noise figure; Power dissipation; Resistors; Silicon germanium; Voltage; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on

Conference_Location

Island of Kos

Print_ISBN

0-7803-9389-9

Type

conf

DOI

10.1109/ISCAS.2006.1693928

Filename

1693928