A Direct-Conversion Mixer with a DC-offset Cancellation for WLAN

Author

Xu, Q. ; Hu, X. ; Jan, Y. ; Shi, Y. ; Dai, F.F. ; Jaeger, R.C.

Author_Institution

Chinese Acad. of Sci., Beijing

fYear

2007

fDate

Sept. 30 2007-Oct. 2 2007

Firstpage

13

Lastpage

16

Abstract

This paper presents a 5GHz double-balanced mixer with DC-offset cancellation circuit for direct-conversion receiver compliant with IEEE 802.11a wireless LAN standard. The analog feedback loop is used, to eliminate the DC-offset at the output of the double-balanced mixer. The test results show that the mixer with DC-offset cancellation circuit has voltage conversion gain of 9.5dB at 5.15GHz, noise figure of 13.5dB, IIP3 of 7.6 dBm, 1.73mV DC-offset voltage and 67mW power with 3.3-V power supply. The DC-offset cancellation circuit has less than 0.1mm² additional area and 0.3mW added power dissipation. The direct conversion WLAN receiver has been implemented in a 0.35mum SiGe BiCMOS technology.

Keywords

mixers (circuits); wireless LAN; DC-offset cancellation circuit; IEEE 802.11a wireless LAN standard; WLAN; analog feedback loop; direct-conversion mixer; direct-conversion receiver; double-balanced mixer; frequency 5 GHz; BiCMOS integrated circuits; Circuit testing; Feedback loop; Germanium silicon alloys; Noise figure; Power dissipation; Power supplies; Silicon germanium; Voltage; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Bipolar/BiCMOS Circuits and Technology Meeting, 2007. BCTM '07. IEEE

Conference_Location

Boston, MA

ISSN

1088-9299

Print_ISBN

978-1-4244-1019-4

Electronic_ISBN

1088-9299

Type

conf

DOI

10.1109/BIPOL.2007.4351828

Filename

4351828