A 4.2–6.2 GHz low-power CMOS mixer core with DC offset correction for RF-MIMO WLAN

Author

Wickert, Michael ; Ellinger, Frank

Author_Institution

Dept. of Circuit Design & Network Theor., Dresden Univ. of Technol., Dresden, Germany

fYear

2011

fDate

7-9 Nov. 2011

Firstpage

1

Lastpage

4

Abstract

The exploitation of multiple-input multiple-output (MIMO) benefits in the radio frequency (RF) domain adds special restrictions to the mixer design. This paper proposes a passive mixer core, which can be employed for both conversion directions in wireless local area network (WLAN) transceiver integrated circuits (ICs). Because in highly integrated direct conversion receivers an unknown level of self-mixing can occur, a method for regulating the DC-offset and common mode of the differential outputs is incorporated. Fabricated in 0.25 μm CMOS the mixer core consumes only 0.056mm² in area. The measurement results of this 4.15 to 6.2 GHz direct conversion mixer prove excellent linearity OIP3 of +4.9 dBV, high voltage conversion gain +0.8 dB at an LO power of 5 dBm and a low power consumption of 11 mW at 2.5 V.

Keywords

CMOS integrated circuits; MIMO communication; MMIC mixers; field effect MMIC; integrated circuit design; low-power electronics; passive networks; radio transceivers; wireless LAN; DC offset correction; DC-offset regulation; RF-MIMO WLAN; WLAN transceiver integrated circuits; differential outputs; direct conversion receivers; frequency 4.2 GHz to 6.2 GHz; high voltage conversion gain; low-power CMOS mixer core design; multiple-input multiple-output WLAN; passive mixer core; radiofrequency domain; size 0.25 mum; voltage 2.5 V; wireless local area network; Baseband; CMOS integrated circuits; Gain; Mixers; Radio frequency; Switches; Switching circuits; CMOS; Mixer; Self Mixing; WLAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwaves, Communications, Antennas and Electronics Systems (COMCAS), 2011 IEEE International Conference on

Conference_Location

Tel Aviv

Print_ISBN

978-1-4577-1692-8

Type

conf

DOI

10.1109/COMCAS.2011.6105808

Filename

6105808