Title :
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
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;
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
DOI :
10.1109/COMCAS.2011.6105808
