Title :
Distortion in Current Commutating Passive CMOS Downconversion Mixers
Author :
Khatri, Himanshu ; Gudem, Prasad S. ; Larson, Lawrence E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of California at San Diego, La Jolla, CA, USA
Abstract :
CMOS passive mixer linearity is analyzed using a Volterra-series analysis and closed-form expressions for IIP2, two-tone IIP3, and cross-modulation IIP3 are presented, exhibiting dependence upon the mixer source and load impedances. Design guidelines are suggested for improving the mixer linearity performance. Accurate expressions are presented for the input impedance of an ideal passive mixer with an arbitrary load impedance. The calculations are in close agreement with the measured results and the simulated response.
Keywords :
CMOS integrated circuits; Volterra series; intermodulation distortion; mixers (circuits); CMOS downconversion mixers; CMOS passive mixer; Volterra-series analysis; current commutating mixers; intermodulation distortion; load impedance; mixer linearity; Analog integrated circuits (ICs); CMOS passive mixer; Volterra series analysis; current commutating mixer; intermodulation distortion; passive mixer nonlinearity;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2009.2031930
