DocumentCode
2570038
Title
Active 2nd-order intermodulation calibration for direct-conversion receivers
Author
Chen, Minghui ; Wu, Yue ; Chang, M. Frank
Author_Institution
California Univ., Los Angeles, CA
fYear
2006
fDate
6-9 Feb. 2006
Firstpage
1830
Lastpage
1839
Abstract
A temperature-compensated active IM2 calibration circuit for direct-conversion receivers is fabricated with a mixer in 0.25mum CMOS. A squaring circuit senses the RF signal and generates a calibration current to cancel mixer IM2 distortion. The loading effect and noise contribution are minimized by gain boosting. IIP2 is boosted >20dB to >80dBm in the IMT band. The calibration circuit draws 1.5mA
Keywords
CMOS integrated circuits; intermodulation distortion; mixers (circuits); radio receivers; 0.25 micron; 1.5 mA; CMOS process; RF signal; active IM2 calibration circuit; active second-order intermodulation calibration; direct-conversion receivers; gain boosting; mixer IM2 distortion; Bandwidth; Calibration; Circuits; Degradation; Intermodulation distortion; Noise reduction; Nonlinear distortion; Radio frequency; Radiofrequency amplifiers; Temperature;
fLanguage
English
Publisher
ieee
Conference_Titel
Solid-State Circuits Conference, 2006. ISSCC 2006. Digest of Technical Papers. IEEE International
Conference_Location
San Francisco, CA
ISSN
0193-6530
Print_ISBN
1-4244-0079-1
Type
conf
DOI
10.1109/ISSCC.2006.1696240
Filename
1696240
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