Journal
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume 54, Issue 12, Pages 4079-4085Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMTT.2006.885889
Keywords
low-noise amplifier (LNA); nonlinearity; third-order input intercept point (IIP3); third-order intermodulation (IM3); Volterra series
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A low-noise amplifier (LNA) that achieves high third-order input intercept point (IIP3) at RF frequencies using a non-linearity cancellation technique is proposed. The circuit tackles the problem of the effect of the second-order nonlinearity on IIP3 at RF frequencies. The circuit functionality is analyzed using Volterra series. The linear LNA was designed and fabricated in a TSMC 0.35-mu m CMOS process. An IIP3 of +21 dBm was achieved with a gain of 11.5 dB, noise figure of 2.95 dB, and a power consumption of 9 mA at 2.5 V.
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