A Highly Linear Broadband CMOS LNA Employing Noise and Distortion Cancellation
Wei-Hung Chen; Gang Liu; Zdravko, B.; Niknejad, A.M.
Radio Frequency Integrated Circuits (RFIC) Symposium, 2007 IEEE
Volume , Issue , 3-5 June 2007 Page(s):61 - 64
Digital Object Identifier   10.1109/RFIC.2007.380833
Summary:This paper presents a broadband very low 3^rd -order intermodulation inductor-less low-noise amplifier (LNA) implemented in 0.13 mum CMOS technology. The LNA consists of a common-gate input stage for wideband impedance matching, followed by two parallel common source amplifiers which perform noise and distortion cancellation. Third-order distortion due to amplifier's second-order interaction is further minimized by employing a low second-order distortion PMOS/NMOS input pair. This LNA achieves +16 dBm IIP₃ in both the 900 MHz and 2 GHz bands. The LNA maintains minimum internal gain 14.5 dB, noise figure below 2.6 dB from 800 MHz-2.1 GHz while drawing 11.6 mA from a supply of 1.5 V.

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