This paper presents a highly-linear high-gain low noise amplifier (LNA) based on the inter stage technique. The linearized LNA is achieved by using the linear cascode amplifier as output stage utilizing a modified derivative superposition method and functionality is analyzed using Volterra series. Using simulations in 0.18μm CMOS technology, the IIP 3 is improved by more than 37dBm reaching to +3dBm, with the cost of decrease 10dB gain at 5.7GHz frequency band. The LNA consumes 18.7mW power under 1.8V supply voltage. Compared to previously published LNA designs, the proposed LNA has the smallest noise figure of 2.1 dB, highest gain 21.5 dB, and the highest Figure of Merit of 3.15.
This paper presents a highly-linear, low power, low noise amplifier (LNA) using a novel nonlinearity cancellation technique by employing the folded cascode topology. The circuit functionality is analyzed using Volterra series analysis. The linear LNA was designed and simulated in a TSMC 0.18μm CMOS process at 5GHz frequency. By employing the new technique, the IIP 3 is improved by more than 14dB compare to conventional folded cascode LNA reaching to +1dBm without any significant effect on the other LNA parameters. The proposed LNA also delivers a voltage gain (S 21 ) of 12.4 dB with a noise figure of 3.9 dB, while consuming only 1.27 mW dc power with a low supply voltage of 0.6 V.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.