Abstract
In this paper, a novel current-mode differential transconductance wide band low noise amplifier (LNA) designed in the chartered 0.18μm CMOS technology is proposed to realize the receiver front-end. The proposed LNA frequency ranges from 4GHz to 6GHz. It utilizes two stage structure, with a current-mirror using inductive series peaking technique to achieve optimized current output.The noise performance is improved through the use of a gm-boosting technique, while the gain performance is improved and power consumption is saved by using current-reused technique. Simulation results demonstrate that the circuit provides flat transconductance gain higher than 17dB, noise figure lower than 2.25dB and low operating voltage of 0.85V in frequency band.A comparison with other LNAs in similar and nearby frequency bands shows the proposed LNA has advantages of higher gain,lower noise figure and better other performances.
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