Optimization of Current-Reused LNA with PSO Algorithm

A. Parhizkar Tarighat, M. Yargholi


This paper presents a tunable narrow band Low Noise Amplifier (LNA), which is optimized at the frequency of 4.4 GHz. Relating to the proposed low noise amplifier that has current-reused structure drawn from the auxiliary gate-source capacitor of the main transistor and the bypass capacitor, the performance of the LNA is tuned. The temperature and source variations can change the operational frequency and desired parameters. In this paper, the shift of the frequency is compensated using the particle swarm optimization (PSO) algorithm. The designed low noise amplifier with particle swarm optimization algorithm in the present of PVT (Process, Voltage, and Temperature) variations achieves a voltage gain of 12.52 dB, with corresponding noise figure (NF) of 1.80 dB, input return loss (S11) of -37 dB, and output return loss (S22) of -42 dB at the frequency of 4.4 GHz. The die area of the designed LNA is 939.5µm*746.83µm.


Current Reused; Optimization; Low Noise Amplifier; PSO Algorithm;

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