A low power low noise amplifier for portable GPS receivers

An integrated 1.5 GHz low power Low Noise Amplifier (LNA) for portable global positioning system (GPS) receivers is proposed based on SMIC 180 nm 1P6M RF CMOS process. The MOS transistors in the proposed LNA are biased in moderately inverted region to achieve low power. The post-layout simulation results show that, at worst case, a voltage gain of 19 dB is achieved with noise figure (NF) of 4.2 dB, an input third order intermodulation point (IIP3) of -14 dBm and an input return loss of -8 dB. The power consumption of the circuit is only 1 mW at supply voltage of 0.7 V. The ratio of gain to dc power consumption is 19 dB/mW.