A Low Power Inductorless LNA With Double ${\rm G} _{\rm m}$ Enhancement in 130 nm CMOS

This paper presents the design of a low power differential Low Noise Amplifier (LNA) in 130 nm CMOS technology for 2.45 GHz ISM band applications. The circuit benefits from several g_m-enhancements. These techniques provide a high gain and reduced Noise Figure (NF) in spite of the low intrinsic g_m of the MOS transistors. Moreover, the circuit is fully inductorless. Main design points are described and the performance tradeoffs of the circuit are discussed. A prototype has been implemented and it exhibits a 20 dB gain with a 4 dB NF while dissipating 1.32 mW. The IIP₃ is -12 dBm for an input compression point of -21 dBm.