Fully balanced low-noise transconductance amplifiers with P1dB > 0dBm in 45nm CMOS

This paper presents two linear broadband inductorless Low Noise Transconductance Amplifiers (LNTA) featuring high linearities for large signal (P_1dB) and small signal (IIP3). The LNTAs utilize the complementary characteristics of NMOS and PMOS transistors to enhance the linearity. First prototype is a fully balanced current reuse LNTA achieving 0.12GHz bandwidth, minimum NF of 3dB, IIP3 of 10.8dBm and P_1dB of 0dBm while dissipating 35mW. Second prototype proposes a low power bulk driven LNTA with 20mW of power consumption achieving comparable performances. Each LNTA occupy 0.06mm² in 45nm CMOS.