A low-power noise-canceling LNA with downward impedance transformer and resistive feedback

A 0.18μm CMOS LNA for low-power and wide-band applications is presented in this paper. Based on a common-gate-common-source (CG-CS) noise-canceling topology, a resistive feedback LNA and a downward impedance transformer are introduced to save more power while maintaining wide-band input matching. Post simulation shows that the NF is lower than 2.6dB with 2.4dB minimum; S11<;-13dB and S21=23dB from 1GHz to 1.8GHz. The LNA consumes only 3.2mA under 1.8V supply voltage within 0.04mm
²
chip area.