A Highly Linear Broadband CMOS LNA with Noise Cancellation

A broadband low-noise amplifier (LNA) design that utilizes simultaneous noise and distortion cancellation is presented. The proposed LNA utilizes a PMOS and individual stages with common-gate and common-source cascade for second-order and third- order distortion cancellation. The LNA IIP3 is limited by the second-order interaction between the common source and common gate stages. The LNA is designed using standard 0.18μm CMOS technology. The LNA achieves S21 of 12.1 dB and the NF is lower than 3.1 dB over 0.7-2.5GHz.The IIP3 is +8dBm at 1.5GHz.