A 0.3–6GHz broadband noise cancelling low noise amplifier

Abstract

A broadband noise cancelling low noise amplifier (LNA) composed of a CS stage, a single-to-differential (S-to-D) converter, a voltage combiner, a negative feedback network, and a couple of differential-to-single buffers is proposed for multi-standard radio application in this paper. Different from conventional broadband feedback LNA, the proposed LNA shows improved performance parameters including gain, noise figure (NF), 1dB compression point (P1dB), and input-referred third-order intercept point (IIP3), Especially for wideband LNA design. The LNA is fabricated in TSMC 0.13-gm process. From 0.3 to 6GHz, the simulated results show a high-gain of 20 dB, a superior low noise figure of 1.6dB at 3GHz, input power at 1dB compression point (P1dB) of −19.2dBm at 2GHz, it consume 13.2mA from a 1.2V supply and occupies an area of 0.19 mm2.