A new high-performance CMOS GHZ power amplifier design with common-mode signal cancellation technique

Abstract

This work describes a novel common-made signal rejection method for power amplifiers. A power amplifier with standard 1P5M 0.25mum CMOS technology was simulated and analyzed. This common-mode signal cancellation method makes the performance, in terms of output power and efficiency of the power amplifier, more immune to input common-mode signals than conventional power amplifiers. Simulated results indicate that this fully balanced differential power amplifier yields 24dBm output power at 2.45GHz, from a 3.3V power supply. The simulated drain efficiency is 33.21%, and the overall power-added efficiency is 32.84%. The power amplifier is highly linear.