The fully-integrated CMOS RF power amplifier using the semilumped transformer

Abstract

A semilumped output transformer for fully-integrated RF CMOS power amplifier is proposed in this paper. To demonstrate this transformer, a 2.5-GHz CMOS power amplifier is implemented with a 0.18-mu m RF CMOS process used for WiMAX application. The power amplifier can achieve 39% PAE (power added efficiency) at P 1dB (1 dB compression point) and output power of 30 dBm. The linearity can satisfy the spectrum mask of the WiMAX signal requirement basically. (c) 2008 Wiley Periodicals, Inc.