A Fully Integrated 900 MHz Power Amplifier with New Transformer Network in CMOS Technology

In this paper, a fully integrated 900-MHz CMOS differential power amplifier (PA) with new power combiner is designed and fabricated in a 0.18- um technology. For the high power CMOS PA design, new transformer network and the number of power stages is fully analyzed and optimized to find inductors dimensions. A parallel combination of the Class AB and the Class C amplifier or multiple gated common source transistors in power stages was used to improve both the linear operating range and the power efficiency simultaneously. The PA delivers an output power of 29 dBm and a power-added efficiency of 24\% with a power gain of 20 dB, including the losses of the bond-wires. Copyright (C) 2009 Praise Worthy Prize S.r.l. - All rights reserved