Title :
A CMOS RF Power Amplifier Using an Off-Chip Transmision Line Transformer With 62% PAE
Author :
Jaemin Jang ; Changkun Park ; Haksun Kim ; Hong, Seong-Kwan
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon
fDate :
5/1/2007 12:00:00 AM
Abstract :
In this letter, a two-stage 900-MHz CMOS differential power amplifier (PA) is designed and implemented in a 0.18-mum radio frequency CMOS process. A transmission line transformer on a printed circuit board is used as an output power combiner and matching circuits of a class-E power stage. To drive the power stage effectively, cascaded class-D amplifiers are used as driver amplifiers. The PA delivers an output power of 31.7dBm and a power-added efficiency of 62.4% with a power gain of 30.3dB, including the losses of the bond-wires and the output transformer
Keywords :
CMOS analogue integrated circuits; differential amplifiers; microwave power amplifiers; 0.18 micron; 900 MHz; CMOS RF power amplifier; PAE; class D; class E; driver amplifier; off-chip transmision line transformer; power added efficiency; CMOS process; Differential amplifiers; Distributed parameter circuits; Driver circuits; Power amplifiers; Power generation; Power transmission lines; Printed circuits; Radio frequency; Radiofrequency amplifiers; CMOS power amplifier (PA); Class-D; class-E; driver amplifier; power added efficiency (PAE); transformer;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2007.895723
