A CMOS RF power amplifier using an off-chip transmision line transformer with 62% PAE

In this letter, a two-stage 900-MHz CMOS differential power amplifier (PA) is designed and implemented in a 0.18-mu m 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 31.7 dBm and a power-added efficiency of 62.4% with a power gain of 30.3 dB, including the losses of the bond-wires and the output transformer.
Publisher
IEEE-Inst Electrical Electronics Engineers Inc
Issue Date
2007-05
Language
ENG
Citation

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, v.17, no.5, pp.385 - 387

ISSN
1531-1309
DOI
10.1109/LMWC.2007.895723
URI
http://hdl.handle.net/10203/1577
Appears in Collection
EE-Journal Papers(저널논문)
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