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김학선

Kim, Hak Sun
Internet of Things System Lab.
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A CMOS RF power amplifier using an off-chip transmision line transformer with 62% PAE

Author(s)
Jang, JaeminPark, ChangkunKim, HaksunHong, Songcheol
Issued Date
2007-05
DOI
10.1109/LMWC.2007.895723
URI
https://scholarworks.unist.ac.kr/handle/201301/21543
Fulltext
http://ieeexplore.ieee.org/document/4167922/
Citation
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, v.17, no.5, pp.385 - 387
Abstract
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
ISSN
1531-1309
Keyword (Author)
class-Dclass-ECMOS power amplifier (PA)driver amplifierpower added efficiency (PAE)transformer

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