Volume 50, Issue 2 pp. 470-473

A class-E CMOS RF power amplifier with cascaded class-D driver amplifier

Jaemin Jang

Corresponding Author

Jaemin Jang

School of Electrical Engineering and Computer Science, Division of Electrical Engineering Korea Advanced Institute of Science and Technology, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Korea

School of Electrical Engineering and Computer Science, Division of Electrical Engineering Korea Advanced Institute of Science and Technology, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of KoreaSearch for more papers by this author
Hongtak Lee

Hongtak Lee

School of Electrical Engineering and Computer Science, Division of Electrical Engineering Korea Advanced Institute of Science and Technology, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Korea

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Changkun Park

Changkun Park

School of Electrical Engineering and Computer Science, Division of Electrical Engineering Korea Advanced Institute of Science and Technology, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Korea

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Songcheol Hong

Songcheol Hong

School of Electrical Engineering and Computer Science, Division of Electrical Engineering Korea Advanced Institute of Science and Technology, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Korea

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First published: 20 December 2007
Citations: 6

Abstract

A 800-MHz power amplifier is designed using a 0.18-μm RF CMOS process. The voltage-combining method is used for power combining. A transmission line transformer on a printed circuit board (PCB) is designed as a power combiner. For the switching mode power amplifier, a cascaded class-D driver amplifier is proposed using a feedback resistor and a DC-blocking capacitor. The power amplifier has an output power of 32.9 dBm and a power-added efficiency of 60.25%. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 470–473, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23106

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