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Distributed active transformer - a new power-combining andimpedance-transformation technique

Aoki, Ichiro and Kee, Scott D. and Rutledge, David B. and Hajimiri, Ali (2002) Distributed active transformer - a new power-combining andimpedance-transformation technique. IEEE Transactions on Microwave Theory and Techniques, 50 (1, pt.). pp. 316-331. ISSN 0018-9480. http://resolver.caltech.edu/CaltechAUTHORS:AOKieeemtt02

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Abstract

In this paper, we compare the performance of the newly introduced distributed active transformer (DAT) structure to that of conventional on-chip impedance-transformations methods. Their fundamental power-efficiency limitations in the design of high-power fully integrated amplifiers in standard silicon process technologies are analyzed. The DAT is demonstrated to be an efficient impedance-transformation and power-combining method, which combines several low-voltage push-pull amplifiers in series by magnetic coupling. To demonstrate the validity of the new concept, a 2.4-GHz 1.9-W 2-V fully integrated power-amplifier achieving a power-added efficiency of 41% with 50-Ω input and output matching has been fabricated using 0.35-μm CMOS transistors


Item Type:Article
Additional Information:© Copyright 2002 IEEE. Reprinted with permission. Manuscript received May 27, 2001. [Posted online: 2002-08-07] This work was supported by the Intel Corporation, the Army Research Office, the Jet Propulsion Laboratory, Infinion, and the National Science Foundation. The authors thank Conexant Systems for chip fabrication, particularly R. Magoon, F. In’tveld, J. Powell, A. Vo, and K. Moye. K. Potter, D. Ham, and H.Wu, all of the California Institute of Technology (Caltech), Pasadena, deserve special thanks for their assistance. The technical support for CAD tools from Agilent Technologies and Sonnet Software Inc., Liverpool, NY, are also appreciated. “Special Issue on Silicon-Based RF and Microwave Integrated Circuits”, IEEE Transactions on Microwave Theory and Techniques, vol. 50, no. 1, part 2
Subject Keywords:Circular geometry, CMOS analog integrated circuit, distributed active transformer, double differential, harmonic-control, impedance transformation, low voltage, power amplifier, power combining
Record Number:CaltechAUTHORS:AOKieeemtt02
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:AOKieeemtt02
Alternative URL:http://dx.doi.org/10.1109/22.981284
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6775
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:21 Dec 2006
Last Modified:26 Dec 2012 09:24

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