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A 2.4-GHz, 2.2-W, 2-V fully-integrated CMOS circular-geometry active-transformer power amplifier

Aoki, Ichiro and Kee, Scott D. and Rutledge, David and Hajimiri, Ali (2001) A 2.4-GHz, 2.2-W, 2-V fully-integrated CMOS circular-geometry active-transformer power amplifier. In: IEEE Conference on Custom Integrated Circuits (CICC 2001), San Diego, CA, 6-9 May 2001. IEEE , Piscataway, NJ, pp. 57-60. ISBN 0-7803-6591-7.

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A 2.4-GHz, 2.2-W, 2-V fully integrated circular geometry power amplifier with 50 Ω input and output matching is fabricated using 2.5V, 0.35 pm CMOS transistors. It can also produce 450mW using a 1V supply. Harmonic suppression is 64dB or better. An on-chip circular-geometry active-transformer is used to combine several push-pull low-voltage amplifiers efficiently to produce a larger output power while maintaining a 50 Ω match. This new on-chip power combining and impedance matching method uses virtual ac grounds and magnetic couplings extensively to eliminate the need for any off-chip component such as wirebonds. It also desensitizes the operation of the amplifier to the inductance of bonding wires and makes the design more reproducible. This new topology makes possible a fully-integrated 2.2W, 2.4GHz, low voltage CMOS power amplifier for the first time.

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Additional Information:The authors thank Conexant Systems for chip fabrication, particularly R. Magoon, F. In’tveld, J. Powell, A. Vo, and K. Moye. We also acknowledge Intel corp., Army research office, JPL, Infinion, and NSF for support of this project. K. Potter, D. Ham, and H. Wu of Caltech, deserve special thanks for their assistance. The technical support for CAD tools from Agilent Technologies and SONNET Software, Inc. are also appreciated.
Funding AgencyGrant Number
Conexant SystemsUNSPECIFIED
Army Research OfficeUNSPECIFIED
Jet Propulsion LaboratoryUNSPECIFIED
National Science FoundationUNSPECIFIED
Agilent TechnologiesUNSPECIFIED
Subject Keywords:CMOS analog integrated circuits; MMIC power amplifiers; UHF integrated circuits; UHF power amplifiers; high-frequency transformers; impedance matching; power combiners; CMOS power amplifier; LV CMOS process; active-transformer power amplifier; fully-integrated power amplifier; harmonic control; impedance matching method; magnetic couplings; on-chip circular-geometry active-transformer; on-chip power combining; push-pull LV amplifiers; virtual AC grounds
Record Number:CaltechAUTHORS:AOKcicc01
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:11470
Deposited By: Kristin Buxton
Deposited On:08 Sep 2008 17:46
Last Modified:03 Oct 2019 00:19

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