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A Switched-Capacitor RF Power Amplifier

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5 Author(s)
Sang-Min Yoo ; Dept. of Electr. Eng., Univ. of Washington, Seattle, WA, USA ; Walling, J.S. ; Eum Chan Woo ; Jann, B.
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A fully integrated switched-capacitor power amplifier (SCPA) utilizes switched-capacitor techniques in an EER/Polar architecture. It operates on the envelope of a nonconstant envelope modulated signal as an RF-DAC in order to amplify the signal efficiently. The measured maximum output power and PAE are 25.2 dBm and 45%, respectively. When amplifying an 802.11g 64-QAM orthogonal frequency-division multiplexing (OFDM) signal, the measured error vector magnitude is 2.6% and the average output power and power-added efficiencies are 17.7 dBm and 27%, respectively.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:46 ,  Issue: 12 )
RFIC Virtual Journal, IEEE