A Switched-Capacitor RF Power Amplifier
J. Solid-State Circuits（2011）
摘要
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.
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关键词
switched capacitor networks,error vector magnitude,orthogonal frequency-division multiplexing,scpa,rf-dac,nonconstant envelope modulated signal,ofdm modulation,power amplifiers,switched-capacitor circuits,power-added efficiency,envelope elimination and restoration (eer),efficiency 45 percent,polar transmitter,efficiency 27 percent,802.11g 64-qam,quadrature amplitude modulation,linearization,eer-polar architecture,ofdm signal,class-d,fully integrated switched-capacitor power amplifier,cmos,digital-analogue conversion,rf dac,capacitors,switched capacitor,rf power amplifier,power amplifier,cmos technology,power added efficiency,cmos integrated circuits,power generation,radio frequency,switched capacitor circuits
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