A power-combined switched-capacitor power amplifier in 90nm CMOS

A power-combined switched-capacitor power amplifier in 90nm CMOS

A digitally-controlled switched-capacitor RF power amplifier (SCPA) is implemented with a transformer-based power-combiner in 90nm CMOS. The individual SCPA cores can be controlled to provide high average output power and linearity in an "all-switching" mode or increased dynamic range in a...

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Bibliographische Detailangaben
Hauptverfasser: Sang-Min Yoo, Walling, J. S., Eum-Chan Woo, Allstot, David J.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Capacitors
CMOS integrated circuits
Couplings
EER
polar transmitters
Power amplifiers
power combining circuits
Power generation
Radio frequency
switched capacitor circuits
Switches
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Beschreibung
Zusammenfassung:A digitally-controlled switched-capacitor RF power amplifier (SCPA) is implemented with a transformer-based power-combiner in 90nm CMOS. The individual SCPA cores can be controlled to provide high average output power and linearity in an "all-switching" mode or increased dynamic range in a "sequential-switching" mode. The SCPA delivers a peak (average) output power of 27.0 (20.3) dBm with a peak (average) PAE of 26% (15.1%) for a 64 QAM OFDM modulated signal with a measured EVM of 3.8% in the 2.4 GHz band.
ISSN:1529-2517
2375-0995
DOI:10.1109/RFIC.2011.5940622