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A Quadrature Switched Capacitor Power Amplifier
2016
IEEE Journal of Solid-State Circuits
This paper presents an all-digital class-G quadrature switched-capacitor power amplifier (Q-SCPA) implemented in 65nm CMOS. It combines in-phase (I) and quadrature (Q) signals on a shared capacitor array. The I/Q signals are digitally weighted and combined in the charge domain. Quadrature summation results in a 3-dB signal loss; Hence the Q-SCPA utilizes a class-G dual-supply architecture to improve efficiency at backoff. Unlike polar/EER counterparts, the Q-SCPA requires no wideband phase
doi:10.1109/jssc.2015.2496956
fatcat:6rdzfnqkvjh75jrl7cergej62i