Abstract: The present application provides a high-efficiency low-distortion power output circuit and a high-frequency low-distortion power output circuit including a modulator, these power output circuits being configured so that an input digital value can be directly connected to an antenna. In the power output circuit, one ends of a plurality of physical elements are commonly connected to an output terminal. The other ends of the physical elements are each switchably connected to a first or second reference voltage source via a corresponding one of switching elements. This circuit is characterized by having a switch control circuit. The switch control circuit performs such control that a predetermined number of switching elements are alternately operated while the remaining number of switching elements are connected to any of the reference voltage sources or a switching element configured for interconnection is added.