Patent ID: 8855588

Claim:
A power amplifying apparatus, comprising: a reference signal generator for providing a reference signal alternating between an enabling state and a disabling state; a digital power amplifier generating an internal current based on the reference signal and a data generator signal, and generating an output signal related to the internal current, wherein when the reference signal is in the enabling state, the output signal is related to the data generator signal, when the reference signal is in the disabling state, the output signal is irrelevant to the data generator signal; and a data generator generating the data generator signal and outputting the data generator signal to the digital power amplifier, comprising: a multiplexer, wherein the multiplexer outputs the data generator signal; and a controller, wherein the controller comprises an AND gate, the AND gate receives the reference signal and a delayed signal, the delayed signal is generated by delaying the reference signal, and the AND gate outputs a control signal; wherein when the reference signal is in the enabling state, the data generator signal is alternating between an in-phase signal and a quadrature-phase signal, when the reference signal is in the disabling state, the data generator signal is a fixed signal; and wherein the multiplexer receives the in-phase signal and the quadrature-phase signal, and the controller generates the control signal based on the reference signal for controlling the multiplexer to select the in-phase signal or the quadrature-phase signal for outputting.