| 摘要 |
An RF signal generator divides an input radio signal into an amplitude signal and a phase signal and outputs the amplitude signal and the phase signal. A switching amplifier amplifies the radio signal with the amplitude signal and the phase signal. The switching amplifier includes at least one variable current sources that is controlled by the amplitude signal and supplies a current to the switching amplifier. The switching amplifier includes at least one switching elements that connects the variable current sources to one of a terminal connected a ground potential and an output terminal of the switching amplifier according to the phase signal.
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