| 摘要 |
A power-amplifier arrangement (35) is disclosed. The power-amplifier arrangement (35) comprises a pulse modulator (40) adapted to receive a digital input signal of the power-amplifier arrangement (35) and generate, based on the digital input signal of the power-amplifier arrangement (35), an output signal of the pulse modulator (40) with a plurality of quantization levels. The pulse modulator has a plurality of output ports (50—1-50—n) for representing the output signal of the pulse modulator (40). Each output port (50—1-50—n) of the pulse modulator (40) is associated with a unique one of the quantization levels such that a signal output on the output port (50—1-50—n) adopts a first state when the output signal of the pulse modulator (40) equals or exceeds the associated quantization level, or, otherwise, a second state. The power-amplifier arrangement further comprises an amplifier section (55) comprising a plurality of amplifiers (60—1-60—n). Each amplifier (60—1-60—n) has an input port (65—1-65—n) operatively connected to a corresponding unique one of the output ports (50—1-50—n) of the pulse modulator (40) and an output port (70—1-70—n) for outputting an output signal of the amplifier (60—1-60—n), and a power-combining network (75) operatively connected to the output ports (70—1-70—n) of the amplifiers (60—1-60—n) and arranged to combine the output signals from the amplifiers (60—1-60—n) for generating an output signal of the power-amplifier arrangement (35). A related radio-transmitter circuit and a related radio-communication apparatus are also disclosed. |
