Patent ID: 8659354

Claim:
A power-amplifier arrangement comprising: a pulse modulator configured to receive a digital input signal of the power-amplifier arrangement and generate, based on the digital input signal of the power-amplifier arrangement, an output signal of the pulse modulator with a plurality of quantization levels; wherein the pulse modulator has a plurality of output ports for representing the output signal of the pulse modulator and each output port of the pulse modulator is associated with a unique one of the quantization levels such that a signal output on the output port adopts: a first state when the output signal of the pulse modulator equals or exceeds the associated quantization level; or otherwise adopts a second state; and an amplifier section comprising: a plurality of amplifiers, wherein each amplifier has an input port operatively connected to a corresponding unique one of the output ports of the pulse modulator, and an output port for outputting an output signal of the amplifier; and a power-combining network operatively connected to the output ports of the amplifiers and arranged to combine the output signals from the amplifiers for generating an output signal of the power-amplifier arrangement.