Patent ID: 8022760
Filing Date: 2011-09-20
Classification: H03F

Abstract:
1. An electronic device comprising: an N-way Doherty amplifier with an amplifier input and an amplifier output, wherein: the amplifier has a main stage, and (N−1) peak stages in an ordered arrangement; the (N−1) peak stages include at least a first peak stage and a second peak stage; the amplifier has an input network connecting the amplifier input to a first input of the main stage, and to respective inputs of respective ones of the peak stages; the amplifier has an output network connecting, on one hand, a first output of the main stage, and respective outputs of respective ones of the (N−1) peak stages to the amplifier output, on another hand; the output network implements a first impedance, as experienced by the main stage, with a first phase shift of 90° between the first output and the amplifier output; the output network implements a respective further impedance as experienced by a respective one of the (N−1) peak stages, with a respective further phase shift between the output of the respective peak stage and the amplifier output; each specific one of the further phase shifts for a specific one of the peak stages is larger by 90° than another further phase shift of another one of the peak stages next in the ordered arrangement;