Patent ID: 7973620
Filing Date: 2011-07-05
Classification: H03H

Abstract:
1. A power amplifier filter for radio-frequency signals having an outphasing type architecture comprising a first stage capable of generating, from an input signal s(t), two signals s 1 (t), s 2 (t) having an identical amplitude but phase shifted relative to each other, a second amplifier stage for said signals s 1 (t), s 2 (t), and a third recombining stage capable of summing the two signals s′ 1 (t), s′ 2 (t) obtained from second stage ( 3 ), wherein the recombining stage includes an assembly of acoustic wave resonators coupled to each other, some of these resonators referred to as “input resonators” being connected to the outputs of second stage and others of these resonators referred to as “output resonators” being connected to the output terminals of the filter.