Patent ID: 8049564
Filing Date: 2011-11-01
Classification: H03F

Abstract:
1. A power amplifier comprising a plurality of pairs of transistors, each pair comprising a first transistor and a second transistor having each a respective input terminal and a respective output terminal; the output terminals of the first and second transistors of each pair being connected to an output distributed active transformer coupled to a differential output of the power amplifier, wherein the input terminals of the first and second transistors of each pair are connected to an input distributed active transformer coupled to an input of the power amplifier and wherein said input distributed active transformer comprises an input primary element and a plurality of input secondary elements including at least one first input secondary element and one second input secondary element, adjacent to each other, and the input terminal of the first transistor of a pair is coupled to an end of the first input secondary element and the input terminal of the second transistor of said pair is coupled to an end of the second input secondary element and the input primary element faces said plurality of input secondary elements.