Patent ID: 9172338
Filing Date: 2015-10-27
Classification: H03F,H04B

Abstract:
1. A power amplifier comprising: power amplifier cells located in a die; conductive contacts overlying a surface of the die and coupled to the amplifier cells; and conductive lines overlying a surface of the die between the conductive contacts and coupled to the power amplifier cells, wherein the conductive lines form part of a transformer circuit of the power amplifier, the transformer circuit includes a single turn transmission line type transformer circuit, and the conductive lines form at least part of a primary and a secondary of the transformer circuit, the conductive contacts include solder bumps, the conductive lines are routed in areas between the conductive contacts, and, wherein power amplifier cells include a first group of power amplifier cells located inside the transformer circuit and a second group of power amplifier cells located outside the transformer circuit.