Patent ID: 8416022
Filing Date: 2013-04-09
Classification: H03F

Abstract:
1. A power amplifier device, comprising: a primary inductor comprising a plurality of inductor elements in plan view; a ground pattern provided to extend from a portion of a region inside the primary inductor outside the primary inductor, in plan view; a plurality of transistor pairs, each being provided for linking with each of the plurality of inductor elements; and a secondary inductor including one turn of winding or multiple turns of winding, the secondary inductor provided so as to surround the primary inductor, wherein, to both ends of each of the plurality of inductor elements, first main electrodes of first and second transistors forming a transistor pair in linkage with the inductor element are coupled respectively, and wherein second main electrodes of the first and second transistors are coupled to the ground pattern in the region inside the primary inductor.