Patent ID: 7746174
Filing Date: 2010-06-29
Classification: H01L,H03F

Abstract:
1. A power amplifier, comprising: a signal amplification section that includes a plurality of power devices, wherein the signal amplification section receives an input radio frequency (RF) signal, wherein the plurality of power devices are operative to amplify the input RF signal to generate a respective plurality of amplified signals, wherein the signal amplification section is provided on a first substrate; a signal combining section that is operative to combine the plurality of amplified signals into an output signal for delivery to a load, the signal combining section comprising a resistive substrate, a dielectric layer, and one or more metal layers deposited between the resistive substrate and the dielectric layer, the one or more metal layers patterned to form at least a plurality of primary windings inductively coupled to a single secondary winding, each primary winding coupled to a respective one of the plurality of power devices, wherein the single secondary winding is interleaved with the plurality of primary windings, the single secondary winding including a number of turns N2 such that N2>1, wherein the signal combining section is provided as an integrated passive device that is physically distinct from the first substrate; and a coupling device section that electrically connects the signal amplification section of the first substrate and the signal combining section provided as the integrated passive device.