Patent ID: 7952433
Filing Date: 2011-05-31
Classification: H03F

Abstract:
1. A power amplifier system, comprising: a plurality of unit power amplifiers, wherein each unit power amplifier includes at least one respective output port, at least one respective bias control port, and at least one respective switch control port; a plurality of primary windings, wherein each primary winding is connected to the at least one respective output port of a respective one of the plurality of unit power amplifiers; a secondary winding inductively coupled to the plurality of primary windings, wherein the secondary winding provides an overall output; a bias controller, wherein the bias controller provides, based at least in part on a level of output power, a respective bias voltage to one or more of the plurality of unit power amplifiers via the at least one respective bias control port; and a switch controller, wherein the switch controller operates to activate or deactivate at least one of the plurality of unit power amplifiers via a respective control signal to the respective switch control port.