Patent attributes
Described herein are representative embodiments of amplifiers having selectable power output while maintaining low power consumption. In certain exemplary embodiments, the amplifiers are operated as linear power amplifiers, such as may be used in wireless communication systems. According to one exemplary embodiment, a circuit is described comprising a control system configured to operate the circuit in at least a first mode and a second mode. The circuit of this embodiment further includes a first amplifier section configured to amplify at least a portion of an input signal and produce a first amplified signal on a first signal path in the first mode of operation, a second amplifier section configured to amplify at least a portion of an input signal and produce a second amplified signal on a second signal path in the second mode of operation, and an impedance inverter having an input coupled to the first and second signal paths.
