Patent ID: 8594596
Filing Date: 2013-11-26
Classification: H03F

Abstract:
1. An amplifier comprising: a first amplification element configured to amplify a first signal in one of a first operation class and a second operation class; a second amplification element configured to amplify a second signal in one of a first operation class and a second operation class; a first transmission line through which the amplified first signal is transferred; and a coupler configured to couple the first signal transferred through the first transmission line and the amplified second signal so as to transfer the coupled signal to a second transmission line, wherein the first amplification element amplifies the first signal in the first operation class and the second amplification element amplifies the second signal in the second operation class, when the first signal and the second signal have a first frequency band, and wherein the first amplification element amplifies the first signal in the second operation class and the second amplification element amplifies the second signal in the first operation class, when the first signal and the second signal have a second frequency band.