Patent ID: 7877063

Claim:
A high-frequency amplifier including: a reception signal amplifying part, a transmission signal amplifying part which is separate and distinct from the reception signal amplifying part, and an inductor; said reception signal amplifying part having a reception signal input terminal, and a first transmission/reception switching control terminal; said transmission signal amplifying part having a transmission signal input terminal, and a second transmission/reception switching control terminal; and a common output terminal to which an output of the reception signal amplifying part and an output of the transmission signal amplifying part are connected; wherein, switching of operations of the reception signal amplifying part and the transmission signal amplifying part is carried out such that, during a reception mode, control signals are input to the first transmission/reception switching control terminal and to the second transmission/reception switching control terminal, whereby the transmission signal amplifying part is turned off, and the reception signal amplifying part is turned on to amplify a reception signal that is inputted from the reception signal input terminal, and during a transmission mode, control signals are input to the first transmission/reception switching control terminal and to the second transmission/reception switching control terminal, whereby the reception signal amplifying part is turned off, and the transmission signal amplifying part is turned on to amplify a transmission signal that is inputted from the transmission signal input terminal; and said inductor is connected between a DC power supply terminal and the common output terminal as a load that is common to the reception signal amplifying part and the transmission signal amplifying part.