Patent ID: 7936213

Claim:
A Doherty amplifier comprising: a first path circuit comprising a carrier amplifier and a first impedance adjusting circuit connected with the carrier amplifier; and a second path circuit comprising a peaking amplifier, a second impedance adjusting circuit connected with the peaking amplifier, and a peaking amplifier bias circuit connected with the peaking amplifier, wherein at least one among an impedance of the first impedance adjusting circuit, an impedance of the second impedance adjusting circuit, and a bias of the peaking amplifier bias circuit is adjusted in response to a control signal, and wherein each of the first impedance adjusting circuit and the second impedance adjusting circuit comprises at least one capacitor and at least one inductor, and at least one among a capacitance of the at least one capacitor and an inductance of the at least one inductor is adjusted in response to the control signal.