An amplifier architecture can include an input circuit for splitting a signal into first and second portions, and carrier and peaking amplification paths for receiving the first and second portions. The architecture can further include an output circuit having a balun transformer circuit with first and second coils, with the first coil between first and second ports, the second coil between third and fourth ports, the first and third ports coupled by a first capacitance, and the second and fourth ports coupled by a second capacitance. The first port can receive a first signal from the carrier amplification path, and the fourth port can receive a second signal from the peaking amplification path. The second port can provide a combination of the first signal and the second signal as an amplified signal. A termination circuit can be provided to couple the third port to a ground.