Patent ID: 8330544

Claim:
A power amplification circuit comprising: input terminals receiving differential input signals; a first amplifier coupled to a first terminal of said input terminals; a second amplifier coupled to a second terminal of said input terminals; a third amplifier coupled to said first terminal; a fourth amplifier coupled to said second terminal; a first capacitor coupled between an output of said first amplifier and an output of said second amplifier; a second capacitor whose capacitance is different from that of said first capacitor, coupled between an output of said third amplifier and an output of said fourth amplifier; a first primary inductor coupled between the output of said first amplifier and the output of said second amplifier; a second primary inductor coupled between the output of said third amplifier and the output of said fourth amplifier; a first secondary inductor provided in opposed position to said first primary inductor; and a second secondary inductor provided in opposed position to said second primary inductor, wherein said first and second secondary inductors are coupled in series between output terminals.