Patent ID: 7960758

Claim:
A radio frequency amplifier circuit comprising: a first terminal; a second terminal; a first base electrode connected to said first terminal; a second base electrode connected to said second terminal; a base layer connected to said first base electrode and said second base electrode; an emitter electrode located between said first base electrode and said second base electrode; a third terminal; a third base electrode connected to said third terminal and said base layer; and a collector electrode, wherein: said first base electrode is configured to receive a direct-current bias, said second base electrode is configured to receive a radio frequency signal, the direct-current bias and the radio frequency signal are separately applied to said base layer and then synthesized in said base layer, said emitter electrode is grounded, said collector electrode is configured to output an amplified radio frequency signal, said first base electrode and said second base electrode are directly in contact with said base layer, a direct-current bias is supplied to said first terminal, a first radio frequency signal is supplied to said second terminal, a second radio frequency signal different from the first radio frequency signal is supplied to said third terminal, and the direct-current bias, the first radio frequency signal and the second radio frequency signal are synthesized in said base layer.