Patent attributes
A power amplifier circuit includes a first power amplifier, a balun, a second power amplifier, and a third power amplifier. The second and third power amplifiers each include unit bipolar transistors each including a first terminal electrically connected to a reference potential, a second terminal, and a third terminal that outputs an amplified signal; a common input terminal electrically connected to the second terminals of the transistors and receives an RF signal; a common bias terminal electrically connected to the second terminals of the transistors and receives a bias current; a common output terminal electrically connected to the third terminals of the transistors and outputs the amplified signal; and resistance elements each of which is electrically connected between the common input terminal and the second terminal of a corresponding one of the transistors and cuts a DC component of the bias current.
