DOHERTY AMPLIFIER CIRCUIT AND SEMICONDUCTOR DEVICE

Abstract: a doherty amplifier circuit includes a divider configured to divide a received input signal into a first signal and a second signal, a circuit board, a first amplifier amplifying the first signal and output the amplified first signal as a fourth signal, a second amplifier and amplifying the second signal and output the amplified second signal as a fifth signal, a combining node combining the fourth signal and the fifth signal into a combined signal and output the combined signal to an output terminal as an output signal, an open stub, the open stub having an end electrically connected to a path between the divider and the first amplifier, and a first impedance converter, the first impedance converter having a first end electrically connected to the second amplifier and a second end electrically connected to the combining node.

Inventor(s): Takashi SUMIYOSHI

CPC Classification: H03F1/0288 (Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation)

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