DOHERTY AMPLIFIER CIRCUIT

Abstract: a doherty amplifier circuit includes a division node that divides an input signal into first and second signals, a main amplifier that amplifies the first signal and outputs an amplified first signal as a third signal, a first peak amplifier that amplifies the second signal, and outputs an amplified second signal as a fourth signal, and a combination node that combines the third signal and the fourth signal and outputs a combined signal to an output terminal as an output signal, wherein a first electrical length of a sum of an electrical length between the division node and the main amplifier and an electrical length between the main amplifier and the combination node is shorter than a second electrical length of a sum of an electrical length between the division node and the first peak amplifier and an electrical length between the first peak amplifier and the combination 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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