DOHERTY AMPLIFIER CIRCUIT

Abstract: doherty amplifier circuit includes a divider configured to divide an input signal into a first signal to a third signal and makes power of the second signal larger than that of the third signal, a main amplifier configured to amplify the first signal and output the amplified signal as a fourth signal, a first peak amplifier configured to amplify the second signal and output the amplified signal as a fifth signal, a second peak amplifier configured to amplify the third signal and output the amplified signal as a sixth signal, and a combiner configured to combine the fourth signal, the fifth signal and the sixth signal and output the combined signal as an output signal to an output terminal. an input power of the input signal for turning on the first peak amplifier is smaller than the input power for turning on the second peak amplifier.

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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