Power amplifier circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorMasatoshi Hase
Life of this patent
Estimating the term…
Abstract
Provided is a power amplifier circuit that can increase output power and also reduce the effect of intermodulation distortion. The power amplifier circuit includes a power divider, a distortion compensation circuit provided on the secondary path, a power combiner, and a first amplifier configured. The distortion compensation circuit includes a generation circuit configured to generate the second-harmonic wave of the input signal, a filter circuit configured to attenuate the fundamental wave and pass the second-harmonic wave, and a phase adjustment circuit configured to adjust the phase of the second-harmonic wave.
Claims11
A power amplifier circuit comprising:
- a power divider configured to divide an input signal, and to output the divided input signal to a primary path and a secondary path;
- a distortion compensation circuit in the secondary path;
- a power combiner configured to combine a fundamental wave of the input signal from the primary path with a second-harmonic wave of the input signal from the secondary path;
- and
- a first amplifier configured to amplify a combined signal outputted from the power combiner, and to output an amplified signal,
- wherein the distortion compensation circuit comprises:
- a generation circuit configured to generate the second-harmonic wave of the input signal,
- a filter circuit configured to attenuate the fundamental wave and to pass the second-harmonic wave, and
- a phase adjustment circuit configured to adjust a phase of the second-harmonic wave,
- wherein the distortion compensation circuit further comprises a second amplifier configured to amplify an amplitude of the second-harmonic wave, and
- wherein the second amplifier is between the generation circuit and the phase adjustment circuit.
A power amplifier circuit comprising:
- a power divider configured to divide an input signal, and to output the divided input signal to a primary path and a secondary path;
- a distortion compensation circuit in the secondary path;
- a power combiner configured to combine a fundamental wave of the input signal from the primary path with a second-harmonic wave of the input signal from the secondary path;
- and
- a first amplifier configured to amplify a combined signal outputted from the power combiner, and to output an amplified signal;
- a third amplifier in a stage preceding the power divider, the third amplifier being configured to output the input signal;
- and
- a second-harmonic-wave attenuation circuit between the power divider and the power combiner in the primary path, the second harmonic-wave attenuation circuit being configured to attenuate a signal in a frequency range of the second-harmonic wave,
- wherein the distortion compensation circuit comprises:
- a generation circuit configured to generate the second-harmonic wave of the input signal,
- a filter circuit configured to attenuate the fundamental wave and to pass the second-harmonic wave, and
- a phase adjustment circuit configured to adjust a phase of the second-harmonic wave.
Dependencies are inferred from the claim text.