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US 2024/0195366 A1Published application
Amplifier circuit and radio-frequency circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorsIsao TAKENAKA, Hisanori NAMIE
Life of this patent
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Abstract
An amplifier circuit includes an inductor coupled to an amplifier, an inductor coupled to an amplifier, an inductor provided in series in a first output path connecting the amplifier and the inductor, a capacitor coupled to the first output path and the ground, a capacitor provided in series in a second output path connecting the amplifier and the inductor, an inductor coupled to the second output path and the ground, and a first circuit coupled between a first path connecting the inductors and a second path connecting the capacitor and the inductor.
Claims20
An amplifier circuit comprising:
- a first amplifier and a second amplifier;
- an output terminal;
- a first phase shifter circuit coupled between an output end of the first amplifier and the output terminal;
- a second phase shifter circuit coupled between an output end of the second amplifier and the output terminal;
- a first inductor provided in series in a first output path connecting the output end of the first amplifier and the first phase shifter circuit;
- a first capacitor coupled between the first output path and ground;
- a second capacitor provided in series in a second output path connecting the output end of the second amplifier and the second phase shifter circuit;
- a second inductor coupled between the second output path and ground;
- and
- a first circuit coupled between a first path connecting the first inductor and the first phase shifter circuit and a second path connecting the second capacitor and the second phase shifter circuit,
- the first circuit including
- a first resistor having one end configured to be coupled to the first path and another end configured to be coupled to the second path, and
- a first switch configured to selectively couple the first path and the second path to each other via the first resistor or without using the first resistor.
10 more elements
An amplifier circuit comprising:
- a first amplifier and a second amplifier;
- an output terminal;
- a first phase shifter circuit coupled between an output end of the first amplifier and the output terminal;
- a second phase shifter circuit coupled between an output end of the second amplifier and the output terminal;
- a third phase shifter circuit coupled to the output end of the first amplifier and the first phase shifter circuit, the third phase shifter circuit being configured to introduce a phase shift of a first phase amount to a radio-frequency signal;
- a fourth phase shifter circuit coupled to the output end of the second amplifier and the second phase shifter circuit, the fourth phase shifter circuit being configured to introduce a phase shift of a second phase amount to a radio-frequency signal, the second phase amount being different from the first phase amount by 90°;
- and
- a first circuit coupled between a first path connecting the third phase shifter circuit and the first phase shifter circuit and a second path connecting the fourth phase shifter circuit and the second phase shifter circuit,
- the first circuit including
- a first resistor having one end configured to be coupled to the first path and another end configured to be coupled to the second path, and
- a first switch configured to selectively couple the first path and the second path to each other via the first resistor or without using the first resistor.
8 more elements
An amplifier circuit comprising:
- a carrier amplifier and a peak amplifier;
- an output terminal;
- a first phase shifter circuit coupled between an output end of the carrier amplifier and the output terminal;
- a second phase shifter circuit coupled between an output end of the peak amplifier and the output terminal;
- a first inductor provided in series in a first output path connecting the output end of the carrier amplifier and the first phase shifter circuit;
- a first capacitor coupled between the first output path and ground;
- a second capacitor provided in series in a second output path connecting the output end of the peak amplifier and the second phase shifter circuit;
- and
- a second inductor coupled between the second output path and ground, wherein
- the first phase shifter circuit includes a third inductor, and
- the second phase shifter circuit includes a fourth inductor.
8 more elements
An amplifier circuit comprising:
- a carrier amplifier and a peak amplifier;
- an output terminal;
- a first phase shifter circuit coupled between an output end of the carrier amplifier and the output terminal;
- a second phase shifter circuit coupled between an output end of the peak amplifier and the output terminal;
- a fourth phase shifter circuit coupled to the output end of the carrier amplifier and the first phase shifter circuit, the fourth phase shifter circuit being configured to introduce a phase shift of a fourth phase amount to a radio-frequency signal;
- and
- a fifth phase shifter circuit coupled to the output end of the peak amplifier and the second phase shifter circuit, the fifth phase shifter circuit being configured to introduce a phase shift of a fifth phase amount to a radio-frequency signal, the fifth phase amount being different from the fourth phase amount by 90°, wherein
- the first phase shifter circuit is configured to have the same phase rotation amount as the second phase shifter circuit.
5 more elements
Dependencies are inferred from the claim text.