Radio-frequency circuit and communication device
AssigneeMurata Manufacturing Co., Ltd.
InventorsMorio Takeuchi, Syunsuke Kido
Life of this patent
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Abstract
A radio-frequency circuit includes a first switch which includes a common terminal, a first selection terminal, and a second selection terminal, and switches between connecting the common terminal and the first selection terminal and connecting the common terminal and the second selection terminal; a first low-noise amplifier including an input terminal connected to the first selection terminal, and a second low-noise amplifier including an input terminal connected to the second selection terminal. The frequency band in which the first low-noise amplifier amplifies a radio-frequency signal by at least a predetermined gain includes the frequency band in which the second low-noise amplifier amplifies a radio-frequency signal by at least a predetermined gain.
Claims16
A radio-frequency circuit, comprising:
- a first switch including a common terminal, a first selection terminal, and a second selection terminal, the first switch configured to switch between connecting the common terminal and the first selection terminal and connecting the common terminal and the second selection terminal;
- a first low-noise amplifier including an input terminal connected to the first selection terminal;
- and
- a second low-noise amplifier including an input terminal connected to the second selection terminal,
- wherein a first bandwidth in which the first low-noise amplifier is configured to amplify radio-frequency signals by at least a first predetermined gain, is greater than a second bandwidth in which the second low-noise amplifier is configured to amplify radio-frequency signals by at least a second predetermined gain, and
- the first predetermined gain is equal to the second predetermined gain.
A radio-frequency circuit, comprising:
- a first switch including a common terminal, a first selection terminal, and a second selection terminal, and configured to switch between connecting the common terminal and the first selection terminal and connecting the common terminal and the second selection terminal;
- a first low-noise amplifier including an input terminal connected to the first selection terminal;
- a second low-noise amplifier including an input terminal connected to the second selection terminal;
- and
- a first filter connected to the common terminal, the first filter having a passband that includes frequency bands which the first low-noise amplifier and second low-noise amplifier are configured to amplify,
- wherein the first low-noise amplifier and the second low-noise amplifier each include a plurality of transistors connected in multiple stages,
- wherein a total number of stages of the plurality of transistors included in the first low-noise amplifier is different from a total number of stages of the plurality of transistors included in the second low-noise amplifier,
- wherein a first bandwidth in which the first low-noise amplifier is configured to amplify radio-frequency signals by at least a first predetermined gain, is greater than a second bandwidth in which the second low-noise amplifier is configured to amplify radio-frequency signals by at least a second predetermined gain, and
- wherein the first predetermined gain is equal to the second predetermined gain.
Dependencies are inferred from the claim text.