Radio-frequency circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorsShinya Hitomi, Hirotsugu Mori
Life of this patent
Estimating the term…
Abstract
A radio-frequency circuit includes a first power amplifier, first and second filters, an attenuation circuit, and a switch. The first power amplifier supports a first power class which allows for maximum output power higher than power class 3. The first filter has a pass band including a first band and is connected between the first power amplifier and an antenna connecting terminal. The second filter has a pass band including a second band and is connected to the antenna connecting terminal. The radio-frequency circuit can perform simultaneous communication of the first band and the second band. The attenuation circuit and the switch are connected in series with each other between a ground and a transmit path connecting the first power amplifier and the antenna connecting terminal.
Claims20
A radio-frequency circuit comprising:
- a first power amplifier that supports a first power class, the first power class allowing for maximum output power higher than power class 3;
- a first filter that has a pass band including a first band and that is connected between the first power amplifier and an antenna connecting terminal;
- a second filter that has a pass band including a second band and that is connected to the antenna connecting terminal;
- the radio-frequency circuit being able to perform simultaneous communication of the first band and the second band;
- and
- an attenuation circuit and a switch that are connected in series with each other between a ground and a transmit path, the transmit path connecting the first power amplifier and the antenna connecting terminal, wherein
- the attenuation circuit has an attenuation band including at least part of the second band and includes an inductor which is connected between the transmit path and the ground,
- the switch has a first terminal connected to the attenuation circuit and a second terminal connected to the transmit path or the ground, and
- the switch connects the first terminal to the second terminal based on the radio-frequency circuit being in a state to perform simultaneous communication of the first band and the second band, and the switch does not connect the first terminal to the second terminal based on the radio-frequency circuit not being in the state to perform simultaneous communication of the first band and the second band.
A radio-frequency circuit comprising:
- a first power amplifier that supports a first power class, the first power class allowing for maximum output power higher than power class 3;
- a second power amplifier;
- a first filter that has a pass band including a first band and that is connected between the first power amplifier and an antenna connecting terminal;
- a second filter that has a pass band including a second band and that is connected between the second power amplifier and the antenna connecting terminal, the radio-frequency circuit being able to perform simultaneous communication of the first band and the second band;
- and
- an attenuation circuit and a switch that are connected in series with each other between a ground and a transmit path, the transmit path connecting the second power amplifier and the antenna connecting terminal, wherein
- the attenuation circuit has an attenuation band including at least part of the first band and includes an inductor which is connected between the transmit path and the ground,
- the switch has a first terminal connected to the attenuation circuit and a second terminal connected to the transmit path or the ground, and
- the switch connects the first terminal to the second terminal based on the radio-frequency circuit being in a state to perform simultaneous communication of the first band and the second band, and the switch does not connect the first terminal to the second terminal based on the radio-frequency circuit not being in the state to perform simultaneous communication of the first band and the second band.
Dependencies are inferred from the claim text.