US 12,283,934 B2
Switching circuit and front end circuit
Risa Takeda, Kyoto (JP); and Takehiko Kato, Kyoto (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed on Mar. 30, 2023, as Appl. No. 18/192,819.
Claims priority of application No. 2022-060625 (JP), filed on Mar. 31, 2022.
Prior Publication US 2023/0318576 A1, Oct. 5, 2023
Int. Cl. H03H 11/04 (2006.01)
CPC H03H 11/04 (2013.01) 13 Claims
OG exemplary drawing
 
1. A switching circuit comprising:
a first antenna terminal and a second antenna terminal;
a first input-output terminal and a second input-output terminal;
a plurality of switches that is configured to selectively switch connection of the first input-output terminal between the first antenna terminal and the second antenna terminal, to selectively switch connection of the second input-output terminal between the first antenna terminal and the second antenna terminal, and to selectively connect the first input-output terminal and the second input-output terminal to each other; and
a ground switch that has a first end electrically connected to the second input-output terminal through one or more of the plurality of switches, and has a second end connected to ground,
wherein when the first input-output terminal is connected to the first antenna terminal, a first path switch, a second path switch, and the ground switch are in conducting states, and a third path switch is in a non-conducting state,
wherein the first path switch is one of the plurality of switches and is in a first path connecting the first input-output terminal and the first antenna terminal to each other,
wherein the second path switch is one of the plurality of switches,
wherein the second path switch and the ground switch are in a second path connecting the second input-output terminal and ground to each other, and
wherein the third path is one of the plurality of switches and is in a third path connecting the first path and the second path to each other.