US 2026/0213778 A1Published application

Filter switching circuit

AssigneeMurata Manufacturing Co., Ltd.

InventorsYuito SAWAYAMA, Tomoya ODA, Tetsurou ASHIDA

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Abstract

A filter switching circuit includes: a first node supplied with a first amplified signal in a first radio frequency band in a first mode; a second node that is supplied, in the first mode, with a second amplified signal in the first radio frequency band having a phase identical to a phase of the first amplified signal and that is supplied, in a second mode, with a third amplified signal in a second radio frequency band; a semiconductor switching element including a first end connected to the first node and a second end connected to the second node; a first semiconductor switching circuit including a first common terminal connected to the second node and first individual terminals; a second semiconductor switching circuit including a second common terminal connected to a first output terminal.

Claims15

Dependent claims

A filter switching circuit comprising:

a first node that is supplied with a first amplified signal in a first radio frequency band when the filter switching circuit operates in a first mode;
a second node that is supplied, when the filter switching circuit operates in the first mode, with a second amplified signal in the first radio frequency band having a phase identical to a phase of the first amplified signal and that is supplied, when the filter switching circuit operates in a second mode, with a third amplified signal in a second radio frequency band;
a semiconductor switch having a first end connected to the first node and a second end connected to the second node, the semiconductor switch being configured to switch between electrical connection and non-connection between the first end and the second end;
a first semiconductor switching circuit comprising a first common terminal connected to the second node and M first individual terminals, M being an integer greater than or equal to 2, the first semiconductor switching circuit being configured to switch between electrical connection and non-connection between the first common terminal and any one of the first individual terminals;
a second semiconductor switching circuit comprising a second common terminal connected to a first output terminal, M second individual terminals respectively connected to the M first individual terminals through M first wiring lines, and a third individual terminal connected to the first node through a second wiring line, the second semiconductor switching circuit being configured to switch between electrical connection and non-connection between the second common terminal and any one of the M second individual terminals or the third individual terminal;
M first filters respectively provided on the M first wiring lines;
and
a second filter provided on the second wiring line.

5 more elements

A filter switching circuit comprising:

a first node that is supplied with a first amplified signal in a first radio frequency band when the filter switching circuit operates in a first mode;
a second node that is supplied, when the filter switching circuit operates in the first mode, with a second amplified signal in the first radio frequency band having a phase identical to a phase of the first amplified signal, and that is supplied, when the filter switching circuit operates in a second mode, with a third amplified signal in a second radio frequency band;
a semiconductor switch having a first end connected to the first node and a second end connected to the second node, the semiconductor switch being configured to switch between electrical connection and non-connection between the first end and the second end;
a first semiconductor switching circuit comprising a first common terminal connected to the second node and M first individual terminals, M being an integer greater than or equal to 2, the first semiconductor switching circuit being configured to switch between electrical connection and non-connection between the first common terminal and any one of the M first individual terminals;
a second semiconductor switching circuit comprising a fourth common terminal connected to a third wiring line, M second individual terminals respectively connected to the M first individual terminals through M first wiring lines, a third individual terminal connected to the first node through a second wiring line, and a fifth common terminal connected to a fourth wiring line, the second semiconductor switching circuit being configured to switch between electrical connection and non-connection between the fourth common terminal and any one of the M second individual terminals, and being configured to switch between electrical connection and non-connection between the fifth common terminal and either at least one of the M second individual terminals or the third individual terminal;
M first filters respectively provided on the M first wiring lines;
and
a second filter on the fourth wiring line.

5 more elements

A filter switching circuit comprising:

a first node that is supplied with a first amplified signal in a first radio frequency band when the filter switching circuit operates in a first mode;
a second node that is supplied, when the filter switching circuit operates in the first mode, with a second amplified signal in the first radio frequency band having a phase identical to a phase of the first amplified signal, and that is supplied, when the filter switching circuit operates in a second mode, with a third amplified signal in a second radio frequency band;
a semiconductor switch having a first end connected to the first node and a second end connected to the second node, the semiconductor switch being configured to switch between electrical connection and non-connection between the first end and the second end;
a first semiconductor switching circuit comprising a first common terminal connected to the second node and M first individual terminals, M being an integer greater than or equal to 2, the first semiconductor switching circuit being configured to switch between electrical connection and non-connection between the first common terminal and any one of the M first individual terminals;
a second semiconductor switching circuit comprising a seventh common terminal connected to a first output terminal, M second individual terminals respectively connected to the M first individual terminals through M first wiring lines, a third individual terminal connected to the first node through a second wiring line, a sixth individual terminal, and an eighth common terminal connected to the sixth individual terminal through a fifth wiring line, the second semiconductor switching circuit being configured to switch between electrical connection and non-connection between the seventh common terminal and any one of the M second individual terminals or the sixth individual terminal, and being configured to switch between electrical connection and non-connection between the eighth common terminal and either at least one of the M second individual terminals or the third individual terminal;
M first filters respectively provided on the M first wiring lines;
and
a second filter provided on the fifth wiring line.

5 more elements

Dependencies are inferred from the claim text.