-
公开(公告)号：US11909382B2
公开(公告)日：2024-02-20
申请号：US17390016
申请日：2021-07-30
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masakazu Tani
CPC classification number: H03H9/70 , H03H9/0004 , H03H9/542 , H04B1/40
Abstract: A multiplexer includes a common terminal, a first reception output terminal, a second reception output terminal, a first filter that is connected between the common terminal and the first reception output terminal, a second filter that is connected between the common terminal and the second reception output terminal and that has a passband different from that of the first filter, and an impedance matching circuit that is disposed between the common terminal and the second filter. The impedance matching circuit includes a serial arm resonator disposed in series on a path connecting the common terminal to the second filter.
-
公开(公告)号：US10382006B2
公开(公告)日：2019-08-13
申请号：US16145438
申请日：2018-09-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Hideki Tsukamoto , Masakazu Tani , Kei Matsutani
IPC: H04B1/38 , H03H7/46 , H03H7/075 , H03F3/19 , H03H7/24 , H03H7/38 , H03H9/54 , H04B1/04 , H04B1/10 , H03H9/56 , H03H9/60 , H03H9/64
Abstract: A first attenuation circuit is connected between a node and ground, and the node is located between a ladder resonance circuit and a transmitter-side terminal. A second attenuation circuit is connected between a first parallel arm resonator of the ladder resonance circuit and ground and is connected in series to the first parallel arm resonator. The first attenuation circuit includes a second parallel arm resonator and a first switch that switches between a first state in which the second parallel arm resonator is connected to the node and a second state in which the first switch is open. The second attenuation circuit includes a capacitor and a second switch that switches between a first state in which the capacitor is connected to the first parallel arm resonator and a second state in which the first parallel arm resonator is connected to ground.
-
公开(公告)号：US20180019731A1
公开(公告)日：2018-01-18
申请号：US15718330
申请日：2017-09-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Hideki Tsukamoto , Masakazu Tani
CPC classification number: H03H9/542 , H03H9/0009 , H03H9/6406 , H03H9/6423 , H03H9/6483 , H03H9/706 , H03H9/725
Abstract: A high-frequency filter (10) includes resonators (21, 31, and 32), an inductor (41), and a switch (51). The resonator (21) is connected between a first input/output terminal (P1) and a second input/output terminal (P2). One end of the inductor (41) is connected between the resonator (21) and the first input/output terminal (P1). One end of the resonator (31) is connected to the other end of the inductor (41). The switch (51) selects either a connection portion that connects the inductor (41) and the resonator (31) or the resonator (32) and connects either the connection portion or the resonator (32), which has been selected, to a terminal of the resonator (21) on the side of the second input/output terminal (P2). The switching between the connection modes of the switch (51) changes the circuit configuration of the high-frequency filter (10).
-
公开(公告)号：US20160352310A1
公开(公告)日：2016-12-01
申请号：US15232372
申请日：2016-08-09
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masakazu Tani , Shouzo Sugiyama
CPC classification number: H03H9/542 , H03H7/0153 , H03H7/12 , H03H9/568 , H03H9/605 , H03H9/64 , H03H9/6403 , H03H9/6483 , H03H2210/025 , H04B1/525
Abstract: A filter circuit includes a serial arm connected between ports (P1-P2), a parallel arm having a resonator connected in series between ports (P1-P3), and another parallel arm having another resonator connected in series between ports (P2-P3). The serial arm includes a switching circuit, and the switching circuit connects an inductor or a capacitor to the serial arm in series using a switch.
Abstract translation: 滤波器电路包括连接在端口（P1-P2）之间的串联臂，具有在端口（P1-P3）之间串联连接的谐振器的并联臂，以及具有在端口（P2-P3）之间串联连接的另一谐振器的另一个并联臂， 。 串联臂包括开关电路，开关电路使用开关将电感器或电容器串联连接到串联臂。
-
公开(公告)号：US12294405B2
公开(公告)日：2025-05-06
申请号：US17661771
申请日：2022-05-03
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masakazu Tani
IPC: H04B1/40
Abstract: In a radio-frequency circuit, a first switch is connected to an antenna terminal. A second switch is connected to the first switch and is connected to the antenna terminal via the first switch. A first filter is connected to the first switch without having the second switch interposed therebetween and allows a radio-frequency signal of a first communication band to pass through the first filter. A second filter is connected to the first switch via the second switch and allows a radio-frequency signal of a second communication band to pass through the second filter. The second communication band is higher than the first communication band. The radio-frequency circuit further includes an inductor. The inductor is not connected in series with the first filter and is connected in series with the first switch and the second switch between the first switch and the second switch.
-
Patent Agency Ranking
公开(公告)号：US12040822B2
公开(公告)日：2024-07-16
申请号：US16996064
申请日：2020-08-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yusuke Naniwa , Morio Takeuchi , Masakazu Tani
CPC classification number: H04B1/0057 , H04B1/006 , H04B1/745
Abstract: A multiplexer includes first, second, and third filters with first, second, and third frequency bands different from each other, a first connection point connected to a common terminal, a second connection point connected to one end of the first filter and one end of the second filter, a first switch that switches connection and disconnection between the first and second connection points, a reactance element whose one end is connected to a signal path connecting the second connection point and the first switch, a second switch that switches connection and disconnection between the other end of the reactance element and the first connection point, and a third switch that switches connection and disconnection between one end of the third filter and the first connection point. The first and second frequency bands are adjacent to each other among the first, second, and third frequency bands.
-
公开(公告)号：US11777473B2
公开(公告)日：2023-10-03
申请号：US17009933
申请日：2020-09-02
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masakazu Tani
CPC classification number: H03H9/72 , H03F3/19 , H03H9/02559 , H03H9/145 , H03H9/25 , H03H9/64 , H04B1/0057 , H03F2200/451
Abstract: Filters 10 and 20 having respective pass bands different from each other, a common terminal to which a terminal 11 of the filter 10 and a terminal of the filter 20 are connected, and an inductor of which one end is connected to the terminal 11 and another end is connected to the common terminal. The filter 10 includes a longitudinally coupled resonator formed of a resonator 132 and resonators 131 and 133 disposed on both sides of the resonator 132, in which the resonator 132 is connected to the terminal 11, and a parallel resonator of which one end is connected to the resonator 132 and another end is connected to a ground electrode, and the resonator 132 and the parallel resonator of the resonators included in the filter 10 are connected to a signal path between the resonator 132 and the terminal 11.
-
公开(公告)号：US10886895B2
公开(公告)日：2021-01-05
申请号：US16244379
申请日：2019-01-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masakazu Tani
Abstract: Even when frequency characteristics are changed in association with multiple communication bands, an attenuation required for a specific frequency band outside a pass band is obtained. A frequency-variable filter (10) includes multiple series-arm resonators (111, 112, 113), multiple parallel-arm resonators (121, 122, 123), a variable capacitor (21), and an inductor (31) having a fixed inductance. The multiple series-arm resonators (111, 112, 113) and the multiple parallel-arm resonators (121, 122, 123) are connected in a ladder shape. The variable capacitor (21) is connected in series with the parallel-arm resonator (121). The fixed inductor (31) is connected in series with the parallel-arm resonator (123).
-
公开(公告)号：US10187038B2
公开(公告)日：2019-01-22
申请号：US15079287
申请日：2016-03-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masakazu Tani
Abstract: A resonant circuit includes a resonator. An inductor is connected in parallel with the resonator. An inductor is connected in series with the parallel circuit formed of the resonator and the inductor. Further, a variable capacitor is connected in parallel with a series circuit formed of the inductor and the parallel circuit formed of the resonator and the inductor. The variable capacitor is connected in series with these circuits. As a result, a resonant circuit and a high-frequency filter supporting more communication signals are provided.
-
公开(公告)号：US10700659B2
公开(公告)日：2020-06-30
申请号：US16246822
申请日：2019-01-14
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masakazu Tani
IPC: H03H7/46 , H04B1/52 , H03H9/54 , H03F3/189 , H03H9/70 , H03F3/24 , H03H9/72 , H03H7/01 , H03H7/075 , H03H7/38 , H04B1/40 , H03F3/68
Abstract: Even when frequency characteristics are changed in association with multiple communication bands, an attenuation required for a specific frequency band outside a pass band is obtained. A multiplexer includes a transmission filter, a reception filter, and a common connection point. An antenna-side end of the transmission filter and an antenna-side end of the reception filter are connected to the common connection point. The transmission filter includes multiple resonators including a parallel-arm resonator and a variable capacitor that is connected in series with the parallel-arm resonator. An inductor for forming an attenuation pole is provided between the antenna-side end of the reception filter and the common connection point. By the inductor for forming an attenuation pole and the reception filter, which is capacitive, an attenuation pole at a frequency close to or equal to a specific frequency outside the pass band of a transmission signal is formed.
-
-
-
-
-
-
-
-
-
Search Results
24
records
(took 0.016 seconds)
