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公开(公告)号：US20240146271A1
公开(公告)日：2024-05-02
申请号：US18499666
申请日：2023-11-01
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masatoshi HASE , Koudai SUGIYAMA , Masamichi TOKUDA , Seiko NETSU
CPC classification number: H03F3/60 , H01P5/10 , H01P5/18 , H03F1/56 , H03F2200/451
Abstract: A first transmission line transformer receives and outputs an unbalanced signal and performs impedance transformation. A second transmission line transformer performs unbalanced-to-balanced transformation. The first transmission line transformer includes a first main line and a first sub-line. The direction of the first main line is identical to the direction of the first sub-line. An end of the first sub-line is grounded. An end of the first main line is coupled to the unbalanced-signal input/output node. The second transmission line transformer includes a second main line and a second sub-line. The direction of the second main line is identical to a direction of the second sub-line. An end of the second main line and the second sub-line are grounded. An end of the second main line and the second sub-line are coupled to the balanced-signal input/output nodes.
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公开(公告)号：US20210058040A1
公开(公告)日：2021-02-25
申请号：US17078189
申请日：2020-10-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Makoto TABEI , Ken WAKAKI , Masamichi TOKUDA , Daisuke WATANABE
Abstract: An amplifier circuit amplifies a radio-frequency signal. The amplifier circuit includes an amplifier, an input matching circuit connected to an input side of the amplifier and matches impedance, and a protection circuit connected to a node in a path within a path between an input matching circuit and the amplifier. The protection circuit includes a first diode connected between the node and a ground, and a second diode connected in parallel with the first diode and connected in a direction opposite to the first diode between the node and the ground. A threshold voltage of each of the first diode and the second diode is greater than a maximum voltage amplitude of the input signal at the node and is less than a difference between a withstand voltage of the amplifier and the bias voltage.
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公开(公告)号：US20210203283A1
公开(公告)日：2021-07-01
申请号：US17132090
申请日：2020-12-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masamichi TOKUDA
Abstract: A high-frequency circuit includes an amplifier, a power distributor disposed on an output route of the amplifier, a first by-pass route that bypasses the amplifier, a second by-pass route that bypasses the power distributor, a first switch and a second switch disposed in series on the first by-pass route, and a third switch disposed in series on the second by-pass route. The first by-pass route is connected to a first node on a route connecting a signal input terminal and the amplifier and a second node on a route connecting the amplifier and the power distributor. The second by-pass route is connected to a third node between the first switch and the second switch and a fourth node on an output route of the power distributor.
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公开(公告)号：US20200373890A1
公开(公告)日：2020-11-26
申请号：US16879930
申请日：2020-05-21
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masamichi TOKUDA
Abstract: An amplification circuit includes: an amplifier including a transistor that is connected between an input terminal and an output terminal; an input matching network that is connected between the input terminal and an input side of the amplifier and converts an impedance from a low impedance to a high impedance; a limiter circuit that is connected between a node between the input matching network and the input side of the amplifier, and ground and includes two diodes connected in opposite directions to each other; and a capacitor that is connected in series with the limiter circuit between the node and ground.
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公开(公告)号：US20240162871A1
公开(公告)日：2024-05-16
申请号：US18504274
申请日：2023-11-08
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masatoshi HASE , Koudai SUGIYAMA , Masamichi TOKUDA , Seiko NETSU
IPC: H03F3/45
CPC classification number: H03F3/45475 , H03F2200/06 , H03F2200/09 , H03F2200/451
Abstract: A main line (transmission line) has a first end and a second end. A sub-line (transmission line) coupled to the main line has a third end and a fourth end. The main line and the sub-line are coupled to each other. A direction of the main line is identical to a direction of the sub-line. An unbalanced node is connected to the first end. The first balanced node is connected to the first end, and the second balanced node is connected to the fourth end. The second end and the third end are connected to a reference potential. A first LC resonant circuit is connected between the first balanced node and the unbalanced node, the second balanced node and the fourth end, or the first end and the unbalanced node.
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Patent Agency Ranking
公开(公告)号：US20220069777A1
公开(公告)日：2022-03-03
申请号：US17401539
申请日：2021-08-13
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tsutomu OONARO , Masamichi TOKUDA , Makoto TABEI , Kazuaki DEGUCHI , Takayuki KAWANO
Abstract: An amplifier device includes an amplifier including cascade-connected power amplifiers in a plurality of stages and a bias circuit configured to supply bias currents to the amplifier. A bias current supplied to a power amplifier in the first stage of the power amplifiers in the plurality of stages exhibits a positive temperature characteristic. A bias current supplied to a power amplifier in the final stage exhibits a negative temperature characteristic.
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公开(公告)号：US20150303152A1
公开(公告)日：2015-10-22
申请号：US14659664
申请日：2015-03-17
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masamichi TOKUDA , Ryangsu KIM , Naru MORITO
IPC: H01L23/552 , H01L23/00 , H01L23/498 , H01L23/31
CPC classification number: H01L23/552 , H01L21/568 , H01L23/3107 , H01L23/3135 , H01L23/49506 , H01L23/49541 , H01L23/49822 , H01L23/49838 , H01L24/48 , H01L2224/05599 , H01L2224/29139 , H01L2224/32245 , H01L2224/48177 , H01L2224/48227 , H01L2224/48247 , H01L2224/73265 , H01L2224/85005 , H01L2224/85399 , H01L2924/00014 , H01L2924/181 , H01L2924/18165 , H01L2224/45015 , H01L2924/207 , H01L2924/00012 , H01L2224/45099 , H01L2924/00
Abstract: A semiconductor package includes the following elements. A high-output switch IC includes an IC top surface on which an electrode is disposed and an IC bottom surface on which no electrode is disposed. A connecting terminal is formed at a position outside a projection region toward a side portion of the semiconductor package. The projection region is a region projected in a thickness direction of the high-output switch IC. A wire electrically connects the electrode and the connecting terminal. A mold resin section covers the IC top surface and the wire and also covers a surface of the connecting terminal to which the wire is connected. A surface of the connecting terminal opposite to the surface to which the wire is connected is not covered with the mold resin section but is exposed. The IC bottom surface is not covered with a metal.
Abstract translation: 半导体封装包括以下元件。 高输出开关IC包括其上设置有电极的IC顶表面和没有设置电极的IC底表面。 连接端子形成在朝向半导体封装的侧部的突出区域外侧的位置处。 投影区域是在高输出开关IC的厚度方向上投影的区域。 电线将电极和连接端子电连接。 模具树脂部分覆盖IC顶表面和导线，并且还覆盖连接线的连接端子的表面。 与导线连接的表面相对的连接端子的表面没有被模制树脂部分覆盖，而是被露出。 IC底部表面没有被金属覆盖。
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公开(公告)号：US20240162870A1
公开(公告)日：2024-05-16
申请号：US18503549
申请日：2023-11-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masatoshi HASE , Koudai SUGIYAMA , Masamichi TOKUDA , Seiko NETSU
IPC: H03F3/45
CPC classification number: H03F3/45475 , H03F2200/06 , H03F2200/09 , H03F2200/451
Abstract: A main line (transmission line) having a first end and a second end. A sub-line (transmission line) coupled to the main line. An unbalanced signal is input to and output from an unbalanced node connected to the first end. A balanced signal is input to and output from a first balanced node and a second balanced node. The main line and the sub-line are coupled to each other. A direction of the main line is identical to a direction of the sub-line. The second end and the third end are connected to a reference potential. The first balanced node and the second balanced node are connected to the unbalanced node and the fourth end, respectively. A first LC resonant circuit is connected between the second end and the reference potential or the third end and the reference potential.
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公开(公告)号：US20230336130A1
公开(公告)日：2023-10-19
申请号：US18340194
申请日：2023-06-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masamichi TOKUDA
CPC classification number: H03F1/565 , H03F1/223 , H03F2200/222 , H03F2200/387 , H03F2200/451
Abstract: An amplifier includes a transistor on a side to which a radio-frequency signal is input and a transistor on a side to which the radio-frequency signal is output that are connected in cascade. The amplifier includes an input matching network connected to an input end of the transistor, and an output matching network connected to an output end of the transistor. The input matching network includes a transmission line transformer. The transmission line transformer includes lines. One of the lines is connected between an input terminal for the radio-frequency signal and the transistor. The other line is disposed so as to be able to couple to the line via an electromagnetic field, one end thereof is connected to a node between the line and the input terminal for the radio-frequency signal, and another end thereof is connected between the line and a ground potential.
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公开(公告)号：US20210175862A1
公开(公告)日：2021-06-10
申请号：US17111773
申请日：2020-12-04
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Keiichi HONDA , Masamichi TOKUDA
Abstract: Provided is an amplification circuit that includes: a low-noise amplifier that includes an FET as an amplification element and that amplifies a radio-frequency signal inputted to the gate of the FET; an input matching network that matches the input impedance of the low-noise amplifier; and a switch that is serially connected between ground and a node on a line connecting the input matching network and the gate of the FET to each other.
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