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公开(公告)号：US20190088768A1
公开(公告)日：2019-03-21
申请号：US16125234
申请日：2018-09-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Isao OBU , Yasunari UMEMOTO , Masahiro SHIBATA , Shigeki KOYA , Masao KONDO , Takayuki TSUTSUI
IPC: H01L29/737 , H01L29/205 , H01L29/08 , H01L29/10 , H01L29/417 , H01L29/423 , H01L29/45 , H01L21/306 , H01L21/02 , H01L21/285 , H01L21/311 , H01L21/308 , H01L29/66 , H03F3/213 , H03F3/195
Abstract: A bipolar transistor includes a collector layer, a base layer, and an emitter layer that are formed in this order on a compound semiconductor substrate. The emitter layer is disposed inside an edge of the base layer in plan view. A base electrode is disposed on partial regions of the emitter layer and the base layer so as to extend from an inside of the emitter layer to an outside of the base layer in plan view. An insulating film is disposed between the base electrode and a portion of the base layer, with the portion not overlapping the emitter layer. An alloy layer extends from the base electrode through the emitter layer in a thickness direction and reaches the base layer. The alloy layer contains at least one element constituting the base electrode and elements constituting the emitter layer and the base layer.
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Patent Agency Ranking
公开(公告)号：US20170244373A1
公开(公告)日：2017-08-24
申请号：US15588884
申请日：2017-05-08
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takayuki TSUTSUI , Tadashi MATSUOKA , Satoshi TANAKA
CPC classification number: H03G3/3042 , G05F1/56 , H03F1/0211 , H03F1/0216 , H03F1/0261 , H03F3/19 , H03F3/193 , H03F3/21 , H03F3/211 , H03F3/245 , H03F2200/18 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/408 , H03F2200/451 , H03F2203/21106 , H03F2203/21142 , H03G3/007 , H03G3/3047
Abstract: In a power amplifier module for performing slope control of a transmitting signal, a gain variation due to a variation in battery voltage is suppressed while suppressing an increase in circuit size. The power amplifier module includes: a first regulator for outputting a first voltage corresponding to a control voltage for controlling a signal level; a second regulator for outputting a second voltage that rises as a battery voltage drops; a first amplifier supplied with the first voltage as a power-supply voltage to amplify an input signal and output an amplified signal; and a second amplifier for amplifying the amplified signal, wherein the second amplifier includes a first amplification unit supplied with the second voltage as the power-supply voltage to amplify the amplified signal, and a second amplification unit supplied with the battery voltage as the power-supply voltage to amplify the amplified signal.
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公开(公告)号：US20170163229A1
公开(公告)日：2017-06-08
申请号：US15365092
申请日：2016-11-30
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Yasushi OYAMA , Takayuki TSUTSUI , Kazuhito NAKAI
CPC classification number: H03G1/0094 , H03F1/56 , H03F3/19 , H03F3/213 , H03F3/245 , H03F3/72 , H03F2200/111 , H03F2200/165 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2203/7209 , H03G2201/106 , H03G2201/40
Abstract: A power amplification module includes a first input terminal that receives a first transmit signal in a first frequency band, a second input terminal that receives a second transmit signal in a second frequency band having a narrower transmit/receive frequency interval than the first frequency band, a first amplification circuit that receives and amplifies the first transmit signal to produce a first amplified signal and outputs the first amplified signal, a second amplification circuit that receives and amplifies the second transmit signal to produce a second amplified signal and outputs the second amplified signal, a third amplification circuit that receives and amplifies the first or second amplified signal to produce an output signal and outputs the output signal, and an attenuation circuit located between the second input terminal and the second amplification circuit and configured to attenuate a receive frequency band component of the second frequency band.
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公开(公告)号：US20170099033A1
公开(公告)日：2017-04-06
申请号：US15274539
申请日：2016-09-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yusuke SHIMAMUNE , Satoshi TANAKA , Takayuki TSUTSUI , Hayato NAKAMURA , Kazuhito NAKAI , Fuminori MORISAWA
CPC classification number: H03F1/0222 , G05F3/262 , H03F1/301 , H03F1/302 , H03F3/04 , H03F3/191 , H03F3/193 , H03F3/21 , H03F2200/18 , H03F2200/451
Abstract: Provided is a current output circuit that includes: a first FET that has a power supply voltage supplied to a source thereof, that has a first voltage supplied to a gate thereof and that outputs a first current from a drain thereof; a second FET that has the power supply voltage supplied to a source thereof, that has the first voltage supplied to a gate thereof and that outputs an output current from a drain thereof; a first control circuit that controls the first voltage such that the first current comes to be at a target level; and a second control circuit that performs control such that a drain voltage of the first FET and a drain voltage of the second FET are made equal to each other.
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公开(公告)号：US20160072445A1
公开(公告)日：2016-03-10
申请号：US14831379
申请日：2015-08-20
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takayuki TSUTSUI , Tadashi MATSUOKA , Satoshi TANAKA
CPC classification number: H03G3/3042 , G05F1/56 , H03F1/0211 , H03F1/0216 , H03F1/0261 , H03F3/19 , H03F3/193 , H03F3/21 , H03F3/211 , H03F3/245 , H03F2200/18 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/408 , H03F2200/451 , H03F2203/21106 , H03F2203/21142 , H03G3/007 , H03G3/3047
Abstract: In a power amplifier module for performing slope control of a transmitting signal, a gain variation due to a variation in battery voltage is suppressed while suppressing an increase in circuit size. The power amplifier module includes: a first regulator for outputting a first voltage corresponding to a control voltage for controlling a signal level; a second regulator for outputting a second voltage that rises as a battery voltage drops; a first amplifier supplied with the first voltage as a power-supply voltage to amplify an input signal and output an amplified signal; and a second amplifier for amplifying the amplified signal, wherein the second amplifier includes a first amplification unit supplied with the second voltage as the power-supply voltage to amplify the amplified signal, and a second amplification unit supplied with the battery voltage as the power-supply voltage to amplify the amplified signal.
Abstract translation: 在用于执行发送信号的斜率控制的功率放大器模块中，抑制了由于电池电压的变化引起的增益变化，同时抑制了电路尺寸的增加。 功率放大器模块包括：第一调节器，用于输出对应于用于控制信号电平的控制电压的第一电压; 用于输出随电池电压下降而上升的第二电压的第二调节器; 提供第一电压的第一放大器作为电源电压以放大输入信号并输出放大的信号; 以及第二放大器，用于放大放大的信号，其中第二放大器包括第一放大单元，其被提供有第二电压作为电源电压以放大放大的信号;以及第二放大单元，其被提供有电池电压作为电源电压， 电源电压放大放大信号。
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公开(公告)号：US20140285268A1
公开(公告)日：2014-09-25
申请号：US14205407
申请日：2014-03-12
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Takayuki TSUTSUI , Satoshi TANAKA , Kenichi SHIMAMOTO
IPC: H03F1/30
CPC classification number: H03F1/0205 , H03F1/30 , H03F1/302 , H03F1/32 , H03F1/56 , H03F3/189 , H03F3/19 , H03F3/21 , H03F3/245 , H03F2200/108 , H03F2200/129 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/411 , H03F2200/447 , H03F2200/451 , H03F2200/555
Abstract: An radio frequency amplifying circuit includes an amplifying transistor configured to amplify a radio frequency signal input to a base of the amplifying transistor via a matching network to output the amplified radio frequency signal, a first bias transistor connected to the amplifying transistor based on a current-mirror connection to supply a bias to the amplifying transistor, and a second bias transistor connected to the base of the amplifying transistor based on an emitter-follower connection to supply a bias to the amplifying transistor.
Abstract translation: 射频放大电路包括：放大晶体管，被配置为经由匹配网络放大输入到放大晶体管的基极的射频信号，以输出放大的射频信号;第一偏置晶体管，基于电流 - 反射镜连接以向放大晶体管提供偏置;以及第二偏置晶体管，其基于发射极跟随器连接到放大晶体管的基极，以向放大晶体管提供偏置。
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