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公开(公告)号：US10476454B2
公开(公告)日：2019-11-12
申请号：US16280180
申请日：2019-02-20
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shota Ishihara , Seiko Ono , Yusuke Shimamune , Fuminori Morisawa , Shizuki Nakajima , Yuri Honda , Kazuhiro Koshio , Masato Sato
Abstract: A power amplifier module includes a first current source that outputs a first current corresponding to a level control voltage for controlling a signal level of an amplified signal, a second current source that outputs a second current corresponding to the level control voltage, a first transistor in which an input signal and a first bias current are supplied to a base and an emitter is grounded, a second transistor in which an emitter is connected to a collector of the first transistor, the second current is supplied to a base, and a first amplified signal obtained by amplifying the input signal is output from a collector, and a third transistor in which the first current is supplied to a collector, a bias control current or voltage is supplied to a base, and the first bias current is supplied from an emitter to the base of the first transistor.
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Patent Agency Ranking
公开(公告)号：US10361669B2
公开(公告)日：2019-07-23
申请号：US16033993
申请日：2018-07-12
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yusuke Shimamune
Abstract: An output circuit includes a first transistor, a second transistor, an operational amplifier that outputs a control voltage, and a switch circuit that controls voltage output in accordance with a control signal. When the control signal is in a first state, the switch circuit supplies the control voltage to the gate of the first transistor to turn on the first transistor and electrically connects the drain of first transistor to the operational amplifier so that a first output voltage is output from the drain of the first transistor. When the control signal is in a second state, the switch circuit supplies the control voltage to the gate of the second transistor to turn on the second transistor and electrically connects the drain of the second transistor to the operational amplifier so that a second output voltage is output from the drain of the second transistor.
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公开(公告)号：US10658984B2
公开(公告)日：2020-05-19
申请号：US16057287
申请日：2018-08-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yusuke Shimamune
Abstract: A differential amplifier circuit includes a differential pair including a first field-effect transistor (FET) and a second FET, a first current source that generates a current which flows in the first FET and the second FET, and an output circuit that outputs an output voltage corresponding to a difference between a gate voltage of the first FET and a gate voltage of the second FET in accordance with an operation of the differential pair. A back gate of the first FET is connected to a gate of the first FET, and a back gate of the second FET is connected to a gate of the second FET. A first feedback voltage corresponding to the output voltage is input to the gate of the second FET.
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公开(公告)号：US10256778B2
公开(公告)日：2019-04-09
申请号：US16013039
申请日：2018-06-20
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shota Ishihara , Seiko Ono , Yusuke Shimamune , Fuminori Morisawa , Shizuki Nakajima , Yuri Honda , Kazuhiro Koshio , Masato Sato
Abstract: A power amplifier module includes a first current source that outputs a first current corresponding to a level control voltage for controlling a signal level of an amplified signal, a second current source that outputs a second current corresponding to the level control voltage, a first transistor in which an input signal and a first bias current are supplied to a base and an emitter is grounded, a second transistor in which an emitter is connected to a collector of the first transistor, the second current is supplied to a base, and a first amplified signal obtained by amplifying the input signal is output from a collector, and a third transistor in which the first current is supplied to a collector, a bias control current or voltage is supplied to a base, and the first bias current is supplied from an emitter to the base of the first transistor.
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公开(公告)号：US20180294788A1
公开(公告)日：2018-10-11
申请号：US16007087
申请日：2018-06-13
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shota Ishihara , Yusuke Shimamune , Takashi Soga , Fuminori Morisawa , Seiko Ono , Tetsuaki Adachi
Abstract: Provided is a power amplification module that includes: an amplification transistor that has a constant power supply voltage supplied to a collector thereof, a bias current supplied to a base thereof and that amplifies an input signal input to the base thereof and outputs an amplified signal from the collector thereof; a first current source that outputs a first current that corresponds to a level control voltage that is for controlling a signal level of the amplified signal; and a bias transistor that has the first current supplied to a collector thereof, a bias control voltage connected to a base thereof and that outputs the bias current from an emitter thereof.
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公开(公告)号：US10020786B2
公开(公告)日：2018-07-10
申请号：US15201999
申请日：2016-07-05
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shota Ishihara , Yusuke Shimamune , Takashi Soga , Fuminori Morisawa , Seiko Ono , Tetsuaki Adachi
CPC classification number: H03G3/3042 , H03F1/565 , H03F3/19 , H03F3/245 , H03F2200/102 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/408 , H03F2200/451 , H03G3/3047 , H03G2201/40
Abstract: Provided is a power amplification module that includes: an amplification transistor that has a constant power supply voltage supplied to a collector thereof, a bias current supplied to a base thereof and that amplifies an input signal input to the base thereof and outputs an amplified signal from the collector thereof; a first current source that outputs a first current that corresponds to a level control voltage that is for controlling a signal level of the amplified signal; and a bias transistor that has the first current supplied to a collector thereof, a bias control voltage connected to a base thereof and that outputs the bias current from an emitter thereof.
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