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公开(公告)号：US20180287565A1
公开(公告)日：2018-10-04
申请号：US16002349
申请日：2018-06-07
发明人： Kiichiro Takenaka , Masahiro Ito , Masakazu Hori , Mitsuo Ariie , Hayato Nakamura , Satoshi Arayashiki , Hidetoshi Matsumoto , Tsuyoshi Sato , Satoshi Tanaka
IPC分类号： H03F1/02 , H03G3/00 , H03F3/19 , H03F1/32 , H03F1/52 , H03F1/56 , H03F3/21 , H03F3/04 , H03F1/42
CPC分类号： H03F1/0222 , H03F1/02 , H03F1/0216 , H03F1/0261 , H03F1/32 , H03F1/42 , H03F1/52 , H03F1/56 , H03F3/04 , H03F3/19 , H03F3/21 , H03F2200/102 , H03F2200/408 , H03F2200/411 , H03F2200/444 , H03F2200/451 , H03G3/004
摘要： Improvement in linearity is achieved at low costs in a power amplifier module employing an envelope tracking system. The power amplifier module includes a first power amplifier circuit that amplifies a radio frequency signal and that outputs a first amplified signal, a second power amplifier circuit that amplifies the first amplified signal on the basis of a source voltage varying depending on amplitude of the radio frequency signal and that outputs a second amplified signal, and a matching circuit that includes first and second capacitors connected in series between the first and second power amplifier circuit and an inductor connected between a node between the first and second capacitors and a ground and that decreases a gain of the first power amplifier circuit as the source voltage of the second power amplifier circuit increases.
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公开(公告)号：US20170310281A1
公开(公告)日：2017-10-26
申请号：US15646743
申请日：2017-07-11
发明人： Masao Kondo , Hidetoshi Matsumoto
CPC分类号： H03F1/0222 , H03F1/0227 , H03F1/0261 , H03F1/0277 , H03F3/19 , H03F3/211 , H03F3/245 , H03F2200/102 , H03F2200/105 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/451 , H03F2203/21131
摘要： A power amplifier module includes an amplifier transistor and a bias circuit. A first power supply voltage based on a first operation mode or a second power supply voltage based on a second operation mode is supplied to the amplifier transistor. The amplifier transistor receives a first signal and outputs a second signal obtained by amplifying the first signal. The bias circuit supplies a bias current to the amplifier transistor. The bias circuit includes first and second resistors and first and second transistors. The first transistor is connected in series with the first resistor and is turned ON by a first bias control voltage which is supplied when the first operation mode is used. The second transistor is connected in series with the second resistor and is turned ON by a second bias control voltage which is supplied when the second operation mode is used.
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公开(公告)号：US09735739B2
公开(公告)日：2017-08-15
申请号：US15380383
申请日：2016-12-15
发明人： Masao Kondo , Hidetoshi Matsumoto
CPC分类号： H03F1/0222 , H03F1/0227 , H03F1/0261 , H03F1/0277 , H03F3/19 , H03F3/211 , H03F3/245 , H03F2200/102 , H03F2200/105 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/451 , H03F2203/21131
摘要： A power amplifier module includes an amplifier transistor and a bias circuit. A first power supply voltage based on a first operation mode or a second power supply voltage based on a second operation mode is supplied to the amplifier transistor. The amplifier transistor receives a first signal and outputs a second signal obtained by amplifying the first signal. The bias circuit supplies a bias current to the amplifier transistor. The bias circuit includes first and second resistors and first and second transistors. The first transistor is connected in series with the first resistor and is turned ON by a first bias control voltage which is supplied when the first operation mode is used. The second transistor is connected in series with the second resistor and is turned ON by a second bias control voltage which is supplied when the second operation mode is used.
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公开(公告)号：US20150035607A1
公开(公告)日：2015-02-05
申请号：US14327779
申请日：2014-07-10
发明人： Kiichiro Takenaka , Masahiro Ito , Masakazu Hori , Mitsuo Ariie , Hayato Nakamura , Satoshi Arayashiki , Hidetoshi Matsumoto , Tsuyoshi Sato , Satoshi Tanaka
CPC分类号： H03F1/0222 , H03F1/02 , H03F1/0216 , H03F1/0261 , H03F1/32 , H03F1/42 , H03F1/52 , H03F1/56 , H03F3/04 , H03F3/19 , H03F3/21 , H03F2200/102 , H03F2200/408 , H03F2200/411 , H03F2200/444 , H03F2200/451 , H03G3/004
摘要： Improvement in linearity is achieved at low costs in a power amplifier module employing an envelope tracking system. The power amplifier module includes a first power amplifier circuit that amplifies a radio frequency signal and that outputs a first amplified signal, a second power amplifier circuit that amplifies the first amplified signal on the basis of a source voltage varying depending on amplitude of the radio frequency signal and that outputs a second amplified signal, and a matching circuit that includes first and second capacitors connected in series between the first and second power amplifier circuit and an inductor connected between a node between the first and second capacitors and a ground and that decreases a gain of the first power amplifier circuit as the source voltage of the second power amplifier circuit increases.
摘要翻译： 在采用包络跟踪系统的功率放大器模块中，以低成本实现线性度的改善。 功率放大器模块包括：放大射频信号并输出第一放大信号的第一功率放大器电路;第二功率放大器电路，其根据根据射频幅度变化的源电压放大第一放大信号 信号，并且输出第二放大信号，以及匹配电路，其包括串联连接在第一和第二功率放大器电路之间的第一和第二电容器以及连接在第一和第二电容器之间的节点与地之间的电感器， 随着第二功率放大器电路的源极电压的增加，第一功率放大器电路的增益增加。
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