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公开(公告)号：US11128271B2
公开(公告)日：2021-09-21
申请号：US16720308
申请日：2019-12-19
摘要： A power supply circuit supplies a variable voltage to a power amplifier that amplifies a radio-frequency signal, and includes a transistor and a current detecting resistor. The transistor includes a collector or drain that is supplied with a fixed voltage from a fixed voltage source, a base or gate that receives an envelope signal tracking an envelope of the radio-frequency signal, and an emitter or source that outputs the variable voltage that is based on the envelope signal. The current detecting resistor is electrically connected between the fixed voltage source and the collector or drain of the transistor.
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公开(公告)号：US20190068129A1
公开(公告)日：2019-02-28
申请号：US16111797
申请日：2018-08-24
CPC分类号： H03F1/26 , H03F1/0266 , H03F1/0288 , H03F3/19 , H03F3/191 , H03F3/245 , H03F2200/165 , H03F2200/18 , H03F2200/21 , H03F2200/372 , H03F2200/451
摘要： A power amplifier circuit includes a Doherty amplifier including a divider that divides a first signal into a second signal and a third signal, a carrier amplifier that amplifies the second signal and outputs a fourth signal, a peak amplifier that amplifies the third signal and outputs a fifth signal, a combiner that combines the fourth signal and the fifth signal and outputs an amplified signal of the first signal, a first bias circuit that supplies a first bias current or voltage to the carrier amplifier, and a second bias circuit that supplies a second bias current or voltage corresponding to a control signal to the peak amplifier; and a control circuit that supplies the control signal corresponding to a level of the second signal to the second bias circuit. The control circuit includes a detecting unit, an output unit, and a filter circuit.
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公开(公告)号：US09660589B2
公开(公告)日：2017-05-23
申请号：US15077124
申请日：2016-03-22
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：US20170047894A1
公开(公告)日：2017-02-16
申请号：US15251031
申请日：2016-08-30
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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公开(公告)号：US09461602B2
公开(公告)日：2016-10-04
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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公开(公告)号：US20150084698A1
公开(公告)日：2015-03-26
申请号：US14552597
申请日：2014-11-25
CPC分类号： H03F1/0205 , H03F1/02 , H03F1/0227 , H03F1/32 , H03F1/3223 , H03F1/56 , H03F3/193 , H03F3/195 , H03F3/213 , H03F3/245 , H03F2200/18 , H03F2200/222 , H03F2200/318 , H03F2200/372 , H03F2200/387 , H03F2200/411 , H03F2200/451
摘要： Linearity and power efficiency in a power amplifier circuit are enhanced. The power amplifier circuit includes a first transistor that amplifies a signal input to the base and that outputs the amplified signal from the collector and a first capacitor that is disposed between the base and the collector of the first transistor and that has voltage dependency of a capacitance value lower than that of a base-collector parasitic capacitance value of the first transistor.
摘要翻译： 增强了功率放大器电路中的线性和功率效率。 功率放大器电路包括：第一晶体管，其放大输入到基极的信号并输出来自集电极的放大信号;以及第一电容器，其设置在第一晶体管的基极和集电极之间，并且具有电容的电压依赖性 的值低于第一晶体管的基极 - 集电极寄生电容值的值。
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公开(公告)号：US11101773B2
公开(公告)日：2021-08-24
申请号：US16789827
申请日：2020-02-13
发明人： Masao Kondo , Hidetoshi Matsumoto
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：US10090806B2
公开(公告)日：2018-10-02
申请号：US15674696
申请日：2017-08-11
发明人： Tsuyoshi Sato , Hidetoshi Matsumoto
摘要： The power amplifier circuit includes a first amplifier that amplifies a first signal and outputs a second signal, a second amplifier that amplifies the second signal and outputs a third signal, a power supply terminal that receives supply of a power supply voltage that varies as a function of an amplitude of the first signal, a first power supply line that supplies the power supply voltage from the power supply terminal to the first amplifier, a second power supply line that supplies the power supply voltage from the power supply terminal to the second amplifier, and a first delay circuit provided in the second power supply line.
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公开(公告)号：US10020779B2
公开(公告)日：2018-07-10
申请号：US15251031
申请日：2016-08-30
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： H03F3/191 , H03F1/02 , H03F3/21 , H03F1/32 , H03F1/52 , H03F3/19 , H03F1/56 , H03G3/00 , H03F1/42 , H03F3/04
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：US20180062578A1
公开(公告)日：2018-03-01
申请号：US15674696
申请日：2017-08-11
发明人： Tsuyoshi Sato , Hidetoshi Matsumoto
CPC分类号： H03F1/02 , H03F1/0222 , H03F1/32 , H03F3/19 , H03F3/245 , H03F2200/102 , H03F2200/165 , H03F2200/411 , H03F2200/451 , H04B1/04 , H04B1/16 , H04B2001/0408
摘要： The power amplifier circuit includes a first amplifier that amplifies a first signal and outputs a second signal, a second amplifier that amplifies the second signal and outputs a third signal, a power supply terminal that receives supply of a power supply voltage that varies as a function of an amplitude of the first signal, a first power supply line that supplies the power supply voltage from the power supply terminal to the first amplifier, a second power supply line that supplies the power supply voltage from the power supply terminal to the second amplifier, and a first delay circuit provided in the second power supply line.
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