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公开(公告)号：US20190109565A1
公开(公告)日：2019-04-11
申请号：US16154861
申请日：2018-10-09
发明人： Hisanori NAMIE , Satoshi GOTO , Satoshi TANAKA
CPC分类号： H03F1/0222 , H03F1/0261 , H03F1/52 , H03F1/56 , H03F1/565 , H03F3/191 , H03F3/21 , H03F3/245 , H03F2200/411 , H03F2200/516
摘要： A power amplifier module includes a first power amplifier circuit configured to output a first amplified signal obtained by amplifying an input signal; a second power amplifier circuit configured to output a second amplified signal obtained by amplifying the first amplified signal; and a matching network connected between the first power amplifier circuit and the second power amplifier circuit. The matching network includes a first capacitor connected in series between the first power amplifier circuit and the second power amplifier circuit, a second capacitor connected in series between the first capacitor and the second power amplifier circuit, a first inductor connected between a point between the first capacitor and the second capacitor and a ground, and a second inductor connected in series between the first power amplifier circuit and the first capacitor.
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公开(公告)号：US20180351454A1
公开(公告)日：2018-12-06
申请号：US15993220
申请日：2018-05-30
CPC分类号： H02M3/156 , H03F1/0227 , H03F1/0238 , H03F3/195 , H03F3/24 , H03F3/245 , H03F3/45183 , H03F2200/411 , H03F2200/451 , H03F2200/516
摘要： Described herein are systems, architectures, circuits, devices, and methods for a DC-DC converter that dynamically adjusts a supply voltage to a power amplifier based on the number of resource blocks in a signal to be transmitted. The disclosed technologies estimate the number of resource blocks in a signal, generate a signal corresponding to the estimated number of resource blocks, and modify a supply voltage based on the generated signal. The disclosed DC-DC converters can be integrated into systems that employ power management strategies such as average power tracking (“APT”). In addition, the disclosed technologies can be used to improve existing APT-based systems.
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公开(公告)号：US20180323761A1
公开(公告)日：2018-11-08
申请号：US16033993
申请日：2018-07-12
发明人： Yusuke Shimamune
CPC分类号： H03F3/45475 , H03F1/0211 , H03F3/19 , H03F3/195 , H03F3/21 , H03F3/245 , H03F3/68 , H03F2200/312 , H03F2200/451 , H03F2200/516 , H03F2200/555
摘要： 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：US20180309412A1
公开(公告)日：2018-10-25
申请号：US16022135
申请日：2018-06-28
发明人： Kenichi SHIMAMOTO
CPC分类号： H03F1/303 , H03F1/0261 , H03F1/56 , H03F3/19 , H03F3/21 , H03F3/245 , H03F2200/222 , H03F2200/387 , H03F2200/411 , H03F2200/451 , H03F2200/516 , H03F2200/555
摘要： A power amplification circuit includes: a first amplification transistor, a first signal being input to a base or gate thereof and a second signal obtained by amplifying the first signal being output from a collector or drain thereof; and a first bias circuit that supplies a first bias current to the base or gate of the first amplification transistor. The first bias circuit includes a first transistor that outputs the first bias current from an emitter or source thereof, and a first control circuit that controls an electrical connection between the emitter or source of the first transistor and ground. The first control circuit includes a first resistance element and a first switch element, which are connected in series with each other. The first switch element is switched on in the case of a first power mode and is switched off in the case of a second power mode.
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公开(公告)号：US20180302043A1
公开(公告)日：2018-10-18
申请号：US15566370
申请日：2017-05-05
发明人： Songlin LIU
CPC分类号： H03F1/26 , G06F3/147 , G09G5/003 , G09G2330/02 , G09G2330/026 , G09G2330/027 , H03F1/303 , H03F3/213 , H03F3/245 , H03F3/72 , H03F2200/372 , H03F2200/516
摘要： This application provides a control circuit, a control method, and an electronic device the control circuit comprising: a first control sub-circuit configured to receive a first power supply signal from a first power supply sub-circuit in an electronic device that includes the control circuit and output a first control signal; a second control sub-circuit configured to receive a second power supply signal from a second power supply sub-circuit in the electronic device and output a second control signal under control of the first control signal, wherein the second control signal is used to control a functional sub-circuit in the electronic device to be disabled during power-on and power-off process of the electronic device.
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公开(公告)号：US20180248522A1
公开(公告)日：2018-08-30
申请号：US15691298
申请日：2017-08-30
发明人： Andrea Gambero , Davide Ugo Ghisu , Sandro Rossi
CPC分类号： H03F1/305 , H03F1/307 , H03F3/187 , H03F3/217 , H03F3/302 , H03F3/45475 , H03F3/72 , H03F2200/03 , H03F2200/297 , H03F2200/516 , H03F2203/30099 , H03F2203/30132 , H04R3/00
摘要： An operational amplifier including an input stage coupled to an input terminal, an output stage coupled to an output terminal, and a gain node between the input stage and the output stage. A bias current source is couplable to the input stage to supply a bias current thereto and a current mirror circuit mirrors the bias current toward the gain node and the output stage. A switch circuit includes a switch activatable to bring the gain node to a pre-bias voltage and a switch coupled to the output stage and switchable between a first state and a second state in which the output stage is active and non-active, respectively—. A further switch circuit is coupled to the output terminal and switchable between a first state and a second state in which the output stage is coupled to the output terminal and to a reference level, respectively.
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公开(公告)号：US20180152143A1
公开(公告)日：2018-05-31
申请号：US15821054
申请日：2017-11-22
发明人： Satoshi Tanaka , Masatoshi Hase , Yuri Honda , Kazuo Watanabe , Takashi Soga
CPC分类号： H03F1/0205 , H03F1/0261 , H03F1/22 , H03F1/56 , H03F1/565 , H03F3/195 , H03F3/213 , H03F2200/222 , H03F2200/387 , H03F2200/411 , H03F2200/451 , H03F2200/516
摘要： A power amplifier circuit includes a first transistor, a second transistor, a first bias circuit supplying a first bias current or voltage, a second bias circuit supplying a second bias current or voltage, a first inductor, and a first capacitor. A power supply voltage is supplied to a collector of the first transistor, and an emitter thereof is grounded. A radio frequency signal and the first bias current or voltage are supplied to a base of the first transistor. The power supply voltage is supplied to a collector of the second transistor, and an emitter thereof is connected to the collector of the first transistor via the first capacitor and is grounded via the first inductor. The second bias current or voltage is supplied to a base of the second transistor. An amplified radio frequency signal is output from the collector of the second transistor.
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公开(公告)号：US09973153B2
公开(公告)日：2018-05-15
申请号：US15361777
申请日：2016-11-28
发明人： Apostolos Samelis
CPC分类号： H03F1/56 , H03F1/0261 , H03F1/0277 , H03F1/486 , H03F1/565 , H03F3/195 , H03F3/245 , H03F3/72 , H03F2200/108 , H03F2200/111 , H03F2200/222 , H03F2200/318 , H03F2200/36 , H03F2200/387 , H03F2200/391 , H03F2200/402 , H03F2200/411 , H03F2200/414 , H03F2200/421 , H03F2200/451 , H03F2200/516 , H03F2203/7221 , H03F2203/7236 , H04B1/006 , H04B1/44
摘要： Disclosed are systems, devices, and methodologies to reduce harmonics in a radio frequency output signal. A power amplifier system comprises a power amplifier and a tunable output matching network electrically connected between the output of the power amplifier and an output of the tunable output matching network. The tunable output matching network reduces second-order harmonics in an amplified radio frequency signal when the power amplifier operates in a low frequency mode. The tunable output matching network includes traps such as a series inductor and a first capacitor in series with a first switch, a second capacitor in series with a second switch, and a third capacitor in series with a third switch, where the traps are tuned to selected harmonic frequencies when the power amplifier operates in the low frequency band of the operating band of frequencies.
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公开(公告)号：US09966920B2
公开(公告)日：2018-05-08
申请号：US15413544
申请日：2017-01-24
发明人： Chun-Hsiung Chang
CPC分类号： H03G3/3042 , H03F1/0216 , H03F3/19 , H03F3/21 , H03F2200/405 , H03F2200/451 , H03F2200/516
摘要： A power amplifier circuit includes a power supply module and serially connected multi-stages of amplifier circuit. The multi-stages of amplifier circuit, coupled to the power supply module for amplifying an radio frequency (RF) input signal as an RF output signal, which include a driver stage of circuit and a gain stage of circuit. The driver stage of circuit receives and amplifies the RF input signal. The driver stage of circuit is powered by a first supply voltage received from the power supply module. The gain stage of circuit amplifies the signal received from previous stage of amplifier circuit and outputs the RF output signal. The gain stage of circuit is powered by a second supply voltage received from the power supply module. When the power amplifier circuit is operated in a back-off region, the first supply voltage is lower than the second supply voltage.
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公开(公告)号：US20180041169A1
公开(公告)日：2018-02-08
申请号：US15684258
申请日：2017-08-23
发明人： Kazuma Sugiura , Takashi Yamada , Norio Hayashi , Satoshi Tanaka , Kenichi Shimamoto , Kazuo Watanabe
CPC分类号： H03F1/0205 , H03F1/0222 , H03F3/19 , H03F3/211 , H03F3/245 , H03F2200/451 , H03F2200/516 , H03F2200/555
摘要： A power amplifier has improved power added efficiency at high output power. The power amplifier includes: a first transistor for amplifying an input signal input to the base thereof and outputting the amplified signal from the collector thereof; a second transistor with power-supply voltage applied to the collector thereof to supply bias voltage or bias current from the emitter thereof to the base of the first transistor; a third transistor whose collector is connected to the collector of the first transistor to amplify the input signal input to the base thereof and output the amplified signal from a collector thereof; a fourth transistor whose base and collector are connected to supply bias from the emitter thereof to the base of the third transistor; and a first resistor with bias control voltage applied to one end thereof and the other end connected to the bases of the second and fourth transistors.
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