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公开(公告)号：US20240333218A1
公开(公告)日：2024-10-03
申请号：US18619827
申请日：2024-03-28
Applicant: Huawei Technologies Co., Ltd.
CPC classification number: H03F1/0205 , H03F3/21 , H03F2200/102 , H03F2200/451 , H04B2001/045
Abstract: Embodiments of this application provide an envelope tracking modulator, comprising: a linear amplification circuit, a coupling capacitor, a buck circuit, a circuit sensor, and an offset current generation circuit. An output end of the linear amplification circuit is coupled to a first end of the coupling capacitor, and a second end of the coupling capacitor is coupled to a power supply node. The offset current generation circuit is coupled to the first end and the second end of the coupling capacitor, and the offset current generation circuit is further coupled to a control end of the buck circuit. An input end of the circuit sensor is coupled to a line between the output end of the linear amplification circuit and the first end of the coupling capacitor, and an output end of the circuit sensor is coupled to the control end of the buck circuit.
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公开(公告)号：US11063654B2
公开(公告)日：2021-07-13
申请号：US16845332
申请日：2020-04-10
Applicant: Huawei Technologies Co., Ltd.
Inventor： Weinan Li , Xiaoran Li , Jian Liang
Abstract: A diversity receiver and a terminal are provided. The diversity receiver includes a first main channel and a first diversity channel, the first main channel includes an antenna diplexer and a first main transmission channel, and the first diversity channel includes a tunable bandpass filter and a first diversity receiving channel. The first diversity receiving channel is coupled to a diversity antenna by using the tunable bandpass filter, and the tunable bandpass filter is configured to: adjust a passband bandwidth of the tunable bandpass filter according to a band bandwidth of a first transmit signal generated by the first main transmission channel and a band bandwidth of a first receive signal received from the diversity antenna, and perform bandpass filtering based on the passband bandwidth on the first receive signal.
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公开(公告)号：US20190173564A1
公开(公告)日：2019-06-06
申请号：US16267808
申请日：2019-02-05
Applicant: Huawei Technologies Co., Ltd.
Inventor： Weinan Li , Xiaoran Li , Jian Liang
Abstract: The present application discloses a diversity receiver and a terminal. The diversity receiver includes a first main channel and a first diversity channel, the first main channel includes an antenna diplexer and a first main transmission channel, and the first diversity channel includes a tunable bandpass filter and a first diversity receiving channel. The first diversity receiving channel is coupled to a diversity antenna by using the tunable bandpass filter, and the tunable bandpass filter is configured to: adjust a passband bandwidth of the tunable bandpass filter according to a band bandwidth of a first transmit signal generated by the first main transmission channel and a band bandwidth of a first receive signal received from the diversity antenna, and perform bandpass filtering based on the passband bandwidth on the first receive signal.
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4.发明公开公开(公告)号：US20240008774A1
公开(公告)日：2024-01-11
申请号：US18043992
申请日：2021-08-04
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yue Li , Jilong Ye , Weinan Li , Bin Yang , Wenjuan Chen
IPC: A61B5/1455 , A61B5/00
CPC classification number: A61B5/14551 , A61B5/681 , A61B5/6844 , A61B2562/0219
Abstract: This application provides a blood oxygen detection method with multiple photoelectric detectors connected in parallel. The method includes: An electronic device determines, based on a plurality of pieces of detection data, a category of a scenario in which the electronic device currently performs blood oxygen detection, where the detection data is used for describing whether detection currents output by corresponding photoelectric detectors are abnormal, or the detection data is used for describing a current wearing state of the electronic device; and determines, based on the scenario category, to perform calculation based on a detection current output by at least one of the multiple PDs to obtain oxygen saturation.
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公开(公告)号：US20230378980A1
公开(公告)日：2023-11-23
申请号：US18362377
申请日：2023-07-31
Applicant: Huawei Technologies Co., Ltd.
Inventor： Weinan Li , Weitao Jing , Po Shi
IPC: H04B1/00
CPC classification number: H04B1/0028 , H04B1/0067
Abstract: Embodiments of this application disclose a communication circuit, including: a shared radio frequency circuit, a baseband processing circuit, and an antenna. The antenna is configured to receive and send a first-mode signal and a second-mode signal. The shared radio frequency circuit is coupled between the baseband processing circuit and the antenna, and the shared radio frequency circuit is configured to process the first-mode signal and the second-mode signal in a time-division manner. The shared radio frequency circuit includes a slave control interface, and the baseband processing circuit includes a master control interface. The master control interface is coupled to the slave control interface by using a control bus, and is used for configuring the shared radio frequency circuit to process the first-mode signal and the second-mode signal in the time-division manner.
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Patent Agency Ranking
公开(公告)号：US20150312018A1
公开(公告)日：2015-10-29
申请号：US14695553
申请日：2015-04-24
Applicant: Huawei Technologies Co., Ltd.
Inventor： Weinan Li , Tao Liu , Jian Liang
CPC classification number: H04L5/1415 , H04B1/0057 , H04B1/0458 , H04B1/18 , H04L25/028 , H04W36/0055
Abstract: A radio frequency circuit. In the circuit, a first directional coupler receives a second transmit signal, uses a part of the second transmit signal as a third transmit signal, directly sends the third transmit signal to a first port of a circulator, and obtains a first coupling signal from the second transmit signal; the circulator outputs the third transmit signal through a second port; an impedance tuner transmits the third transmit signal to an antenna port and transmits, to the second port of the circulator, a first input signal from the antenna port; the circulator inputs the first input signal to a second directional coupler through a third port; the second directional coupler obtains a second coupling signal from the first input signal; and a controller adjusts impedance of the impedance tuner according to the first coupling signal and the second coupling signal.
Abstract translation: 射频电路。 在该电路中，第一定向耦合器接收第二发射信号，使用第二发射信号的一部分作为第三发射信号，将第三发射信号直接发送到循环器的第一端口，并从第 第二发射信号; 循环器通过第二端口输出第三发送信号; 阻抗调谐器将第三发送信号发送到天线端口，并向环行器的第二端口发送来自天线端口的第一输入信号; 循环器通过第三端口将第一输入信号输入到第二定向耦合器; 所述第二定向耦合器从所述第一输入信号获得第二耦合信号; 并且控制器根据第一耦合信号和第二耦合信号来调整阻抗调谐器的阻抗。
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公开(公告)号：US12212283B2
公开(公告)日：2025-01-28
申请号：US17733359
申请日：2022-04-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yongchang Yu , Min Yi , Weinan Li
Abstract: This application provides an operational amplifier and a start-up circuit of the operational amplifier. The start-up circuit has the advantages of having a simple structure and consuming less. The operational amplifier includes a multi-stage amplifier and a start-up circuit, where the start-up circuit includes a first start-up transistor and a second start-up transistor. A source of the first start-up transistor and a source of the second start-up transistor are connected to a tail bias node of a first-stage amplifier in the multi-stage amplifier, a gate of the first start-up transistor and a gate of the second start-up transistor are configured to connect to a first bias voltage Vb, and a drain of the first start-up transistor and a drain of the second start-up transistor are connected to input terminals of a second-stage or higher-stage amplifier.
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公开(公告)号：US20240364283A1
公开(公告)日：2024-10-31
申请号：US18758896
申请日：2024-06-28
Applicant: Huawei Technologies Co., Ltd.
Inventor： Wei Zhou , Yao Qian , Xiaojun Pan , Weinan Li
IPC: H03F3/24
CPC classification number: H03F3/245 , H03F2200/102 , H03F2200/451 , H03F2200/78
Abstract: A power amplifier power supply circuit includes a first power supply circuit and a second power supply circuit that are connected in parallel, where the first power supply circuit and the second power supply circuit jointly supply power to a power amplifier by using a power supply end of the power amplifier. The second power supply circuit is configured to adjust a power supply voltage of the power amplifier at a symbol level. Power supply voltages output by the second power supply circuit and the first power supply circuit change based on a change of an envelope signal output by the power amplifier.
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公开(公告)号：US20240056032A1
公开(公告)日：2024-02-15
申请号：US18496542
申请日：2023-10-27
Applicant: Huawei Technologies Co., Ltd.
CPC classification number: H03F1/0233 , H03F3/245 , H03F2200/105 , H03F2200/451
Abstract: In accordance with an embodiment, a power supply circuit configured to be coupled to a power amplifier that includes a driving-stage power amplifier and an output-stage power amplifier. The power amplifier is configured to amplify a power of a radio frequency signal, the driving-stage power amplifier is configured to receive the radio frequency signal, and the output-stage power amplifier is configured to receive a radio frequency signal amplified by the driving-stage power amplifier. The power supply circuit includes: a charge pump configured to supply power to the driving-stage power amplifier; and an envelope tracker configured to supply power to the output-stage power amplifier, wherein the charge pump and the envelope tracker are configured to supply power to the power amplifier.
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公开(公告)号：US09647630B2
公开(公告)日：2017-05-09
申请号：US14310603
申请日：2014-06-20
Applicant: Huawei Technologies Co., Ltd.
Inventor： Weinan Li , Tao Liu , Jian Liang
CPC classification number: H03H7/383 , H01Q1/242 , H01Q1/50 , H03H7/38 , H03H2007/386
Abstract: The present invention provides an antenna impedance matching apparatus, semiconductor chip, and method. The apparatus includes: a semiconductor chip, including multiple adjustable capacitors and multiple switches; and at least one impedance component, located outside the semiconductor chip, where the semiconductor chip is coupled to the at least one impedance component through multiple terminals and coupled to an input terminal and an output terminal of the antenna impedance matching apparatus, the input terminal and the output terminal of the antenna impedance matching apparatus are respectively coupled to a radio frequency circuit and an antenna, the multiple switches are configured to, under control of a control signal, switch a connection between the multiple adjustable capacitors and the at least one impedance component, and values of the multiple adjustable capacitors are adjusted by an adjustment signal, so as to tune impedance matching of the antenna.
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