公开(公告)号：US20140375523A1

公开(公告)日：2014-12-25

申请号：US14310603

申请日：2014-06-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Weinan LI ,  Tao LIU ,  Jian LIANG

IPC: H03H7/38 ,  H01Q1/50

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.

Abstract translation: 本发明提供一种天线阻抗匹配装置，半导体芯片和方法。 该装置包括：半导体芯片，包括多个可调电容器和多个开关; 以及位于半导体芯片外部的至少一个阻抗分量，其中所述半导体芯片通过多个端子耦合到所述至少一个阻抗分量，并耦合到所述天线阻抗匹配装置的输入端子和输出端子，所述输入端子和 天线阻抗匹配装置的输出端分别耦合到射频电路和天线，多个开关被配置为在控制信号的控制下切换多个可调电容器与至少一个阻抗分量之间的连接 ，并且通过调整信号调整多个可调电容器的值，以便调整天线的阻抗匹配。

公开(公告)号：US20230389832A1

公开(公告)日：2023-12-07

申请号：US18250028

申请日：2021-09-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jing LI ,  Kun WANG ,  Weinan LI ,  Zhongwei LIN ,  Jilong YE

IPC: A61B5/145 ,  A61B5/024 ,  A61B5/00

CPC classification number: A61B5/14542 ,  A61B5/02433 ,  A61B5/02438 ,  A61B5/4809

Abstract: A method for periodically measuring blood oxygen saturation is disclosed. The electronic device includes a red light R path and an infrared light IR path, and the R path and the IR path each include a light emitting source and a photoelectric detector. The method includes: The electronic device receives a first instruction indicating to periodically measure blood oxygen saturation; performs, in response to the first instruction, dimming in a first blood oxygen measurement period if a user changes from a non-sleep state to a sleep state, where the dimming is used to determine that a light emitting power of the light emitting source of the R path and a light emitting power of the light emitting source of the IR path are respectively a first power and a second power.

公开(公告)号：US20220294403A1

公开(公告)日：2022-09-15

申请号：US17828617

申请日：2022-05-31

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yongchang YU ,  Min YI ,  Weinan LI

IPC: H03F3/45

Abstract: This application provides an operational amplifier that increases the stability and settling speed of a common-mode feedback circuit. The operational amplifier includes N stages of amplifiers connected in series and M common-mode feedback circuits, where N and M are integers, N≥3, and N≥M>1. An ith common-mode feedback circuit in the M common-mode feedback circuits is configured to: detect a common-mode output voltage of a (j+b)th stage of amplifier, and regulate an electrical parameter of at least one of the jth stage of amplifier to the (j+b)th stage of amplifier, to stabilize the common-mode output voltage of the (j+b)th stage of amplifier. An Mth common-mode feedback circuit is configured to detect and stabilize a common-mode output voltage of an Nth stage of amplifier. Herein i, j, and b are integers, M≥i≥1, N≥j≥1, i≥j, j+b≤N, and b≥0.

公开(公告)号：US20200244341A1

公开(公告)日：2020-07-30

申请号：US16845332

申请日：2020-04-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Weinan LI ,  Xiaoran LI ,  Jian LIANG

IPC: H04B7/08 ,  H04B1/525 ,  H04B1/10

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.

公开(公告)号：US20150326207A1

公开(公告)日：2015-11-12

申请号：US14710244

申请日：2015-05-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yongchang YU ,  Tao LIU ,  Weinan LI

IPC: H03J5/14 ,  H03K17/687 ,  H03K17/60 ,  H04W88/00 ,  H04B1/04

CPC classification number: H03J5/14 ,  H03J2200/06 ,  H03K17/10 ,  H03K17/102 ,  H03K17/60 ,  H03K17/687 ,  H03K17/693 ,  H03K2217/0018 ,  H03K2217/0054 ,  H04B1/04 ,  H04W88/00

Abstract: A switch, an antenna tuner, and a radio frequency apparatus are provided. The switch includes: 2N successively serially connected transistors. In the 2N successively serially connected transistors, control ends of any two transistors with closest odd sequence numbers are coupled to each other through a first resistor, and control ends of any two transistors with closest even sequence numbers are coupled to each other through a second resistor; a control end of an n-th transistor is coupled to a first control signal in a switch control signal, and a control end of an (n+1)-th transistor is coupled to the first control signal, where n is an integer that is greater than or equal to 1 and is less than or equal to 2N−1, N is an integer greater than or equal to 2, and the first control signal is used to control turn-on or turn-off of the switch.

Abstract translation: 提供开关，天线调谐器和射频装置。 该开关包括：2N个连续串联的晶体管。 在2N个连续串联连接的晶体管中，具有最近奇数序列号的任何两个晶体管的控制端通过第一电阻彼此耦合，并且具有最靠近偶数序列号的任何两个晶体管的控制端通过第二电阻 ; 第n晶体管的控制端被耦合到开关控制信号中的第一控制信号，并且第（n + 1）晶体管的控制端耦合到第一控制信号，其中n是 大于或等于1且小于或等于2N-1，N是大于或等于2的整数，并且第一控制信号用于控制开关的导通或关断。

公开(公告)号：US20220263470A1

公开(公告)日：2022-08-18

申请号：US17733359

申请日：2022-04-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yongchang YU ,  Min YI ,  Weinan LI

IPC: H03F1/02 ,  H03F3/45

Abstract: This application provides an operational amplifier and a start-up circuit of the operational amplifier. The start-up circuit has advantages of simple structure and low power consumption. The operational amplifier includes a multi-stage amplifier and a start-up circuit, where the start-up circuit includes: a first start-up transistor M16 and a second start-up transistor M17, a source of the first start-up transistor M16 and a source of the second start-up transistor M17 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 M16 and a gate of the second start-up transistor M17 are configured to connect to a first bias voltage Vb, and a drain of the first start-up transistor M16 and a drain of the second start-up transistor M17 are connected to input terminals of a second-stage or higher-stage amplifier.