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：US20230238701A1

公开(公告)日：2023-07-27

申请号：US18193366

申请日：2023-03-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Keji CUI ,  Tianyu SHEN ,  Yongchang YU

IPC: H01Q5/50 ,  H03F1/56 ,  H03F1/26 ,  H03F3/24 ,  H01P5/19

CPC classification number: H01Q5/50 ,  H03F1/565 ,  H03F1/26 ,  H03F3/245 ,  H01P5/19 ,  H03F2200/222 ,  H03F2200/387 ,  H03F2200/451 ,  H03F2200/366

Abstract: Example multi-band phased array are described. One example multi-band phased array includes a plurality of branches coupled to a plurality of multi-band antennas. Each of the plurality of branches includes a low noise amplifier and a power amplifier. The power amplifier and the low noise amplifier are configured to transmit and receive, in a time-sharing manner, a signal of a first frequency band and a signal of a second frequency band that are received by the multi-band phased array, and the first frequency band and the second frequency band are different and do not overlap. Each of the plurality of branches further includes a phase shifter, where the phase shifter is configured to perform phase shifting on the signal of the first frequency band, and the phase shifter is further configured to perform phase shifting on the signal of the second frequency band.

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：US20250070816A1

公开(公告)日：2025-02-27

申请号：US18941454

申请日：2024-11-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Keji CUI ,  Peng GAO ,  Yongchang YU

IPC: H04B1/401 ,  H01P5/16

Abstract: The present disclosure relates to electronic devices and communication systems. One example electronic device includes a power divider array that includes a general input port and a plurality of branch output ports. The power divider array has a filter mode and a power splitter mode that are switchable. In the power splitter mode, the power divider array is configured to implement power distribution of a signal from the general input port to the plurality of branch output ports. In the filter mode, the power divider array is configured to filter a signal transmitted between the general input port and the plurality of branch output ports.

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.