公开(公告)号：US20230027340A1

公开(公告)日：2023-01-26

申请号：US17789011

申请日：2020-12-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hsiang Hui CHANG ,  Daiping TANG ,  Feiyang HU

IPC: H04B1/04 ,  H03F3/68 ,  H04B1/40 ,  H03F1/06

Abstract: A power supply circuit in a wireless communications system includes an envelope tracking modulator coupled to a first power amplifier circuit and a second power amplifier circuit, so that the power supply circuit supplies power to the first power amplifier circuit and the second power amplifier circuit. When a transmit signal output by a processor is within a first bandwidth range, the power supply circuit supplies power to the first power amplifier circuit, and the first power amplifier circuit amplifies power of the transmit signal. When the transmit signal output by the processor meets a second bandwidth range, the power supply circuit supplies power to the second power amplifier circuit, and the second power amplifier circuit amplifies the transmit signal.

公开(公告)号：US20220022320A1

公开(公告)日：2022-01-20

申请号：US17487988

申请日：2021-09-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hui WANG ,  Dan QIU ,  Zhijun CHEN ,  Daiping TANG

IPC: H05K1/14 ,  H05K1/11 ,  H05K5/00

Abstract: An circuit board assembly includes a first circuit board, a second circuit board stacked with the first circuit board, and a connection plate connected between the first circuit board and the second circuit board. The connection plate includes a signal transmission part and at least one ground part at a spacing to the signal transmission part. The ground part can be used as a reference ground for a signal transmitted by the signal transmission part, so that the characteristic impedance of the signal transmission part is controllable, and the signal transmitted by the signal transmission part has strong continuity, thereby maintaining good matching performance and reducing an insertion loss caused by characteristic impedance mismatch.

公开(公告)号：US20210014971A1

公开(公告)日：2021-01-14

申请号：US16980174

申请日：2018-03-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hui WANG ,  Dan QIU ,  Zhijun CHEN ,  Daiping TANG

IPC: H05K1/14 ,  H05K5/00 ,  H05K1/11

Abstract: An electronic device includes a first circuit board, a second circuit board stacked with the first circuit board, and a connection plate connected between the first circuit board and the second circuit board. The connection plate includes a signal transmission part and at least one ground part at a spacing to the signal transmission part. The ground part can be used as a reference ground for a signal transmitted by the signal transmission part, so that the characteristic impedance of the signal transmission part is controllable, and the signal transmitted by the signal transmission part has strong continuity, thereby maintaining good matching performance and reducing an insertion loss caused by characteristic impedance mismatch.