公开(公告)号：US20130257543A1

公开(公告)日：2013-10-03

申请号：US13904822

申请日：2013-05-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lunchen XIE ,  Xiang WEI ,  Hua WANG

IPC: H02H9/04

CPC classification number: H02H9/043 ,  H03F1/52 ,  H03F3/19 ,  H03F3/245 ,  H03F3/72 ,  H03F2200/426 ,  H03F2200/444 ,  H03F2200/78

Abstract: Embodiments of the present application disclose a power amplifier protection circuit, communication device, and method, to protect a power amplifier when an abnormal signal, such as a bun or a pulse, occurs in a circuit. The method according to an embodiment of the present application comprises: detecting and comparing, by an input detection circuit, an abnormal signal in an input signal, outputting a protection control signal, and after processing performed by a delay circuit, controlling a power amplifier to be in an off state in a pulse width of the delayed protection control signal, so that the abnormal signal passes through the power amplifier when the power amplifier is in the off state, thereby preventing the power amplifier from burning, and achieving the effect of protecting the power amplifier.

Abstract translation: 本申请的实施例公开了一种功率放大器保护电路，通信装置和方法，用于在电路中发生异常信号（例如馒头或脉冲）时保护功率放大器。 根据本申请的实施例的方法包括：通过输入检测电路检测和比较输入信号中的异常信号，输出保护控制信号，以及在由延迟电路执行的处理之后，将功率放大器控制为 在延迟保护控制信号的脉冲宽度处于断开状态，使得当功率放大器处于关闭状态时异常信号通过功率放大器，从而防止功率放大器燃烧，并达到保护的效果 功率放大器。

公开(公告)号：US20190326881A1

公开(公告)日：2019-10-24

申请号：US16502932

申请日：2019-07-03

Applicant: Huawei Technologies Co., Ltd.

Inventor： Arto Turo Ilmari NURMELA ,  Jian GU ,  Xiang WEI

IPC: H03H9/17 ,  H03H9/13

Abstract: Disclosed is a Bragg mirror, a resonator and a filter device comprised thereof. The Bragg mirror comprises a stack of plurality of layers arranged in an axial direction (A), wherein the plurality of layers comprises at least one first layer (L1) comprising, in a radial direction (r), a first material (M1) and a second material (M2), wherein the first material (M1) is a first metal and the second material (M2) is a different material with respect to the first material (M1), and wherein the first material (M1) is radially embedded by the second material (M2) in the first layer (L1), or vice versa. The resonator comprises a top electrode, a bottom electrode, a piezo electric layer arranged between the top electrode and the bottom electrode, a substrate, and a Bragg mirror arranged between the bottom electrode and the substrate.