公开(公告)号：US20210167594A1

公开(公告)日：2021-06-03

申请号：US17051977

申请日：2018-05-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bo Xu ,  Chao Wang ,  Jie Dong ,  Yi Wang ,  Qiao Sun ,  Zhiyong Sun

IPC: H02H9/04 ,  H05K1/11

Abstract: A protection circuit and a printed circuit board (PCB) for a terminal camera includes, in a configuration for coupling with a voice control motor (VCM), a drive circuit, a first circuit, a second circuit, a first protection system, a second protection system, and a third protection system. The first circuit and the second circuit are choke inductors or choke circuits including choke inductors, and are configured to couple to two ends of the VCM. The first protection system, the second protection system, and the third protection system are coupled to other key positions of the circuits. The devices are arranged on a top layer of the PCB, and a plurality of layers of the PCB are configured to route a signal based on design requirements.