公开(公告)号：US09958480B2

公开(公告)日：2018-05-01

申请号：US14618343

申请日：2015-02-10

Applicant: QUALCOMM Incorporated

Inventor： Saeed Nejatali ,  Francesco Carobolante ,  Linda Stacey Irish ,  Cody Wheeland ,  Greg Bachmanek

IPC: G01R19/00 ,  G01R15/20 ,  G01R15/18 ,  H02J7/02 ,  H02J7/04 ,  H02J50/12 ,  G01R33/00 ,  H04B5/00

CPC classification number: G01R15/20 ,  G01R15/181 ,  G01R19/0092 ,  G01R33/0076 ,  H02J7/025 ,  H02J7/04 ,  H02J50/12 ,  H04B5/0037 ,  H04B5/0081

Abstract: Disclosed is a current sensor that senses current flow in a conductor by coupling a first magnetic field generated by the conductor to a sense element. The current sensor includes a shield including a first material that sandwiches the sense element to define a stack and a second material that sandwiches the stack. The shield is configured to generate a second magnetic field, responsive to a third magnetic field external to the current sensor that opposes the third magnetic field. The shield is further configured to prevent production of a magnetic field that opposes the first magnetic field generated by the flow of current in the conductor.