公开(公告)号：US11092656B2

公开(公告)日：2021-08-17

申请号：US14975777

申请日：2015-12-19

Applicant: Texas Instruments Incorporated

Inventor： Martijn F. Snoeij ,  Viola Schäffer

IPC: G01R33/00 ,  G01R33/04

Abstract: A circuit and method for magnetic field detection is disclosed. A fluxgate sensor comprises a fluxgate having a first core and a second core. A sense coil has a first winding around the first fluxgate core and a second winding around the second fluxgate core. A fluxgate detection circuit is coupled to the sense coil and outputs a signal proportional to an external magnetic field applied to the fluxgate. A detection circuit is coupled to the first winding and outputs a signal that indicates whether voltage pulses have been detected on the first winding.

公开(公告)号：US10459040B2

公开(公告)日：2019-10-29

申请号：US15162776

申请日：2016-05-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Martijn Fridus Snoeij ,  Viola Schäffer ,  Gebhard Haug

IPC: G01R33/022 ,  G01R33/04

Abstract: An integrated fluxgate magnetic gradient sensor includes a common mode sensitive fluxgate magnetometer and a differential mode sensitive fluxgate magnetometer. The common mode sensitive fluxgate magnetometer includes a first core adjacent to a second core. The first and second cores are wrapped by a first excitation wire coil configured to receive an excitation current that affects a differential mode magnetic field. The differential mode sensitive fluxgate magnetometer includes a third core adjacent to the first core and a fourth core adjacent to the second core. The third and fourth cores are wrapped by a second excitation wire coil configured to receive an excitation current that affects a common mode magnetic field.