Patent ID: 9720051
Date: 2017-08-01
CPC Classifications: G01R

Claim:
1. A sensor package comprising: a magnetic field sensor, said magnetic field sensor comprising in-plane sense elements located in a plane of said magnetic field sensor and configured to detect a magnetic field oriented perpendicular to said plane, wherein all of said in-plane sense elements are located within an area of said magnetic field sensor; a continuous coil structure surrounding said area occupied by said in-plane sense elements such that an entirety of said continuous coil structure is laterally displaced outside of said area; circuitry coupled to said continuous coil structure, said circuitry being configured to provide an electric current to said continuous coil structure to apply a self-test magnetic field to be sensed by said in-plane sense elements, wherein a vector component of said self-test magnetic field is oriented approximately perpendicular to said plane of said magnetic field sensor; and at least one flux guide configured to direct said vector component of said self-test magnetic field into said plane.