CURRENT SENSORS

摘要

Embodiments relate to magnetic field current sensors having sensor elements for sensing at least two magnetic field components, for example Bx and By. The current in a conductor is estimated by Bx and Bx/By, wherein Bx is the primary measurement and Bx/By is a corrective term used to account for position tolerances between the sensor and the conductor. In other embodiments, the corrective term can be dBx/By, where dBx is a difference in between components sensed at different sensor elements. The particular field components can vary in embodiments; for example, the current can be estimated by By and By/Bx, or dBy/Bx or some other arrangement.

主权项

1. A current sensor for sensing current flow in a conductor comprising:
a semiconductor die; at least one magnetic field sensor element arranged on the semiconductor die and sensitive to a magnetic field in a first direction; at least two magnetic field sensor elements arranged on the semiconductor die and each sensitive to a magnetic field in a second direction different from the first direction; and such that the current flow in the conductor can be estimated from the magnetic fields in the second direction and the magnetic field in the first direction.