US Patent 10557873 Systems and methods for closed loop current sensing

A current sensor for sensing a direct magnetic field generated by a current through a conductor includes at least one first magnetic field sensing element spaced from at least one second magnetic field sensing element, with the magnetic field sensing elements configured to sense the direct magnetic field at different magnitudes. The direct magnetic field has a first direct coupling factor with respect to the at least one first magnetic field sensing element and a second direct coupling factor with respect to the at least one second magnetic field sensing element. A feedback conductor configured to carry a feedback current generates a feedback magnetic field that has a first feedback coupling factor with respect to the at least one first magnetic field sensing element and a second feedback coupling factor with respect to the at least one second magnetic field sensing element. A circuit generates the feedback current based on the direct and feedback magnetic fields and a sense element senses the feedback current.