Auto-calibration for coreless current sensors

An auto-calibrating current sensor configured for calibration at a mounted position relative to a given conductor, the sensor comprising:

• a. a plurality of magnetic field sensing elements disposed at different locations within an integrated circuit (IC), respectively, and configured to produce a plurality of linearly independent magnetic field measurements of a magnetic field produced by a current carried by the conductor;
• b. memory comprising computer-executable instructions, wherein the computer-executable instructions include an electromagnetic model of the integrated circuit and the conductor, and wherein the model is operative to determine a magnetic field at points in space due to a given current in the conductor;
• and
• c. a processor coupled to the memory and operative to execute the computer-executable instructions, wherein, in response to executing the computer-executable instructions, the processor is configured to:
• receive the plurality of linearly independent magnetic field measurements from the plurality of magnetic field sensing elements;
• from the electromagnetic model, determine a plurality of coupling factors between the plurality of magnetic field sensing elements at their respective locations and the conductor, wherein each coupling factor is indicative of a magnitude of magnetic field measured per unit of current in the conductor;
• based on the plurality of coupling factors and plurality of linearly independent magnetic field measurements, calculate the current applied to the conductor;
• and
• based on the plurality of coupling factors and plurality of linearly independent magnetic field measurements, calculate the position of the integrated circuit at the mounted position relative to the conductor;
• wherein the current sensor is calibrated at the mounted position to determine current flowing in the conductor.