Patent ID: 7915885

Claim:
A magnetic sensing system, comprising: a conductor having a current flow path; the conductor having a first location defining a first cross-sectional area and a second location defining a second cross-sectional area, wherein a current flowing through the conductor establishes magnetic field lines having strengths that vary according to the conductor cross-sectional area; and a plurality of sensors including a first sensor situated proximate the first location and a second sensor situated proximate the second location, the sensors being configured to measure the magnetic field lines at their respective locations; wherein the sensors are arranged in respective pairs that form legs of a bridge circuit and wherein a first one of the pairs of sensors is situated at a location where the value of the magnetic field lines is at a maximum; a second one of the pairs of sensors is situated at a location where the value of the magnetic field lines is at a minimum; and third and fourth ones of the pairs of sensors are situated at locations where the value of the magnetic field lines are greater than the minimum and less than the maximum, and the third and fourth ones of the pairs of sensors are situated at locations approximately equidistant from a location where the magnetic field lines are zero.