Patent ID: 7309980

Claim:
A current sensing device for detecting current flow in a conductor comprising: a magnetic core in linking relationship with the conductor, whereby the flow of current in the conductor produces magnetic flux in the core; a magneto-electric converter and a secondary winding being linked by the magnetic flux in the magnetic core with the magneto-electric converter disposed within the magnetic core in a plane substantially perpendicular to the magnetic flux and generating an output responsive to the magnetic flux in the magnetic core that is coupled to an amplifier generating at least a DC output representative of the magneto-electric converter output, and the secondary winding having one end coupled to a ground reference responsive to the magnetic flux in the magnetic core for producing an alternating current output; a transimpedance amplifier having an inverting input coupled to receive the alternating current output from the secondary winding, a non-inverting input coupled to receive the output of the magneto-electric converter amplifier and an output coupled to the inverting input via a resistive current signal path wherein the resistive current signal path couples the alternating current in the secondary winding to the output of the transimpedance amplifier and couples a current representing the output the magneto-electric converter amplifier from the output of the transimpedance amplifier to the secondary winding.