| 摘要 |
A current sensor that may include a first winding; a second winding that is intertwined with the first winding; a feedback circuit that is coupled to the first and second winding and is arranged to sense an output voltage of the first winding and to provide a feedback voltage that nullifies a magnetic field within the first and second windings; and a current sensing circuit that is coupled to the second winding and is arranged to sense a second winding current that flows through the second winding; wherein when the current sensor is positioned within a sensing range of a line that conveys a line current, the second winding current is indicative of the line current. |
