| 摘要 |
An electric current sensor which includes a pair of magnetic detectors arranged near a signal line, flowing through which is an electric current to be detected. Additionally, a differential amplifier is included for differentially amplifying two signals obtained by the paired magnetic detectors, detecting a magnetic field from the electric current flowing through the signal line, and outputting a detection signal for the detected electric current. The paired magnetic detectors are arranged adjacent to each other along a first straight line and sandwiching between them a second straight line. The first straight line is perpendicular to but spaced from the signal line, and the second straight line crosses perpendicularly to both the first straight line and the signal line. The paired magnetic detectors have the same magnetic field detecting direction, which may be parallel or inclined relative to the second straight line.
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