Patent ID: 8952687
Filing Date: 2015-02-10
Classification: G01R

Abstract:
1. A current sensor comprising: a conductive member through which a current to be measured flows, the conductive member having a cross-sectional shape extending in a first direction longer than in a second direction; a substrate having a first surface and a second surface substantially parallel to the first direction; a first magnetic sensor and a second magnetic sensor disposed on the first surface and the second surface, respectively, the first and second magnetic sensors being configured to output first and second output signals, respectively, due to an induction magnetic field applied thereto from the current to be measured, the first and second output signals having respective phases opposite to each other; and a differential amplifier configured to obtain a differential value between the first output signal and the second output signal, wherein the first magnetic sensor and the second magnetic sensor have a first sensing axis and a second sensing axis, respectively, both fixed in a same sensing axis direction, the direction of the first sensing axis forming a predetermined angle with respect to a direction of the induction magnetic field applied to the first magnetic sensor, and a reverse direction of the second sensing axis forming an angle substantially same as the predetermined angle with respect to a direction of the induction magnetic field applied to the second magnetic sensor.