Patent ID: 11892477
Assignee: TDK CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 10:
11. A current sensor, comprising:
a magneto-resistive effect element which is arranged near a current line, to which a signal magnetic field is applied, the signal magnetic field being induced by a current that flows in the current line, and which generates a magneto-resistive change in accordance with a change of the signal magnetic field;
cancelling magnetic field generating means that is provided near the magneto-resistive effect element and that generates a cancelling magnetic field that cancels the signal magnetic field;
first magnetic field intensity adjusting means that attenuates the signal magnetic field that is applied to the magneto-resistive effect element and that increases the cancelling magnetic field that is applied to the magneto-resistive effect element; and
second magnetic field intensity adjusting means that increases both the signal magnetic field and the cancelling magnetic field that are applied to the magneto-resistive effect element, wherein
a distance in a magnetization detecting direction between a center of the first magnetic field intensity adjusting means and a part of the second magnetic field intensity adjusting means that is most distant from the center of the first magnetic field intensity adjusting means is smaller than a distance in the magnetization detecting direction between the center of the first magnetic field intensity adjusting means and an end of the first magnetic field intensity adjusting means.