MAGNETIC FIELD DETECTOR, CURRENT DETECTOR, SEMICONDUCTOR INTEGRATED CIRCUIT, AND MAGNETIC FIELD DETECTION METHOD

摘要

PROBLEM TO BE SOLVED: To correct the offsets of magnetic field responses of detection elements by the use of reference elements used as constant resistance, thereby facilitating the control of a zero point output in a magnetic field detector.;SOLUTION: A magnetic field detector comprises: two or more detection elements 101, 102; two or more reference elements 111, 112; and a magnetic field applying wire 151 that applies bias magnetic fields to magnetization hard axis directions of free layers of the detection elements 101, 102 to correct offsets in magnetic field responses of the detection elements. The reference elements and the detection elements have structures that laminate fixed layers where magnetization directions are fixed and free layers where magnetization directions changes in accordance with external magnetic fields. The reference elements 111, 112 includes: a state that the magnetization directions of the fixed layers and the magnetization directions of the free layers in non-magnetic fields are in parallel with each other; and a state that they are in anti-parallel with each other. The detection elements 101, 102 have the magnetization directions of the fixed layers and the magnetization directions of the free layers in non-magnetic fields that are different from each other.;COPYRIGHT: (C)2014,JPO&INPIT