MAGNETIC FIELD DETECTION SENSOR

摘要

PROBLEM TO BE SOLVED: To realize a method and a device for detecting a magnetic field, which is nonvolatile and has improved sensitivity and little dissipation of electric power. SOLUTION: The magnetic field detection sensor includes a first magnetic sensor (200) including a first sense layer (220) and a first reference layer (210). A second magnetic sensor (202) includes a second sense layer (222) and a second reference layer (212). The first magnetic sensor (200) is physically oriented relative to the second magnetic sensor (202) so that external magnetic fields detected by the magnetic field detection sensor cause a relative magnetic orientation of the first sense layer (220) to the first reference layer (210) to be opposite of a relative magnetic orientation of the second sense layer (222) to the second reference layer (212). A differential amplifier can senses the relative magnetic orientations of the first junction sensor and the second junction sensor. COPYRIGHT: (C)2004,JPO