Patent ID: 6232776
Filing Date: 2001-05-15
Classification: G01R,Y10S

Abstract:
A magnetic field sensor for producing an output voltage that is proportional to the amplitude of an incident magnetic field in a sensor plane, the magnetic field sensor comprising:a first leg having a first end and a second end, said first leg including one or more first circular shaped elements provided in the sensor plane, selected ones of the first circular shaped elements are formed from an isotropic magnetoresistive material, the first end of said first leg is connected to a first power supply terminal;a second leg having a first end and a second end, wherein the first end is connected to a second power supply terminal;a third leg having a first end and a second end, wherein the first end is connected to a third power supply terminal, and the second end is connected to the second end of the first leg;a fourth leg having a first end and a second end, said fourth leg including one or more second circular shaped elements provided in the sensor plane, selected ones of the second circular shaped elements are formed from an isotropic magnetoresistive material, the first end of the fourth leg is connected to a fourth power supply terminal, and the second end of said fourth leg is connected to the second end of the second leg;whereby an output voltage is produced between the second end of the first leg and the second end of the second leg that is proportional to the applied magnetic field in the sensor plane and independent of the direction of the magnetic field in the sensor plane.