Patent ID: 8451003
Filing Date: 2013-05-28
Classification: G01D,G01R

Abstract:
1. A magnetic sensor comprising a bridge circuit including first to fourth magneto-resistive elements arranged on a substrate so as to surround a central region, wherein one end of the first magneto-resistive element and one end of the second magneto-resistive element are connected to each other through a first connecting portion linearly extending in the central region positioned between the first magneto-resistive element and the second magneto-resistive element, one end of the third magneto-resistive element and one end of the fourth magneto-resistive element are linearly extended and connected to each other through a second connecting portion that crosses the first connecting portion in the central region positioned between the third magneto-resistive element and the fourth magneto-resistive element, other end of the first magneto-resistive element is connected to other end of the fourth magneto-resistive element through a third connecting portion, other end of the second magneto-resistive element is connected to other end of the third magneto-resistive element through a fourth connecting portion, resistance values of the first and third magneto-resistive elements change in a same increasing or decreasing direction depending on a change of an external signal magnetic field, and resistance values of the second and fourth magneto-resistive elements change in a increasing or decreasing direction opposite to that of the first and third magneto-resistive elements depending on the change of the signal magnetic field.