Patent ID: 8193805
Filing Date: 2012-06-05
Classification: G01R,Y10T

Abstract:
1. A magnetic sensor comprising: a bridge circuit including a plurality of magneto resistive effect elements connected with each other, the bridge circuit being capable of detecting a differential voltage between predetermined connecting points, the magneto resistive effect elements outputting resistance values which vary in accordance with a direction of a magnetic field to be input and being arranged such that fixed magnetization directions of the magneto resistive effect elements are in the same direction; and one or more magnetic bodies arranged in the vicinity of the bridge circuit and changing the direction of the magnetic field to be input to the magneto resistive effect elements, wherein the bridge circuit includes four magneto resistive effect elements, wherein two element forming regions, in each of which a pair of the magneto resistive effect elements not adjacently-connected with each other in the bridge circuit are formed in almost the same area, are provided corresponding to respective pairs of the magneto resistive effect elements, and wherein either (a) the magnetic body is arranged between the two element forming regions, or (b) a plurality of magnetic bodies are respectively provided on an opposite side of one of the element forming regions with respect to the other element forming region, and on an opposite side of the other element forming region with respect to the one element forming region.