Patent ID: 8395383
Filing Date: 2013-03-12
Classification: G01R

Abstract:
1. A current sensor comprising: a magnetic detecting element, of which a resistance value is varied by application of an induced magnetic field from a current to be measured; a bridge circuit including a plurality of resistance elements having the magnetic detecting element, and connected to an input terminal, a ground terminal, and an output terminal; and a feedback coil placed adjacent to the magnetic detecting element, and generating a cancelling magnetic field for cancelling the induced magnetic field based on an output from the bridge circuit, wherein wiring patterns forming the bridge circuit are routed so as not to intersect with each other when seen in a plan view, one of the input terminal and the ground terminal is installed in a quantity of only one, and the other is installed in a quantity of two; only the resistance elements constituting each series circuit of the bridge circuit are connected to each other by the wiring pattern in an enclosed area which encloses each resistance element constituting the bridge circuit, and the wiring pattern branched from the wiring pattern is connected to the terminal which is installed in a quantity of only one, outside the enclosed area; and the wiring pattern connected to the terminals which are provided in a quantity of two, and the output terminal is installed outside the enclosed area.