Patent ID: 7348772
Filing Date: 2008-03-25
Classification: G01R,H05K

Abstract:
1. A Printed Circuit Board (PCB) having a weak magnetic field sensor, comprising: a base plate with a first side and a second side, each side being formed with a first excitation circuit and a first detection circuit; first and second soft magnetic core bodies laminated on said first side and said second side, respectively, each magnetic core body being formed of a plurality of soft magnetic cores; and first and second outer layers laminated on said first and second soft magnetic core bodies, respectively, each of said first and second outer layers having a second excitation circuit and a second detection circuit, each second excitation and detection circuit being connected to a respective first excitation circuit and first detection circuit on said base, to surround the first and second soft magnetic cores, respectively; wherein the soft magnetic cores, the excitation circuits and the detection circuits formed on the first side of the base plate, and the soft magnetic cores, the excitation circuits and the detection circuits formed on the second side of the base plate are perpendicular to each other, respectively.