| abstract |
A fluxgate sensor integrated in a printed circuit board. The fluxgatensensor has soft magnetic cores having a lower core and an upper core mountednon the lower core, for forming a closed magnetic path on a printed circuitnboard, an excitation coil formed as a metal film, alternately winding the uppernand the lower soft magnetic cores substantially in a number '8' pattern, and anpick-up coil formed as a metal film, having a structure of winding the uppernand the lower soft magnetic cores substantially in a solenoid pattern, the pick-upncoil being placed on the same plane as an external contour of the excitationncoil. The fluxgate sensor integrated in the printed circuit board can be mass-producednat a cheap manufacturing cost. The fluxgate sensor also can benmade compact-sized, and at the same time, is capable of forming a closed-magneticnpath. As a result, flux leakage is minimized, and the fluxgate sensornhas a high sensitivity as it detects the magnetic field through a variable driving. |