| abstract |
A fluxgate sensor is integrated in a printed circuit board. The fluxgatensensor has two bar-type(or rectangular-ring shaped) soft magnetic cores tonform a closed magnetic path on a printed circuit board and an excitation coil innthe form of a metal film is wound around the two bar-type soft magnetic coresneither in a united structure that winds the two bar-type soft magnetic coresnaltogether, or in a separated structure that winds the two bar-type softnmagnetic cores respectively, both in a pattern of number '8'. A pick-up coil isnmounted on the excitation coil, either winding the two bars altogether, ornrespectively, in a solenoid pattern. The fluxgate sensor integrated in thenprinted circuit board can be mass-produced at a cheap manufacturing cost.nThe fluxgate sensor also can be made compact-sized, and at the same time, isncapable of forming a closed-magnetic path. As a result, flux leakage isnminimized, and the fluxgate sensor has a high sensitivity as it detects thenmagnetic field through a variable driving. |