Pulse excitation of coil-less fluxgate

Coil-less fluxgate is a new kind of orthogonal fluxgate sensor. So far it has been excited by sine-wave current; 2^nd harmonic extraction has been used to process the output voltage. This method was useful to prove the working mode of the sensor; however it shows serious drawbacks. In this paper we will show that the coil-less fluxgate can be excited by pulses of current, with proper height and width. The output voltage is obtained integrating a portion of the positive and negative pulse by two boxcar averagers, then summing up the resulting voltages.