Abstract: A position sensing apparatus that can be used with a compatible digitizing tablet to generate positional and rotational information. The apparatus contains two mutually perpendicular windings which are fed with AC waveforms on phase quadrature. The magnetic field generated by these windings is detected by the digitizing tablet. Alternatively, the perpendicular coils may be used to detect an externally generated magnetic field. A further winding can be added to give positional information. All windings can be arranged in a disclosed manner, and incorporated into a hand held system.