An amorphous magnetostrictive delayline cordless digitizer

A digitizer with a cordless cursor to input the coordinates of graphics is reported. The digitizer utilizes magnetostrictive delay lines made of iron-based amorphous ribbons. During the propagation of a magnetoelastic wave ion the ribbon, the output signal is generated by a solenoid coil wound through the entire ribbon length when the wave arrives at a position immediately underneath the cursor magnet. The resolution of the digitizer is +or-0.1 mm; the cursor position was still detectable even when placed 12 mm above the pad surface.