| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the width of variation in read height by receiving a signal by another sensor coil and processing the signal right after transmission from an X-axial coil or Y-axial coil is stopped, and detecting coordinate information of a position indicator on a tablet. SOLUTION: The signal from a transmitting circuit is connected to an X-axial coil selection switch and an X-axial coil X01 is selected. At this time, the X- axial coil X01 produces an alternating magnetic field upward. The X-axial coil selection switch selects an X-axial coil X03 and the signal generated by the X-axial coil X03 is sent to a receiving circuit, whose output is sent to a signal processing circuit. Further, transmission is performed by the X-axial coil X03 and reception is carried out by an X-axial coil 07. Thus, the receive signal obtained by another sensor coil right after the transmission from an X-axial coil or Y-axial coil is stopped is processed to detect the coordinate information of the position indicator on the tablet.</p> |
