| 摘要 |
<p>PURPOSE:To eliminate a battery and to simplify constitution by converting an alternative current, which is impressed to a driving line group, to an alternative current magnetic field with a tuning circuit in a position indicator, impressing this alternative current magnetic field to a sense line and inducing the alternative current. CONSTITUTION:The alternative current, which is impressed through a driving circuit 2 to a driving line group 1, is converted to the alternative current magnetic field by a coil 31 of a position indicator 3 and a capacitor 32. This alternative current magnetic field is given to a sense line group 4 and the alternative current is induced to the sense line group 4. A control circuit 6 detects this induced current and executes prescribed arithmetic. Thus, the position of the position indicator is determined.</p> |
