| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrostatic stylus pen including a lightweight and small-sized battery or capacitor as a power supply, for enabling information such as an indication position and a writing pressure to be accurately, stably obtained on a tablet. ! SOLUTION: An electrostatic stylus pen for inputting an instruction position to a tablet by capacitive coupling with the tablet, includes: a signal generation circuit generating a signal with the same frequency as a frequency of a signal transmitted from an electrode 13 provided on a position indication unit; a transformer 20 configured by winding a primary coil and a secondary coil around a magnetic material, for boosting the signal generated by the signal generation circuit; an analog switch 17 for controlling connection between one end of the secondary coil of this transformer 20 and the electrode 13 to an ON-state or an OFF-state; a power supply extraction circuit extracting power to be supplied to the analog switch 17 by an electromotive |
