| 摘要 |
<p>Provided is position-indicating device for indicating a position on a tablet by transmitting a transmission signal to the tablet upon receiving an electromagnetic wave transmitted from the tablet, the position-indicating device comprising:
- a resonance circuit (11; 60);
- power supply extraction means for extracting a power supply from an induction voltage to be induced across the resonant circuit, the power supply extraction circuit comprising a rectifying device (12; 61) and a charging capacitor (13; 63), the charging capacitor being charged when the induction voltage is greater than a first supply voltage across the charging capacitor;
- a transistor circuit (65);
- voltage conversion means (14,15; 63) for generating a second power supply having a voltage level lower than the first supply voltage,
wherein the transistor circuit is operated by the second power supply.</p> |
