| 摘要 |
<p>There has been problems of deterioration of performance, accuracy and the like of circuits mounted inside other than a noncontact type electronic device, due to heat generated by the noncontact type electronic device by excessive power supplied thereto. A capacitor (C1) and a capacitor (C2) are connected in series to the terminals on the both sides of an antenna (L0) mounted on the noncontact type electronic device (B1), a charge/discharge control circuit (B14) is connected to the contact point of the capacitor (C1) and the capacitor (C2), the resonance frequency is controlled by changing the charges accumulated in the capacitor (C1) and the capacitor (C2), and excessive power supply is suppressed.</p> |
