| 摘要 |
<p>Disclosed is a switchable contactless smart card, characterized in that it includes a coil, a power storage capacitor, a power supply capacitor, a single-path electronic pump and an integrated circuit chip, wherein the power storage capacitor can be charged by the electromagnetic resonance generated from the coil, the power storage capacitor charges the power supply capacitor via the single-path electronic pump connected between the power storage capacitor and the power supply capacitor, and the power supply capacitor is used for supplying a working voltage for the integrated circuit chip; and it also includes an additional resistor connected to the power storage capacitor, the additional resistor being used for preventing the power storage capacitor from being charged under a specific condition.</p> |
