发明名称 |
Kontaktloses Datenträger-System |
摘要 |
A non-contact data carrier includes a battery (29), an electric-supply circuit (4) for rectifying a received carrier signal and generating power, and an electric-supply switching circuit (9) for comparing the voltage of the battery and the voltage generated by the electric-supply circuit and selecting either one of the voltages. When the battery (29) can supply power, long-distance communication can be performed by supplying power from the battery. In case of battery exhaustion, power is supplied from the electric-supply circuit (4) which receives a stronger carrier signal by using the non-contact IC card in the proximity of a question unit and rectifies the carrier signal, so that the function of the non-contact data carrier is maintained. <IMAGE> |
申请公布号 |
DE69812215(T2) |
申请公布日期 |
2004.03.04 |
申请号 |
DE1998612215T |
申请日期 |
1998.04.28 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
IIYAMA, KEIICHI;ASAKA, NOBUYOSHI |
分类号 |
B60R25/04;G06K7/00;G06K19/07;G07C9/00;(IPC1-7):G06K7/08 |
主分类号 |
B60R25/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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