发明名称 |
RFID TAG HAVING PARALLEL RESONANT CIRCUIT FOR MAGNETICALLY DECOUPLING TAG FROM ITS ENVIRONMENT |
摘要 |
An RFID tag circuit provides magnetic decoupling and amplitude modulation. T he circuit is made up of a first inductor and a second inductor connected in series, a first capacitor, a second capacitor, and a switch. The circuit includes a first resonant circuit formed from a parallel connection of the series connected first and second inductors, and the first capacitor. The first resonant circuit has a primary resonant frequency. The circuit also includes a second circuit formed from a series connection of the second capacitor and the switch. The series connection of the second capacitor and the switch are connected in parallel to the second inductor. One end of the series connected second capacitor and switch is connected to the common connection between the series connected first and second inductors.
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申请公布号 |
CA2349409(A1) |
申请公布日期 |
2000.05.11 |
申请号 |
CA19992349409 |
申请日期 |
1999.10.14 |
申请人 |
CHECKPOINT SYSTEMS, INC. |
发明人 |
INUI, SHINICHIRO;GALLAGHER, WILLIAM F., III |
分类号 |
G06K7/08;G06K17/00;G06K19/07;G08B13/22;H04B1/59;H04B5/02;(IPC1-7):H04Q1/00 |
主分类号 |
G06K7/08 |
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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