Method and system for storage and recovery of vital information on radio frequency transponders
    4.
    发明授权
    Method and system for storage and recovery of vital information on radio frequency transponders 有权
    用于存储和恢复射频应答器重要信息的方法和系统

    公开(公告)号:US06404325B1

    公开(公告)日:2002-06-11

    申请号:US09330786

    申请日:1999-06-11

    IPC分类号: H04Q100

    摘要: The present invention assures the integrity of state information retained by a Radio Frequency Transponder during a loss of power. During the regular operation of the Transponder power is provided to a voltage-storing device powering an information retention mechanism of the Transponder. After the loss and reestablishing of power to the Transponder but before the Transponder is restarted, the voltage-storing device is checked to determine whether sufficient power is present in the information retention mechanism to retain information without corruption. If sufficient power is present, a signal to indicate that fact is communicated to the Transponder and the stored information is restored. The Transponder is then restarted.

    摘要翻译: 本发明确保在功率损失期间由射频应答器保留的状态信息的完整性。 在应答器的正常操作期间,将功率提供给为应答器的信息保持机制供电的蓄电装置。 在应答器丢失并重新建立电源后,在应答器重新启动之前,检查蓄电装置,以确定信息保留机制中是否存在足够的电力以保留信息而不会发生损坏。 如果存在足够的功率,则指示该事实的信号被传送到应答器,并恢复存储的信息。 然后重新启动应答器。

    Circuit antitheft and disabling mechanism
    7.
    发明授权
    Circuit antitheft and disabling mechanism 失效
    电路防盗和禁用机制

    公开(公告)号:US5739754A

    公开(公告)日:1998-04-14

    申请号:US681742

    申请日:1996-07-29

    IPC分类号: G08B13/14

    CPC分类号: G08B13/1409

    摘要: The present invention is a magnetic sensor used with one or more frequency band pass filters and a logic circuit that produces a ("critical") signal that is used for enabling and disabling an external electronic circuit, e.g. a computer circuit. The magnetic sensor produces a signal when excited by an externally applied alternating current (ac) magnetic field. The external ac magnetic field can comprise one or more frequencies, each of which induces an electrical signal at the respective frequency in the sensor. Depending on the linearity of the sensor, one or more harmonic frequencies of the signal frequencies can also be induced in the sensor. One or more bandpass filters is connected to the magnetic sensor and each of the bandpass filters is tuned to filter the signal to select filtered signals, from the output of the sensor. A logic circuit is activated by one or more of the filtered signals or a combination of one or more of the signal frequencies. When the logic circuit is activated, a critical signal is applied to an electronic circuit to enable or disable the external electronic circuit.

    摘要翻译: 本发明是与一个或多个频带通滤波器一起使用的磁传感器和产生用于启用和禁用外部电子电路的(“临界”)信号的逻辑电路,例如, 一个电脑电路。 当由外部施加的交流(ac)磁场激励时,磁传感器产生信号。 外部交流磁场可以包括一个或多个频率,每个频率在传感器中以相应的频率感应电信号。 根据传感器的线性度,也可以在传感器中感应出信号频率的一个或多个谐波频率。 一个或多个带通滤波器连接到磁传感器,并且每个带通滤波器被调谐以对信号进行滤波以从传感器的输出中选择滤波信号。 逻辑电路由一个或多个滤波信号或一个或多个信号频率的组合激活。 当逻辑电路被激活时,关键信号被施加到电子电路以启用或禁用外部电子电路。

    Automated RFID transponder manufacturing on flexible tape substrates
    10.
    发明授权
    Automated RFID transponder manufacturing on flexible tape substrates 有权
    自动化RFID应答器制造在柔性胶带基材上

    公开(公告)号:US6140146A

    公开(公告)日:2000-10-31

    申请号:US365792

    申请日:1999-08-03

    IPC分类号: G06K19/077 H01L21/00

    CPC分类号: G06K19/07718 G06K19/07749

    摘要: Processes and apparatus for manufacturing radio frequency transponders having substrates formed from a flexible tape or film are disclosed. The RF transponders are formed on the tape so that their longest dimension (e.g., their length ("L")) is oriented parallel to the length of the tape. This layout places few or no constraints in the transponder's length allowing the length of the transponder's antenna circuit to be adjusted to satisfy the requirements of various applications.

    摘要翻译: 公开了用于制造具有由柔性带或膜形成的基底的射频转发器的方法和装置。 RF转发器形成在带上,使得它们的最长尺寸(例如,其长度(“L”))平行于带的长度定向。 该布局在转发器的长度上放置很少或没有约束,允许应答器的天线电路的长度被调整以满足各种应用的要求。