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55 条记录 (耗时 0.035 秒)

    Circuit antitheft and disabling mechanism
    4.
    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

    申请人： Alejandro Gabriel Schrott ,  Michael John Brady ,  Thomas A. Cofino ,  Richard Joseph Gambino ,  Robert Jacob Von Gutfeld ,  Harley Kent Heinrich ,  Paul Andrew Moskowitz

    发明人： Alejandro Gabriel Schrott ,  Michael John Brady ,  Thomas A. Cofino ,  Richard Joseph Gambino ,  Robert Jacob Von Gutfeld ,  Harley Kent Heinrich ,  Paul Andrew Moskowitz

    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。

    Antenna for RF tag with a magnetoelastic resonant core
    10.
    发明授权
    Antenna for RF tag with a magnetoelastic resonant core 有权
    具有磁弹性共振芯的RF标签天线

    公开(公告)号：US6130612A

    公开(公告)日：2000-10-10

    申请号：US309330

    申请日：1999-05-11

    申请人： Anthony Castellano ,  Harley Kent Heinrich ,  Alejandro Gabriel Schrott ,  Robert Jacob Von Gutfeld

    发明人： Anthony Castellano ,  Harley Kent Heinrich ,  Alejandro Gabriel Schrott ,  Robert Jacob Von Gutfeld

    IPC分类号： G06K19/07 ,  G08B13/14

    CPC分类号： G06K19/0723

    摘要： A radio frequency identification transponder (RFID tag) includes an RFID antenna and one or more elements of nonlinear magnetic material tuned to resonate at substantially the same frequency as the resonant frequency of the tag antenna. This co-resonance amplifies signals that impinge upon the antenna, yielding both a higher level signal from the antenna to the tag electronics and wider operational bandwidth for the tag. With the addition of the nonlinear magnetic material, the tag may also be employed as a magnetic surveillance tag, with the attendant non-screening capabilities. With a plurality of nonlinear magnetic elements tuned to different resonant frequencies, the tag may provide more "non-screenable" information, that is, two bits, or four binary states, for example, when two such elements are employed.

    摘要翻译： 射频识别应答器（RFID标签）包括RFID天线和被调谐以与标签天线的谐振频率基本相同的频率谐振的非线性磁性材料的一个或多个元件。 这种共同共振放大了撞击在天线上的信号，产生了从天线到标签电子装置的较高电平信号和标签的更宽的操作带宽。 随着非线性磁性材料的添加，标签也可以用作磁性监视标签，伴随着非屏蔽能力。 利用调谐到不同谐振频率的多个非线性磁性元件，例如当使用两个这样的元件时，标签可以提供更多的“不可屏蔽的”信息，即两个位或四个二进制状态。