SUBSET SELECTION OF RFID TAGS USING LIGHT
    5.
    发明申请
    SUBSET SELECTION OF RFID TAGS USING LIGHT 有权
    选择使用光的RFID标签

    公开(公告)号:US20120249303A1

    公开(公告)日:2012-10-04

    申请号:US12420009

    申请日:2009-04-07

    IPC分类号: G06K7/01 H03K17/22 G06K19/073

    摘要: Methods and apparatuses for selecting a subset of RFID tags are provided in some embodiments. These methods and apparatuses utilize the susceptibility to light by persistent nodes found in passive tags. Light can be used to intentionally reduce persistence times in a particular subset tags or even an individual tag. Then, persistent nodes can be used as a selection criterion to distinguish previously illuminated tags from non-illuminated tags. In other embodiments, a power circuit receives a RF input source and generates a direct current (DC) output voltage. The circuit includes a bias circuit to supply a gate to source bias, which is independent of the DC output voltage. The circuit further includes a voltage multiplier circuit that is coupled to the bias circuit. The voltage multiplier circuit has MOS transistors with one transistor to receive the gate to source bias.

    摘要翻译: 在一些实施例中提供了用于选择RFID标签子集的方法和装置。 这些方法和装置利用被动标签中发现的持久节点对光的敏感性。 光可用于有意减少特定子集标签甚至单个标签中的持续时间。 然后,持久性节点可以用作选择标准,以区分先前照亮的标签和非照明标签。 在其他实施例中,电源电路接收RF输入源并产生直流(DC)输出电压。 该电路包括一个偏置电路,用于提供栅极与源极偏置,其独立于直流输出电压。 电路还包括耦合到偏置电路的电压倍增器电路。 电压倍增器电路具有MOS晶体管,其中一个晶体管接收栅极到源偏置。