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Memory tag and a reader

  • US 20040099738A1
  • Filed: 10/31/2003
  • Published: 05/27/2004
  • Est. Priority Date: 11/21/2002
  • Status: Active Grant
First Claim
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1. A memory tag comprising a resonant circuit part, a detector module and an output generator module, the resonant circuit part being operable to generate an output signal in response to a reader signal from a reader, the magnitude of the output signal being dependent on the magnitude of the reader signal, the detector module being responsive to the magnitude of the output signal such that, when the magnitude of the output signal is relatively low, the detector module causes the output generator module to transmit an identifier signal, and when the magnitude of the output signal is relatively high, the detector module is operable to cause the tag to move to an operating mode.

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