×

Method of reading information from RF tag and method of writing information therein

  • US 20060132288A1
  • Filed: 11/23/2005
  • Published: 06/22/2006
  • Est. Priority Date: 11/30/2004
  • Status: Abandoned Application
First Claim
Patent Images

1. A method of reading information from an RF tag that resonates by electromagnetic inductance, the RF tag including at least two sets of electromagnetic resonance circuits having mutually different resonance frequencies, the at least two sets of electromagnetic resonance circuits having at least one of a resistor and a capacitor, a fuse or antifuse element capable of selecting a low impedance state and a high impedance state on the basis of an electrical signal, and a coil antenna, the method comprising:

  • transmitting a plurality of frequencies to the RF tag;

    receiving a plurality of reflected waves corresponding to the mutually different resonance frequencies of the at least two sets of electromagnetic resonance circuits in response to the transmitted plurality of frequencies; and

    detecting a relative relationship of the mutually different resonance frequencies of the plurality of reflected waves, wherein detecting the relative relationship of the mutually different resonance frequencies of the plurality of reflected waves is performed either with or without using the values of the mutually different resonance frequencies.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×