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Self powered electronic memory identification tag with dual communication ports

  • US 6,046,676 A
  • Filed: 11/14/1997
  • Issued: 04/04/2000
  • Est. Priority Date: 11/14/1997
  • Status: Expired due to Term
First Claim
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1. An integrated electronic memory tag comprising:

  • a first port for connection to a source of radio frequency signals;

    a memory for digital signals;

    a radio frequency power converter for converting a portion of the radio frequency energy received in the form of radio frequency signals into DC power for driving the memory;

    a radio frequency signal converter for converting the radio frequency signal into a digital signal;

    control logic in a radio frequency interface for responding to the digital signals passing between the memory and the first port;

    a digital signal converter for converting a digital signal from the control logic into a radio frequency signal;

    a second port for connection to an electronic device;

    a contention arbiter for controlling which of the ports has access to the memory;

    a logic gate, cooperating with the contention arbiter, for alternatively connecting the first port and the second port to the memory.

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