×

Radio frequency identification devices, backscatter communication device wake-up methods, communication device wake-up methods and a radio frequency identification device wake-up method

  • US 7,019,617 B2
  • Filed: 10/02/2002
  • Issued: 03/28/2006
  • Est. Priority Date: 10/02/2002
  • Status: Expired due to Fees
First Claim
Patent Images

1. A radio frequency identification device comprising:

  • an antenna;

    radio frequency identification device communication circuitry coupled with the antenna and configured to receive a plurality of first wireless communication signals from a reader, to process the first wireless communication signals, and to control the communication of a plurality of second wireless communication signals to the reader responsive to the processing of the first wireless communication signals;

    wake-up circuitry coupled with the antenna and configured to receive electrical energy from the antenna corresponding to radio frequency energy received using the antenna, to analyze the received electrical energy with respect to a reference signal, and to output a wake-up signal to the communication circuitry responsive to the analysis; and

    wherein the reference signal is generated responsive to the reception of the radio frequency energy using the antenna.

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