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RFID TRANSPONDER WITH IMPROVED WAKE PATTERN DETECTION AND METHOD

  • US 20100141389A1
  • Filed: 12/02/2009
  • Published: 06/10/2010
  • Est. Priority Date: 12/02/2008
  • Status: Active Grant
First Claim
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1. An RFID transponder comprising:

  • an automatic gain control (AGC) stage for amplifying a radio frequency (RF) signal and for providing an amplified RF signal, the AGC stage having a control signal indicating an increase of the amplitude of the RF signal;

    a demodulator coupled to receive the amplified RF signal for demodulating the amplified RF signal and for providing a data signal;

    a burst detector coupled to receive the control signal of the AGC stage and adapted to provide a start signal in response to a change of the control signal; and

    a wake pattern detector coupled to receive the data signal and the start signal, wherein the wake pattern detector is adapted to detect a predefined wake pattern in the data signal after having received the start signal and to issue a wake signal if the predefined wake pattern is detected for switching the RFID transponder from a first operating mode into a second operating mode having higher power consumption than the first operating mode.

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