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Transponder interrogators, radio frequency identification device communication systems, transponder interrogator communication methods, and radio frequency identification device communication methods

  • US 20040049718A1
  • Filed: 09/05/2003
  • Published: 03/11/2004
  • Est. Priority Date: 02/28/1998
  • Status: Active Grant
First Claim
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1. A bit synchronizer configured to generate a timing signal for sampling a data signal comprising:

  • an error generator configured to detect error of the timing signal with respect to the data signal and output error update signals responsive to the detection of error;

    a bit clock generator configured to output the timing signal responsive to the error update signals and a plurality of history signals; and

    history circuitry configured to receive the error update signals and generate a history during a first portion of the data signal and generate the history signals during a second portion of the data signal responsive to the history.

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