Wireless flywheel synchronization method
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United States of America Patent
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May 5, 1998
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N/A
app pub date -
May 8, 1996
filing date -
May 8, 1996
priority date (Note) -
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Abstract
The invention is an improved method and apparatus for synchronizing wireless communications utilizing a master source (10) for a transmitting a synchronizing pulse to multiple reader modules (20 and 28) each of which has an internal crystal oscillator (22 and 30). The synchronizing pulse periodically resets the interrogation cycle, the power burst and receive cycle, for all of the reader modules (20 and 28). Between pulses, the internal crystal oscillator (22 and 30) is used to run interrogation cycles, and thus functions as a 'flywheel' to absorb fluctuations in the synchronizing pulse such as when a particular synchronizing pulse is missed.
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