Reader for RFID system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 9, 2001
Grant Date -
N/A
app pub date -
Feb 14, 2000
filing date -
May 14, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A reader (10) capable of efficiently reading tags (12) of differing protocols in a radio frequency identification system. The tag may be either a full-duplex tag or a half-duplex tag. The reader includes a display (16), a power switch (18) and a read switch (20) for enabling operation of the reader by a user. The reader further includes a coil (60); a driver circuit (32) coupled to the coil; and a signal analyzing circuit (82, 84, 90) coupled to the coil. The signal analyzing circuit analyzes tag identification signals sensed by the coil by detecting an initial data sequence of the tag identification signals and selecting from at least two different protocols the correct protocol of the tag identification signal.
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