초록 ▼

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

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.

대표청구항 ▼

[ What is claimed is:] [1.] A reader for an identification system capable of reading the tag identification signals of identification tags having different output protocols, the reader comprising:a coil;a driver circuit coupled to said coil;a signal analyzing circuit coupled to said coil to obtain a

[ What is claimed is:] [1.] A reader for an identification system capable of reading the tag identification signals of identification tags having different output protocols, the reader comprising:a coil;a driver circuit coupled to said coil;a signal analyzing circuit coupled to said coil to obtain and analyze tag identification signals sensed by said coil and output a corresponding pulse train;a means for converting said pulse train into a data sequence; andmeans for detecting an initial data sequence of the tag identification signals and for selecting from at least two different protocols the correct protocol of the tag identification signal being sensed by the reader based upon the initial data sequence of the tag identification signal.