Reader for RFID system
US6172609A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2000 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Feb 14, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/0008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.