RFID tag dynamically adjusting clock frequency
US8193912B1 · kind B1 · utility
23Cited by
8References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2009 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Feb 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13095
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
RFID tags are configured to adjust their clock frequency in order to meet predefined limits for reply frequencies to conserve tag power. A deviation of computed tag reply frequency from a reader commanded reply frequency is used to determine an adjustment to the tag clock frequency. The tag clock frequency may be adjusted during backscatter and restored once backscattering is completed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.