Automatic tuning for RFID systems by changing capacitor values in case of an error
US8536982B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 2005 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Aug 30, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A reader for reading a memory tag comprises a resonant circuit part, a frequency source, a tuning detector and a tuning controller. The resonant circuit part has a resonant frequency. The frequency source is operable to generate a driving signal and is connected to the resonant circuit part to provide inductive coupling to a tag. The tuning detector is responsive to the relative resonant frequencies of the resonant circuit part and a memory tag resonant circuit part of the memory tag to generate a tuning signal. The tuning controller is responsive to the tuning signal to control the resonant frequency of the resonant circuit part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.