Near field communication device, electronic system having the same and method of controlling power in near field communication device
US9538314B2 · kind B2 · utility
0Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2014 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | Feb 16, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A near field communication (NFC) device includes a resonance unit and an NFC chip. The resonance unit emits an electromagnetic wave to communicate data with an external NFC card in a reader mode. The NFC chip estimates a distance between the resonance unit and the external NFC card based on an antenna voltage generated by the resonance unit while the resonance unit emits the electromagnetic wave, and adjusts a magnitude of the electromagnetic wave based on the estimated distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.