Station, a passive portable object and apparatus for the remote exchange of information between the passive portable object and the station
US5838235A · kind A · utility
33Cited by
7References
17Claims
0Family size
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Inventor
Key dates
| Filing date | Sep 5, 1996 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Sep 5, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/086
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Apparatus for the exchange of information by electromagnetic coupling between a passive portable object and a station comprising: first electromagnetic coupling means for the transmission of data between the portable object and the station, and second electromagnetic coupling means independent of the first means for the transfer of energy and a clock signal to the portable object. A filtering circuit is provided on the station side, which behaves as an inductance at the frequency associated with the data transmission and as a high value impedance at the frequency associated with the energy transfer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.