Inductive coupling reader comprising means for extracting a power supply voltage
US7665664B2 · kind B2 · utility
7Cited by
4References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2005 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Jan 18, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method for supplying a power supply voltage (Vccr) to a contactless integrated circuit reader (RD1) that is in a passive operating mode, in the presence of an external alternating magnetic field (FLD2), the reader comprising an antenna circuit (ACT) substantially tuned to a working frequency (F0). According to the present invention, the method comprises the steps of taking off in the antenna circuit (ACT) an alternating voltage (Vcd) induced in the antenna circuit by the external magnetic field (FLD2), and rectifying the induced voltage to supply an auxiliary supply voltage (Vccr).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.