Data carrier for contactless reception of data and energy, and a method of operating such a data carrier
US6213402A · kind A · utility
12Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1999 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Feb 17, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data carrier, such as a smart card, has a coil for contactless reception of data and energy and for contactless transmission of data. A logic circuit processes the received, demodulated and decoded data. A first demodulator for demodulating received 100%-ASK-modulated signals and a second demodulator for demodulating received ASK-modulated signals with a modulation depth of less than 100% are provided. The second demodulator is triggered by the first demodulator in such a way that on reception of a 100%-ASK-modulated signal, it is deactivated by the first demodulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.