Dual-mode data carrier and circuit for such a data carrier with potential cut-off for at least one contact terminal
US6364207B1 · kind B1 · utility
4Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1998 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | Sep 22, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data carrier (1) which can be operated in a contact-bound mode and in a contactless mode and a circuit (1A) for such a data carrier (1) has supply voltage generating means (35), for deriving a supply voltage (VDD) for various circuit sections of the data carrier (1) and of the circuit (1A) from a received useful HF signal (HF), and additional switching means (91) by means of which the application of a potential (VDD), which appears as a result of the supply voltage generated by the supply voltage generating means (35), to at least one contact terminal (17A) can be inhibited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.