Portable data carrier with active contactless interface
The method involves generating an own field by a portable data carrier e.g. mass storage card (120), for transmission of data to a reading device in an active operating mode, and transmitting the field as a signal by the carrier, where the signal is evaluated as a modulation of the reading device fi...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | The method involves generating an own field by a portable data carrier e.g. mass storage card (120), for transmission of data to a reading device in an active operating mode, and transmitting the field as a signal by the carrier, where the signal is evaluated as a modulation of the reading device field by a transponder. The modulation of the reading device field is executed by the carrier in a passive operating mode. The selection of the active or passive mode is carried based on an internal selection signal of the carrier. Independent claims are also included for the following: (1) an interface unit for signal modulation (2) a portable data carrier (3) a valuable document e.g. bank note and cheque (4) a data transmission system having a portable data carrier. |
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