| 摘要 |
Provided in a circuit ( 8 ) for a data carrier ( 7 ) are a circuit part ( 12 ), which requires a relatively large amount of energy, and at least part of a contact interface ( 11 ) via which the circuit part ( 12 ) can be supplied with electrical energy, which circuit part ( 12 ) is designed to process data signals (DS 1, DS 2 ) in a normal-consumption processing mode and in an energy-saving processing mode in which less energy is required than in the normalconsumption processing mode, and which circuit part ( 12 ) can be switched into the energysaving processing mode when energy is being supplied via the contact interface ( 11 ) and which circuit part ( 12 ) can be switched, with the aid of a first mode change signal (MC 1 ) that can be fed thereto, from the energy-saving processing mode into the normal-consumption processing mode, and further provided in this circuit ( 8 ) is at least part of a contactless interface ( 23 ) via which a carrier signal (TS) can be received by the circuit ( 8 ), and furthermore provided in this circuit ( 8 ) is a mode change signal generation stage ( 24 ) which is designed to detect receipt of the carrier signal (TS) via the contactless interface ( 23 ) and, upon detection of the receipt of the carrier signal (TS), to generate and output the first mode change signal (MC 1 ) to the circuit part ( 12 ).
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