Chip card

摘要

The chip card can be coupled to a read/write station via a contact field (1) or via an antenna coil (3), with the coupling used for transmission of data and for supplying the operating energy for the chip card. When the antenna coil is used as the coupling mode, a rectifier is used to provide the operating voltage, which is directly supplied to the chip card components, with an AC recognition circuit (12) used for switching between the alternate coupling modes.