Title: Chip card
Application Number: 99104112 Application Date: 1999.03.17
Publication Number: 1233028 Publication Date: 1999.10.27
Approval Pub. Date: 2003.07.02 Granted Pub. Date: 2003.07.02
International Classifi-cation: G06K19/073
Applicant(s) Name: Siemens AG Address:
Inventor(s) Name: Dominik Berger;Heiko Fibranz;Wolfgang Eber
Attorney & Agent: cheng tianzheng
Abstract:
    The invention relates to a chip card includes a semiconductor chip that contains at least one memory. In order to supply energy to the chip and to provide for bi-directional data transmission from and to the chip, both contacts and a device for contactless data transmission are provided. The memory (1) is directly connected with means being provided for contactless data transmission (2) via a line (5) and a demodulation circuit (3), at this time, the memory connects with a voltage-supply contact (21) only via a switch (10) which is drives by a logic circuit (8).
Time: 6
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