Chip card with a contactless energy supply and data transmission

Details Chip card with a contactless energy supply and data transmission Chip card with a contactless energy supply and data transmission

1996-08-26

1999-12-07

Auve, Glenn A.

Registers

Coded record sensors

Particular sensor structure

235492, 39575001, G06F 1300

Patent

active

059997133

ABSTRACT:
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. A triggerable switch device which is provided on the chip connects the memory either to the contacts or to the device for contactless data transmission as a function of a state of an output signal of a logic circuit connected to at least a voltage supply contact. The switch device assumes a position of repose when it is not triggered and in that position it connects the memory to the device for contactless data transmission, while only upon application of a voltage to the supply voltage contact, triggered by the logic circuit, does it connect the contacts to the memory.

REFERENCES:
patent: 5206495 (1993-04-01), Kreft
patent: 5594233 (1997-01-01), Kenneth et al.

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