Intelligent-type IC card containing IC circuit and battery

Details Intelligent-type IC card containing IC circuit and battery Intelligent-type IC card containing IC circuit and battery

1987-03-30

1989-05-02

Wong, Peter S.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235492, G06K 500

Patent

active

048271110

ABSTRACT:
An IC card and an IC card system using this card can be independently operated by a battery built in the IC card. The IC card and its system can detect power supplied from the card terminal and use a clock signal as an operating signal from the card terminal upon detection. Otherwise, a clock signal having a low frequency generated in a clock signal generating section in the card is used as an operating signal, thereby extremely reducing power consumption of the battery built into the card.

REFERENCES:
patent: 33906460 (1975-09-01), Halpern
patent: 4004133 (1977-01-01), Hannan et al.
patent: 4105156 (1978-08-01), Dethloff
patent: 4480178 (1984-10-01), Miller et al.
patent: 4614861 (1986-09-01), Pavlov et al.
patent: 4634845 (1987-01-01), Hale et al.
patent: 4692601 (1987-09-01), Nakano

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