Non-contact IC card

Details Non-contact IC card Non-contact IC card

1991-04-17

1993-04-13

Cosimano, Edward R.

Boots, shoes, and leggings

364550, 34087031, G06F 1520

Patent

active

052028380

ABSTRACT:
A non-contact IC card for receiving electrical power from and exchanging signals with a terminal device without contact has a power consuming circuit which consumes electrical power when the electrical power consumption in the IC card is small. The rate of power consumption by the power consuming circuit is controllable in accordance with the state of the IC card, such as a stand-by state, receiving state, transmitting state, and signal processing state. The power consuming circuit includes a series connection of a switching element and a resistor connected between high-voltage and grounding terminals. The state of the switching element is sequentially controlled by a microcomputer. The control of the power consumption is attained by selecting one of a plurality of the power consuming circuits having different resistance values.

REFERENCES:
patent: 4608550 (1986-08-01), Umebayashi et al.
patent: 4797541 (1989-01-01), Billings et al.

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