Noncontacting card, noncontacting-card terminal and noncontactin

Details Noncontacting card, noncontacting-card terminal and noncontactin Noncontacting card, noncontacting-card terminal and noncontactin

1992-10-21

1995-07-25

Shepperd, John

Registers

Records

235492, 235493, G06K 1907

Patent

active

054364418

ABSTRACT:
A noncontacting card containing a coil circuit has at least two spiral windings connected in parallel for electromagnetically coupling the card to a terminal and a processing circuit connected to the coil circuit for signal processing. A terminal for a noncontacting card including a coil circuit has at least two spiral windings connected in parallel for electromagnetically coupling the terminal to a noncontacting card and a processing circuit connected to the coil circuit for signal processing. A noncontacting transmission system includes a noncontacting card having a coil circuit including at least two spiral windings connected in parallel and a terminal having a coil circuit including at least two spiral winding connected in parallel, the coil circuits of the noncontacting card and the terminal being electromagnetically coupled for transmitting electrical power to the noncontacting card and exchanging data between the terminal and the noncontacting card.

REFERENCES:
patent: 2843829 (1958-07-01), Slate
patent: 3845437 (1974-10-01), Goodman
patent: 4678986 (1987-07-01), Barthelemy
patent: 4761628 (1988-08-01), Nishi et al.
patent: 4791283 (1988-12-01), Burkhardt
patent: 4791285 (1988-12-01), Ohki
patent: 4818853 (1989-04-01), Ohta et al.
patent: 4818855 (1989-04-01), Mongeon et al.
patent: 4899036 (1990-02-01), McCrindle et al.
patent: 4960983 (1990-10-01), Inoue
patent: 5198647 (1993-03-01), Mizuta

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