Interface circuit for chip cards

Details Interface circuit for chip cards Interface circuit for chip cards

1992-10-30

1994-07-05

Wambach, Margaret Rose

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3073031, 3073032, H03K 1750

Patent

active

053270185

ABSTRACT:
The invention concerns interface circuits for chip card readers. It consists of providing link connections between this circuit and the reader, these connections being identical to those established between the circuit and the chip card. An internal switch (102) in the circuit is used to link these connections together, or to a control register (101), which is internal to the circuit, and actuated by an additional control connection. With the invention, it is possible to limit the number of connections between the circuit and the reader and to control the circuit with a software interface which is identical to the control interface of a chip card.

REFERENCES:
patent: 4827450 (1989-05-01), Kowalski
patent: 4868489 (1989-09-01), Kowalski
patent: 4881199 (1989-11-01), Kowalski
patent: 4890187 (1989-12-01), Tailliet et al.
patent: 4896298 (1990-01-01), Kowalski
patent: 4959197, Parekh et al.
patent: 5000371 (1991-03-01), Tailliot et al.
patent: 5060198 (1991-10-01), Kowalski
patent: 5060261 (1991-10-01), Auenier et al.
patent: 5097146 (1992-03-01), Kowalski

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