IC card reader/writer

Details IC card reader/writer IC card reader/writer

1987-08-11

1988-09-20

Pitts, Harold I.

Registers

Records

Conductive

235380, G06K 1906

Patent

active

047727837

ABSTRACT:
Since the IC card does not have a power source in an ordinary case, the power is supplied thereto from the IC card reader/writer via the contact electrode. According to the present invention, a current detect unit is disposed between the power source of the IC card reader/writer and the contact electrode for the power supply to detect the presence/absence of the current supply. A data signal can be delivered from the IC card reader/writer to the IC card only when the current supply is detected by the current detect unit so as to prevent the latch-up phenomenon due to an insufficient contact between the electrodes of the IC card particularly including a complementary MOS and the electrodes of the IC card reader/writer, thereby preventing the destruction of the IC card.

REFERENCES:
patent: 4380699 (1983-04-01), Monnier et al.

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