Registers – Coded record sensors – Particular sensor structure
Patent
1986-05-05
1988-11-15
Faber, Alan
Registers
Coded record sensors
Particular sensor structure
235492, 235438, 235380, G06K 701, G06K 706
Patent
active
047851660
ABSTRACT:
A reader/writer for IC card according to the present invention is for carrying out transfer of information between the IC card by supplying an operating power to the IC card through its connection with the IC card, and it comprises a power supply circuit for supplying an operating power to the IC card, a current limiting circuit connected in series to the power supply circuit, for limiting the current that is supplied from the power supply circuit to the IC card to values below a predetermined value, an abnormality detection circuit for detecting abnormality in the supply of the operating power to the IC card, and a control circuit which supplies a first operating power from the power supply circuit to the portable recording medium via the current limiting circuit, when the IC card is first connected, and controls to supply a second operating power which is larger than the first operating power to the IC card from the power supply circuit, only when the supply of the first operating power is found normal without detection of abnormality by the abnormality detection circuit.
REFERENCES:
patent: 3935527 (1976-01-01), Michelet et al.
patent: 4307440 (1981-12-01), Inoue et al.
patent: 4538058 (1985-08-01), Ugon et al.
patent: 4602351 (1986-07-01), Shimamura et al.
patent: 4628431 (1986-12-01), Kayser
patent: 4675516 (1987-06-01), Guion
Faber Alan
Kabushiki Kaisha Toshiba
Weinhardt Robert A.
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