Dual-mode data carrier and circuit for such a data carrier with

Details Dual-mode data carrier and circuit for such a data carrier with Dual-mode data carrier and circuit for such a data carrier with

1998-09-22

2000-11-14

Hajec, Donald

Registers

Records

Conductive

235380, G06K 1906

Patent

active

061457493

ABSTRACT:
A data carrier (1) which can be operated in a contact-bound mode and in a contactless mode and a circuit (1A) for such a data carrier (1) has supply voltage generating means (35) for deriving a supply voltage (VDD), for various circuit sections of the data carrier (1) and of the circuit (1A), from a received useful HF signal (HF), and, in addition, potential equalizing circuit (94) by which at least two contact terminals (17A, 19A) each connected to a respective transmission contact (17, 19) can be brought at the same potential (ground).

REFERENCES:
patent: 5206495 (1993-04-01), Kreft
patent: 5929414 (1999-07-01), Saitoh
patent: 6003777 (1999-12-01), Kowalski

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