Method for reducing RF interference inside dual-interface...

Details Method for reducing RF interference inside dual-interface... Method for reducing RF interference inside dual-interface...

2009-05-13

2011-12-20

Lee, Michael G (Department: 2876)

Registers

Coded record sensors

Particular sensor structure

Reexamination Certificate

active

08079520

ABSTRACT:
The present invention provides a method for reducing RF interference inside a dual-interface card reader and a dual-interface card reader, which relate to dual-interface card reader field. The method includes: adjusting RF power by the dual-interface card reader to reach a specified maximum value; determining the type of an IC card which is operating currently by the dual-interface card reader; if the IC card is a contactless IC card, responding to the contactless card and not responding to any contact IC card before the operation of the contactless IC card is completed by the dual-interface card reader; if the IC card is a contact IC card, adjusting the RF power so as to make the RF power to be lower and responding to the contact IC card by the dual-interface card reader, and if a contactless IC is operating before the operation of the contact IC card is completed, responding to the contactless IC card simultaneously by the dual-interface card reader. The dual-interface card reader includes: a determining module, a control module, a contact card communication module, a contactless card communication module and a data transferring module. The invention provides a solution for reducing RF interference inside a dual-interface card reader, which is implemented easily and conveniently. The identification effect of the dual-interface card reader is improved.

REFERENCES:
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patent: 5594233 (1997-01-01), Kenneth et al.
patent: 6411200 (2002-06-01), Kawagishi
patent: 6839772 (2005-01-01), Kowalski et al.
patent: 7441702 (2008-10-01), Tadamasa
patent: 7506814 (2009-03-01), Nakabo et al.
patent: 199923699 (2000-10-01), None
patent: WO-9746964 (1997-12-01), None
European Search Report dated Sep. 11, 2009 regarding Application No. EP 09305470.

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