Telecommunications – Transmitter and receiver at separate stations – Near field
Reexamination Certificate
2005-09-02
2008-12-23
Nguyen, Lee (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Near field
C235S439000, C340S010100
Reexamination Certificate
active
07469127
ABSTRACT:
In a noncontact information carrier reader, a receiving unit receives a response wave transmitted from a noncontact information carrier. The response wave is generated by modulating the carrier wave based on a response signal. An amplifying unit amplifies carrier wave components contained in the received response wave based on a first gain, and amplifies response signal components contained in the received response wave based on a second gain. The second gain is higher than the first gain. A synchronized-detection demodulator demodulates the response signal components contained in the response wave by mixing the transmitted carrier wave and the response wave amplified by the amplifying unit.
REFERENCES:
patent: 2007/0001008 (2007-01-01), Steffen
patent: A-S58-050804 (1983-03-01), None
patent: A-H08-139549 (1996-05-01), None
patent: 11-298366 (1999-10-01), None
patent: A-2003-188741 (2003-07-01), None
patent: A-2003-298400 (2003-10-01), None
patent: A-2003-304174 (2003-10-01), None
patent: A-2004-070804 (2004-03-01), None
Office Action dated Oct. 7, 2008 in corresponding Japanese patent application No. 2004-257136 (and English translation).
Denso Wave Incorporated
Nguyen Lee
Posz Law Group , PLC
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