Telecommunications – Transmitter and receiver at separate stations – Near field
Reexamination Certificate
2007-08-28
2007-08-28
Anderson, Matthew D. (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Near field
C455S226100, C455S227000, C340S010100, C340S010400
Reexamination Certificate
active
11260870
ABSTRACT:
A terminal for generating an electromagnetic field adapted to communicating with at least one transponder, and a method for controlling such a terminal including: an oscillating circuit adapted to being excited by a remote supply signal of the transponder; a phase demodulator for detecting possible data transmitted by the transponder; circuitry for regulating the signal phase in the terminal's oscillating circuit on a reference value; circuitry for measuring variables linked to the current in the oscillating circuit and to the voltage thereacross; and circuitry for comparing current values of these variables with predetermined values, to determine the presence of a transponder.
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Anderson Matthew D.
Jorgenson Lisa K.
Morris James H.
STMicroelectronics S.A.
Tran Tuan
LandOfFree
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