Duplex transmission in an electromagnetic transponder system
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United States of America Patent
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Aug 31, 2004
Grant Date -
N/A
app pub date -
Apr 5, 2000
filing date -
Apr 7, 1999
priority date (Note) -
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Abstract
A method of transmission between two elements chosen from a terminal and a transponder, each element including an oscillating circuit, a modulator and a demodulator, including simultaneously performing a transmission in amplitude modulation of a signal transmitted from a first to a second element and a transmission of a signal from the second to the first element adapted to being submitted to a phase demodulation in the latter, and wherein the amplitude modulation rate is smaller than 100%.
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