Registers – Records – Conductive
Patent
1997-08-01
1999-02-23
Gross, Anita Pellman
Registers
Records
Conductive
235439, 34082534, 34082554, G06K 906
Patent
active
058747257
ABSTRACT:
A batteryless non-contact IC card, using electromagnetic waves as a communication medium, includes an antenna resonance circuit for data transmission and reception; a phase variation detector for detecting a phase variation of a voltage of the antenna resonance circuit due to a received signal, on the basis of an amplitude variation of the received signal; and a demodulator for demodulating data in accordance with the phase variation detected by the phase variation detector.
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Gross Anita Pellman
Lee Michael G.
Mitsubishi Denki & Kabushiki Kaisha
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