Reader and/or writer apparatus, power feeding system, and communication system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 19, 2003
Issued Date -
N/A
app pub date -
Dec 22, 2000
filing date -
Jun 20, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A reader and/or writer apparatus having an antenna lying substantially in a plane for generating an electromagnetic field to supply power to an IC card and a conductor member to be disposed in a plane substantially parallel to the plane of the antenna, wherein the distance between the antenna and the conductor member is no greater than 20 mm. A power supplying system supplies power using electromagnetic waves from the reader and/or writer apparatus to the IC card. The IC card includes a circuit for converting the supplied power to a D.C. voltage and for supplying the D.C. voltage to an internal circuit of the IC card.
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