Title:
【発明の名称】非接触ICカード
Document Type and Number:
Japanese Patent JP2822624
Kind Code:
B2
Abstract:
In a non-contact IC card, when the card is in a standby mode of operation a CPU provides a command to inhibit the application of a clock signal to digital circuitry including the CPU and/or to inhibit the application of an operating voltage to analog circuitry, except for an antenna circuit and a trigger signal demodulating circuit, so that power consumption in the standby mode is reduced. For transfer of data between the IC card and an external device, a trigger signal derived by demodulating received data in the trigger signal demodulating circuit is used to apply the clock signal to said digital circuitry and the operating voltage to all of the analog circuitry.
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Inventors:
Fujioka Sozo
Toshiyuki Matsubara
Furuta Shigeru
Toshiyuki Matsubara
Furuta Shigeru
Application Number:
JP17800390A
Publication Date:
November 11, 1998
Filing Date:
July 03, 1990
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
G06F1/04; G06F1/32; B42D15/10; G06K19/07; H02J9/00; (IPC1-7): G06K19/07; G06F1/04
Domestic Patent References:
| JP293886A | ||||
| JP2144603A |
Attorney, Agent or Firm:
Kaneo Miyata (2 outside)