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Title:
DATA CARRIER
Document Type and Number:
WIPO Patent Application WO/1991/011784
Kind Code:
A1
Abstract:
A data carrier wherein a shift register is used as a memory. When writing a datum, the signal having the duty factor corresponding to the written data is written into a shift register through a resonance circuit to store the data in the register, which hereafter retains the data in a circulation mode. The data stored in the shift register is read out in accordance with an identification code from outside. Thus, the data carrier of a small capacity is simply constituted.

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Inventors:
FUKUOKA SHINICHIRO (JP)
KANDA YOSHIMI (JP)
MIYAKE RYOICHI (JP)
Application Number:
PCT/JP1991/000110
Publication Date:
August 08, 1991
Filing Date:
January 30, 1991
Export Citation:
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Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
International Classes:
G06K7/00; G06K19/07; (IPC1-7): G06K19/00; H04B5/00
Foreign References:
JPS51150917A1976-12-24
JPS52150937A1977-12-15
JPS61210487A1986-09-18
JPS61241887A1986-10-28
JPS61283981A1986-12-13
JPS63112198A1988-05-17
JPH01151832A1989-06-14
JPH01222392A1989-09-05
Other References:
See also references of EP 0466934A4
Attorney, Agent or Firm:
Fukami, Hisao (1-29 Minamimori-machi 2-chome, Kita-k, Osaka-shi Osaka 530, JP)
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