Title:
【発明の名称】電磁結合を用いた近接型データキャリア
Document Type and Number:
Japanese Patent JP2839956
Kind Code:
B2
Abstract:
PURPOSE:To uniformize received signals of a data carrier when the electric power of carriers containing the signals is excessively large by providing a means for consuming the excessive component. CONSTITUTION:A data carrier is provided with a reception level detecting section 40 which detects the level of received signals fetched by means of the electromagnetic coupling of a reception coil 11 and an electric power consuming section 50 which consumes the electric power of carriers containing the signals in accordance with the detected reception level are provided. Then the reception level of the signals is monitored by means of the detecting section 40 which detects the envelope of the AC component of the carrier containing the received signals fetched by means of the electromagnetic coupling of the coil 11 as the reception level before the carriers are rectified. The electric power of the reception level thus detected is supplied to the consuming section 50 and part of the output of a rectifier circuit 31 is consumed in accordance with the reception level.
Inventors:
OOKI TOSHIHIRO
Application Number:
JP40249190A
Publication Date:
December 24, 1998
Filing Date:
December 14, 1990
Export Citation:
Assignee:
SUTAA SEIMITSU KK
International Classes:
B42D25/305; G06K19/07; H02J50/00; B42D15/10; H02J50/10; H04B5/00; (IPC1-7): G06K19/07; H04B5/00
Domestic Patent References:
| JP63153691A | ||||
| JP63247889A | ||||
| JP1102693A | ||||
| JP2310687A |
Attorney, Agent or Firm:
Toshihiko Kanayama (2 outside)