Title:
TRANSMISSION SIGNAL CANCELLER
Document Type and Number:
Japanese Patent JPH08223094
Kind Code:
A
Abstract:
PURPOSE: To prevent bad influence upon the outside by forming a proper access permission area in a near part and cancelling the signal in a distant place.
CONSTITUTION: A transmission coil 16 driven by supply of a transmission signal and a cancel coil 18 which is arranged so as to face the transmission coil 16 with a shielding member 20 between them are provided. The signal whose phase is shifted from the phase of the transmission signal supplied to the transmission coil 16 is supplied to the cancel coil by a phase inverting circuit 24 to drive this coil 16.
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Inventors:
ISHIBASHI YOSHITO
KOBAYASHI NARIYASU
KOBAYASHI NARIYASU
Application Number:
JP3032895A
Publication Date:
August 30, 1996
Filing Date:
February 20, 1995
Export Citation:
Assignee:
TOKIMEC INC
International Classes:
H04B5/02; H04B5/00; (IPC1-7): H04B5/02; H04B5/00
Attorney, Agent or Firm:
Susumu Takeuchi (1 person outside)