Title:
MAGNETIC IMPEDANCE ELEMENT AND CURRENT/MAGNETIC FIELD SENSOR
Document Type and Number:
WIPO Patent Application WO/2004/086073
Kind Code:
A1
Abstract:
A magnetic impedance (MI) element suitably used as a current/magnetic field sensor is reduced in power consumption and cost. Although power saving has conventionally been difficult because a bias magnetic field must be applied in order for an MI element to be used as a current/magnetic field sensor, a permanent magnet (or thin-film permanent magnet) (18) is used for the application of a bias magnetic field, and a thin-film negative feedback coil is formed on a magnetic film (4) using a metal pattern (11) and wire-bonding (10). Accordingly, power saving is achieved without requiring a bias current, and costs are reduced while eliminating a mechanical winding step or the like for a negative feedback coil.
Inventors:
MATSUZOE YUJI (JP)
KITAIDE YUJIRO (JP)
HAYASHI TAKASHI (JP)
SHIMIZU HIDEO (JP)
KITAIDE YUJIRO (JP)
HAYASHI TAKASHI (JP)
SHIMIZU HIDEO (JP)
Application Number:
PCT/JP2004/003266
Publication Date:
October 07, 2004
Filing Date:
March 12, 2004
Export Citation:
Assignee:
FUJI ELECTRIC HOLDINGS (JP)
MATSUZOE YUJI (JP)
KITAIDE YUJIRO (JP)
HAYASHI TAKASHI (JP)
SHIMIZU HIDEO (JP)
MATSUZOE YUJI (JP)
KITAIDE YUJIRO (JP)
HAYASHI TAKASHI (JP)
SHIMIZU HIDEO (JP)
International Classes:
G01R33/02; (IPC1-7): G01R33/02
Foreign References:
| JP2001358378A | 2001-12-26 | |||
| JP2001324555A | 2001-11-22 | |||
| JPH10319103A | 1998-12-04 | |||
| JP2002071740A | 2002-03-12 |
Attorney, Agent or Firm:
Yamaguchi, Iwao c/o YAMAGUCHI International Patent Office (3-2 Higashigotanda 2-chom, Shinagawa-ku Tokyo 22, JP)
Download PDF: