(19)
(11) EP 0 384 491 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
09.01.1991 Bulletin 1991/02

(43) Date of publication A2:
29.08.1990 Bulletin 1990/35

(21) Application number: 90105789.3

(22) Date of filing: 02.11.1984
(51) International Patent Classification (IPC)5: H01F 1/14, H01F 3/04
(84) Designated Contracting States:
DE FR GB

(30) Priority: 05.11.1983 JP 206898/83
01.10.1984 JP 204141/84

(62) Application number of the earlier application in accordance with Art. 76 EPC:
84307588.8 / 0145245

(71) Applicant: TDK Corporation
Chuo-ku, Tokyo-to 103 (JP)

(72) Inventors:
  • Takayama, Suguru
    Nagano (JP)
  • Shigeta, Masao
    Chiba (JP)

(74) Representative: Adams, William Gordon et al
RAWORTH, MOSS & COOK 36 Sydenham Road
Croydon Surrey CR0 2EF
Croydon Surrey CR0 2EF (GB)


(56) References cited: : 
   
       


    (54) Core of a noise filter comprised of an amorphous alloy


    (57) The present invention relates to the core of a noise filter comprising a coiled thin strip of an amorphous magnetic alloy.
    The alloy essentially consists of a first component which is Fe and Mo, a second component which is at least one selected from the group consisting of Si and Al, and a third component which is at least one selected from the group consisting of B,C and P.







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