(19)
(11) EP 0 352 924 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.11.1990 Bulletin 1990/45

(43) Date of publication A2:
31.01.1990 Bulletin 1990/05

(21) Application number: 89306889.0

(22) Date of filing: 06.07.1989
(51) International Patent Classification (IPC)5: H01F 31/00, H01F 27/24
(84) Designated Contracting States:
DE FR GB

(30) Priority: 29.07.1988 US 226340

(71) Applicant: International Business Machines Corporation
Armonk, N.Y. 10504 (US)

(72) Inventors:
  • Duspiva, Walter Steven
    Port Ewen New York 12466 (US)
  • Gillett, John Brian
    Woodstock New York 12484 (US)
  • Spreen, James Harold
    Stone Ridge New York 12484 (US)

(74) Representative: Burt, Roger James, Dr. et al
IBM United Kingdom Limited Intellectual Property Department Hursley Park
Winchester Hampshire SO21 2JN
Winchester Hampshire SO21 2JN (GB)


(56) References cited: : 
   
       


    (54) Inductive device


    (57) An inductive device such as a transformer has a multi-turn magnetic core (16) disposed about a conductor loop (20). A bridge transformer (Fig. 2) has one turn of the core about one half of the conductor loop and a second turn of the core about the other half of the conductor loop, and an electrical centre tap connection (132) to the loop between the two halves thereof. Embedded diodes (110, 112) connect the ends of the loop to an external circuit.







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