EP 0033441 B1 19840912 - PULSE TRANSFORMER AND ITS USE AS ISOLATION TRANSFORMER
Title (en)
PULSE TRANSFORMER AND ITS USE AS ISOLATION TRANSFORMER
Publication
Application
Priority
CH 81480 A 19800201
Abstract (en)
[origin: US4342976A] The pulse transformer consists of a closed toroidal core (30), the primary winding (31) and secondary winding (32) of which are fashioned as multilayer, flexible printed circuit boards. These circuit boards have the shape of flat strips and are bent into loops. By means of pins (36-39 and 46-49, respectively), they are connected mechanically and partially electrically to a supporting printed circuit board (11). The pins connect the conductor tracks of the central layer of the flexible printed circuit boards with respectively one winding, whereas the upper and lower conductive layers shield the windings against electromagnetic interferences coming from the outside. The pulse transformer is suitable as an isolation transformer for the transmission of rapid digital signals arriving, for example, via a coaxial line (20).
IPC 1-7
IPC 8 full level
H01F 17/00 (2006.01); H01F 17/06 (2006.01); H01F 19/04 (2006.01); H01F 19/08 (2006.01)
CPC (source: EP US)
H01F 17/0006 (2013.01 - EP US); H01F 17/062 (2013.01 - EP US); H01F 19/08 (2013.01 - EP US); H01F 2005/046 (2013.01 - EP US); H01F 2017/065 (2013.01 - EP US); H01F 2019/085 (2013.01 - EP US); H01F 2027/2861 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0033441 A1 19810812; EP 0033441 B1 19840912; AT E9419 T1 19840915; CA 1144247 A 19830405; DE 3165884 D1 19841018; JP S56129305 A 19811009; JP S6335089 B2 19880713; US 4342976 A 19820803
DOCDB simple family (application)
EP 81100159 A 19810112; AT 81100159 T 19810112; CA 368898 A 19810120; DE 3165884 T 19810112; JP 1178281 A 19810130; US 22815581 A 19810123