Pulse transformer

Details Pulse transformer Pulse transformer

1981-01-23

1982-08-03

Kozma, Thomas J.

Inductor devices

With electric and/or magnetic shielding means

336200, 336205, 336223, H01F 1504, H01F 2728

Patent

active

043429769

ABSTRACT:
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).

REFERENCES:
patent: 3102245 (1963-08-01), Lawson, Jr.
patent: 4249229 (1981-02-01), Hester

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