| 摘要 |
<p>The invention concerns a planar transformer winding comprising primary (20a, 20b) and secondary (22a-22f) coils with wire turns produced in the form of strip conductors formed on the surfaces of an insulating base and electrically connected with one another by means of conducting holes bored in the insulating base. The primary and secondary winding portions (respectively 20a, 22a, 22c, 22e; respectively 20 b, 22b, 22d, 22f) borne by one common surface of the insulating base are joined together by winding, along two distinct overlapping zones, spiral in shape, one of the zones joining side by side turns or portions of turns (20a or 20b) of the primary coil and the other zone joining together the turns or portions or turns (22a, 22c, 22e or 22b, 22d, 22f) of the secondary coil. Such an arrangement enables to obtain primary and secondary coils with a different number of turns on one single insulating base with two surfaces.</p> |
