| 摘要 |
The invention relates to an arrangement for implementing a planar magnetic circuit on a circuit board. The arrangement includes (a) a printed circuit board (PCB), wherein a conductive wire pattern of an inductive circuit is formed as well as openings (H1-H3) through the circuit board close to the conductive pattern, (b) two ferrite pieces (F1, F2), at least one of which can be fitted into the openings so that the pieces may be pressed against one another from opposite sides of the circuit board, and (c) a mechanical clamp (CL2, CL3, CL4) which can be fitted around the ferrite pices to lock them to each other, whereby the clamp extends around the ferrite pieces located on both sides of the circuit board. To eliminate gluing of ferrite pieces and to eliminate any relative movement between the ferrite pieces and the circuit board, the clamp is formed with spring-like protrusions (14-16) which are fitted in relation to the openings (H1-H3) in the circuit board so that they are pressed against the inner edges of the openings when the clamp is in its position around the ferrite pieces. |
