| 摘要 |
<p>PROBLEM TO BE SOLVED: To increase packaging density by placing a coil assembly for a transformer and a coil assembly for choke coil which are formed of multilayered printed wiring boards, which is substantially flush with each other, and clamping the coil assemblies between housings of a ferromagnetic material with the coil assemblies isolated from each other using a diaphragm of the ferromagnetic material. SOLUTION: When a coil assembly 1 for transformer and a coil assembly 2 for choke coil are clamped between housings 4a, 4b, the walls 6a, 6b, 7a of the housing 4a and housing 4b and a diaphragm 3 are brought into tight contact with one another, and a slight space is formed between the walls 7b, 7b on the inside circumference of the coil assembly 2 for choke coil to generate a gap 8. The walls 6b, 6b on the inside circumference of a transformer section a form a magnetic core for transformer, and a high-frequency transformer is constituted of the coil assembly 1 for transformer and the housings 4a, 4b of a ferromagnetic material. The walls 7b, 7b on the inside circumference of a choke coil section b form a magnetic core for choke coil, and a choke coil is constituted of the coil assembly 2 for choke coil and the housings 4a, 4b of ferromagnetic material.</p> |
