Printed circuit board containing two coils, magnetic field sensor and alternative tension generator

摘要

The board has a set of coils (38, 39) that is connected in series, where the coils are rolled up around a set of axes (34, 36) of the coil. Each of the coils is formed by conducting tracks arranged in a metallization layer. The coils are electrically connected to one another by a set of studs. One of the axes of one coil forms a half-turn of another coil. Another axis of one coil forms another half-turn of another coil. Independent claims are also included for the following: (1) a magnetic field sensor (2) an alternating voltage generator.