Telephone coil module e.g. surface mounted device component for hearing aid e.g. in-the-ear hearing aid has coupling condenser and ferrite bead electrically connected to coil wound at coil core, and directly mounted on coil core or coil

摘要

The module has a telephone coil (2) wound at a coil core (1), and a coupling condenser (3) and a ferrite bead (4) electrically connected to the coil. The condenser and bead are directly mounted on the core or the coil, and the condenser serves to connect the coil to a hearing aid. The condenser has an external diameter of 1.5 millimeter, an inner diameter of 0.5 millimeter and a thickness of 0.5 millimeter, and the dimensions of the ferrite bead correspond to the condenser.