Magnetic coupling device using multi-layer magnetic field sensor

摘要

The magnetic coupling device has at least one electrical conductor element, for providing a magnetic signal field in response to an electrical current and a galvanically separated magnetic field sensor element (S). The latter has a multi-layer system (3) containing at least one soft magnetic measuring layer (6,6') with a given magnetisation direction, for obtaining an increased magnetoresistive effect. The soft magnetic layers are separated from hard magnetic bias layers via non-magnetic intermediate layers.