Abstract: The invention provides a Hall sensor element having a substrate, which has a main surface, having an electrically conductive active region, which extends from the main surface into the substrate, and having a first electrically conductive, buried layer in the substrate, which contacts the active region at a first lower contact surface. From another standpoint, the invention provides a method for measuring a magnetic field with the aid of such a Hall sensor element, in which an electrical measuring current is conducted through the active region between a first upper contact electrode at the main surface and the first lower contact surface. A Hall voltage is picked up in the active region along a path running inclined with respect to a connecting line between the first lower contact surface and the first upper contact electrode.

Abstract: A current sensor for measuring a current in a conductor includes two magnetic field sensors located adjacent to the conductor. The magnetic field sensors are at least two-dimensional magnetic field sensors having two measuring directions, thereby facilitating compensation for an inhomogeneous interference field.

Abstract: A current sensor for measuring a current in a conductor includes two magnetic field sensors located adjacent to the conductor. The magnetic field sensors are at least two-dimensional magnetic field sensors having two measuring directions, thereby facilitating compensation for an inhomogeneous interference field.

Abstract: A harmonically damped oscillator circuit including a controllable oscillator amplifier for generating an oscillator output signal and including an amplitude control circuit for controlling the amplitude A of the oscillator output signal, an amplitude control signal Vcontrol being generated by the amplitude control circuit as a function of a determined amplitude A of the oscillator output signal in such a manner that the oscillator amplifier functions in a predefined operating range having an approximately linear amplification characteristic with a definable, small amplitude at a preset operating point, and the oscillator amplifier being designed in such a manner that the predefined operating range and the preset operating point are independent of the amplitude control signal Vcontrol. Thus, a stable amplitude loop for producing a low-distortion oscillator output signal can be achieved also under consideration of a comparatively large scatter range of the used component characteristics and parameters.