Abstract: A system includes plural sensors to detect at least one of a magnetic field and an electrical field, where each of the plural sensors includes outputs that output sensor signals when a field is detected. Plural signal modulators receive sense signals that correspond to sensor signals from corresponding ones of the plural sensors. Each of the plural signal modulators has first and second control states. In the first control state, each signal modulator outputs sense signals, and, in the second control state, each signal modulator outputs inverted sense signals. A device receives and processes the sense signals or the inverted sense signals.

Abstract: The invention provides for a controller with a control circuit, which contains a feedback path coupled back to the feedback input of the control circuit, a sensor (S) that is arranged in the control circuit and emits a sensor signal at its output, which is converted into a feedback signal and routed back to the feedback input of the control circuit, an error signal generator (F), which generates an error signal and injects it into the control circuit, a detector (D), which monitors a measuring signal of the control circuit that sets the output signal (I2) of the control circuit to a predetermined value as a function of the output signal of the detector. Further, the invention relates to a method for operating this controller, with which an overload operation of the device can be detected.

Abstract: The invention relates to an arrangement of sensors (10, 11, 12, 13), wherein each sensor (10, 11, 12, 13) detects a magnetic or electrical field and outputs an electric basic sensor signal at its sensor outputs (21, 22, 23, 24), wherein the sensor outputs (21, 2) of each sensor (10, 11, 12, 13) are connected to the inputs (41, 42, 43, 44) of a signal modulator (30, 31), wherein the signal modulator (30, 31) has at least two control states. In addition, the invention relates to a method to operate the sensor system, wherein system signals are queried with different configurations of the sensor system and are computed with one another. The sensor system in accordance with the invention has the advantage that it can perform different types of magnetic field measurements in an extremely flexible manner.