Abstract: A sensor apparatus for detecting a target object is provided, together with a corresponding method for operating the sensor apparatus. The sensor apparatus comprises a transmitter device which is operated by periodic excitation signals at a basic frequency, a receiver device which couples to the transmitter device, wherein the coupling is dependent on a relative position of the target object with respect to the receiver device, and the receiver device delivers signals at the basic frequency which are dependent on the relative position of the target object with respect to the receiver device. A threshold value checking device checks whether signals lie within or outside a threshold value range. A linking device acts on signals from the receiver device or signals derived therefrom in such a way that signals or signal combinations are shifted into the threshold value range insofar as they previously lay outside this range.

Abstract: A front end for an inductive proximity sensor includes a coil for detecting an approaching metal object and a circuit board, wherein the coil is designed as a circuit board coil disposed in the circuit board, wherein a metal influencing element which is disposed in or on the circuit board has an opening to receive at least one electrical connecting element, wherein a through connection of the circuit board to an electrical connection plane, which serves for electrical connection of the circuit board to a control electronics of the proximity sensor, is made by the at least one electrical connecting element.

Abstract: A sensor apparatus for detecting a target object is provided, together with a corresponding method for operating the sensor apparatus. The sensor apparatus comprises a transmitter device which is operated by periodic excitation signals at a basic frequency, a receiver device which couples to the transmitter device, wherein the coupling is dependent on a relative position of the target object with respect to the receiver device, and the receiver device delivers signals at the basic frequency which are dependent on the relative position of the target object with respect to the receiver device. A threshold value checking device checks whether signals lie within or outside a threshold value range. A linking device acts on signals from the receiver device or signals derived therefrom in such a way that signals or signal combinations are shifted into the threshold value range insofar as they previously lay outside this range.

Abstract: A front end for an inductive proximity sensor includes a coil for detecting an approaching metal object and a circuit board, wherein the coil is designed as a circuit board coil disposed in the circuit board, wherein a metal influencing element which is disposed in or on the circuit board has an opening to receive at least one electrical connecting element, wherein a through connection of the circuit board to an electrical connection plane, which serves for electrical connection of the circuit board to a control electronics of the proximity sensor, is made by the at least one electrical connecting element.