A set of sensor apparatuses, comprising at least two different sensor apparatuses selected from any of the following:
- (i) a sensor apparatus, comprising:
- an electronic module, comprising:
- at least one voltage-controlled current source;
- a current source port which is operatively and electrically connected to the at least one voltage-controlled current source for providing a voltage-controlled current by way of the at least one voltage-controlled current source;
- an adder device;
- an adder input port which is operatively and electrically connected to the adder device and is adapted to establish connections between the adder device and at least one first external device;
- and
- an adder output port which is operatively and electrically connected to the adder device and is adapted to establish connections between the adder device and at least one second external device;
- wherein the current source port is operatively and electrically connected, or operatively and electrically connectable, to at least one of an electrical resonant circuit and a coil element;
- wherein the adder input port is operatively and electrically connectable, or is operatively and electrically connected, to the current source port or to at least one further coil element;
- wherein by way of the adder device, at least one of an operation of addition and an operation of subtraction of a voltage applied to the adder input port and at least one offset voltage is performed;
- wherein an evaluation signal for evaluation by an evaluation device is providable, or is provided, at the adder output port;
- wherein an electrical resonant circuit is provided which is or becomes operatively and electrically connected to the current source port and the adder input port;
- wherein the at least one first external device comprises the electrical resonant circuit and the coil element;
- and
- the at least one second external device comprises the evaluation device;
- and
- (ii) a sensor apparatus, comprising:
- an electronic module, comprising:
- at least one voltage-controlled current source;
- a current source port which is operatively and electrically connected to the at least one voltage-controlled current source for providing a voltage-controlled current by way of the at least one voltage-controlled current source;
- an adder device;
- an adder input port which is operatively and electrically connected to the adder device and is adapted to establish connections between the adder device and at least one first external device;
- and
- an adder output port which is operatively and electrically connected to the adder device and is adapted to establish connections between the adder device and at least one second external device;
- wherein the current source port is operatively and electrically connected, or operatively and electrically connectable, to at least one of an electrical resonant circuit and a coil element;
- wherein the adder input port is operatively and electrically connectable, or is operatively and electrically connected, to the current source port or to at least one further coil element;
- wherein by way of the adder device, at least one of an operation of addition and an operation of subtraction of a voltage applied to the adder input port and at least one offset voltage is performed;
- wherein an evaluation signal for evaluation by an evaluation device is providable, or is provided, at the adder output port;
- wherein a coil element is provided which is or becomes operatively and electrically connected to the current source port;
- wherein the at least one first external device comprises the electrical resonant circuit and the coil element;
- and
- the at least one second external device comprises the evaluation device.