Sensor Arrangement and Method for Generating An Amplified Sensor Signal

An sensor arrangement, comprising:

• an amplifier having a signal input to receive an input signal and a signal output to provide an amplified sensor signal that is an inverted signal with respect to the input signal,
• a feedback path that comprises a capacitive sensor and a feedback capacitor, wherein the capacitive sensor is coupled to the signal input of the amplifier and to a feedback node;
• and the feedback capacitor is coupled to the feedback node and to the signal output of the amplifier, and
• a voltage source arrangement that is connected to the feedback node between the capacitive sensor and the feedback capacitor, and
• a further capacitor coupling a further signal input of the amplifier to the feedback node.

A method for generating an amplified sensor signal, comprising:

• providing an input signal by a capacitive sensor to a signal input of an amplifier,
• generating an amplified sensor signal by the amplifier such that the amplified sensor signal is an inverted signal with respect to the input signal and is provided at a signal output of the amplifier,
• generating a feedback from the signal output to the signal input by the capacitive sensor and a feedback capacitor, wherein the capacitive sensor is coupled to the signal input of the amplifier and to a feedback node;
• and the feedback capacitor is coupled to the feedback node and to the signal output of the amplifier,
• charging the capacitive sensor by a voltage source arrangement that is connected to a feedback node between the capacitive sensor and the feedback capacitor, and
• coupling a further signal input of the amplifier to the feedback node by a further capacitor.