Patent ID: 9255952
Filing Date: 2016-02-09
CPC Classification: G01D,G01R,G01V

Claim Text:
1. A capacitive sensor for detecting an object, the capacitive sensor comprising: an electrode configuration having at least one sensor electrode; an evaluation circuit connected downstream of said sensor electrode for processing a reception signal generated by said sensor electrode, said evaluation circuit having a transimpedance amplifier, said transimpedance amplifier having means for compensating for a frequency response, said transimpedance amplifier having an operational amplifier with a non-inverting input connected to one of ground or another reference potential, an inverting input connected to said sensor electrode, and an output coupled with negative feedback to said inverting input, said means for compensating for the frequency response, via said negative feedback, including a capacitance and a non-reactive resistor connected in parallel to said capacitance; and an inductance connected between said sensor electrode and said inverting input of said operational amplifier.