Coil sensor circuit and method for operating a coil sensor circuit

Abstract

The present disclosure proposes a coil sensor circuit including a sensor coil configured to provide an AC sensor signal, a feedforward amplifier stage configured to amplify the AC sensor signal to obtain an amplified sensor signal, a feedback amplifier stage coupled between an output and an input of the feedforward amplifier stage and configured to provide a control signal for cancelling a DC offset of the feedforward amplifier stage, and a switching circuit The switching circuit is configured to, during a first operational mode of the coil sensor circuit, couple the sensor coil to the input of the feedforward amplifier stage, and, during a second operational mode of the coil sensor circuit, decouple the sensor coil from the feedforward amplifier stage, and increase a gain of the coil sensor circuit with respect to the first operational mode.

Dependencies are inferred from the claim text.