Active filter device and circuit arrangement comprising an active filter device

摘要

An active filter device (4) comprising:
- sensor terminals (CTN, CTP) for applying a sensor signal depending on a sensed noise signal (Is, Vs),
-an output terminal (OUT) for providing a correction signal (Io, Vo) that is suitable for reducing the noise signal (Is, Vs),
- a signal source (1, 2, 12) being adapted for generating the correction signal (Io, Vo),
-a high-pass filter (HPF) being coupled between the sensor terminals (CTN, CTP) and the signal source,
wherein the correction signal (Io, Vo) is generated with dependence on the high-pass filtered sensor signal.