the invention relates to a filter device for detecting and / or removing erroneous components like noise , deformations , glitch components or other errors in and / or from a signal , to a demodulation device using the filter device , to an information transmission system using the demodulation device and to a method for detecting a noise impulse in an input signal , cα ). the filter device includes a summing element connected to a correction element . the summing element sums the input signal , cα ) within a reference interval and the correction element verifies the summed input signal ) with at least one signal condition ). finally , the correction element outputs a predetermined signal ) based on the result of the verification between the summed input signal ) with at least one signal condition ). the foregoing filter device is able to remove noise from an input signal . this stabilizes the input signal against environmental influences occurring e . g . during signal transmission .