Method of filtering a signal using an analog circuit and corresponding filtering circuit

In a method of filtering a signal, the signal is sampled to obtain a series of signal values SV0 to SVn. The signal values are stored in form of charges in a series of capacitors C0 to Cn, said series of capacitors corresponding to said series of signal values SV0 to SVn. The charges on each capacitor are then diffused over neighboring capacitors of said series by connecting a resistor for at least partial charge equalization between each pair of consecutive capacitors Ci, Ci+1 (i=0 to n-1) in said series of capacitors for a time interval selected dependent on a desired filtering result. The remaining voltages across the capacitors of the series after said diffusion step represent filtered signal values corresponding to a filtered signal. With this method a Gaussian filtering with an analog circuit is realized in which the band width of the filtering can be easily adapted.