In an embodiment, an electronic device for filtering an incoming digital signal includes several elementary filtering modules that include an elementary input configured to receive an incident elementary signal extracted from an incoming signal, an elementary output, and a dedicated capacitive circuit. The device further includes a resistive circuit common to all the elementary filtering modules and configured for cooperating with the capacitive circuit of each elementary filtering module in such a manner as to filter, on the respective elementary output, pulses of the incident elementary signal having a first voltage level and a duration less than a time constant and to deliver a filtered elementary signal on the elementary output.