Abstract: A nonrecursive digital filter, particularly for filtering signals wherein identical values frequently occur in succession. The problem of making such a filter fully integratable at low expense is solved in that the time of a change in signal state with respect to a reference point in time is stored, with these points in time being utilized to address a further memory in which the system specific step response of the filter is stored. These step responses are weighted in a computer with the amplitude associated with each change in signal state, and are accumulated with the proper sign so that the accumulated output signal of the computer represents the desired filtered signal.