Filters that belong to the class of "Generalized Feedfoward Filters" (GNFF), can he considered as models in-between FIR and IIR according to its complexity, stability and capacity. This dissertation is concerned in particular with issues related with analogue implementation of one of these GNFF, called the gamma filter. (...); Os filtros que pertencem à classe de generalized feedfoward filters (GNFF) podem-se c...