1. In a transversal filter with multipliers each multiplying an applied signal with a weighting coefficient dependent on the magnitude of a weighting voltage, a circuit for applying weighting voltages to said multipliers comprising: a plurality of electronic switches divided into groups of switches with each group of switches associated with a corresponding multiplier for controlling the magnitude of the weighting voltage applied to said corresponding multiplier; a plurality of memory cells respectively associated with said electronic switches for storing digital data to turn on or off corresponding electronic switches; and circuit means for supplying to said memory cells data to turn on or off said corresponding electronic switches.