A pulse switched digital multiplier for matching transfer characteristics of digital processes having a plurality of pulse switch positions, and a pulse switch setting circuit which, under the control of a setting code from a setting program, sets the pulse switch to a given one of the pulse switch positions. Each switch position corresponds to a discrete digital multiplication performed by one of a plurality of discrete multiplication coefficients forming part of the discrete number set 2.sup.m, (where m = 0, 1, 2, . . . . ,) and possibly the number 0. A storage device in the form of an integrater is also provided.