Abstract: 1. In a system for transmitting a quantized signal having a definite maximum value, a reentry circuit comprising a cyclically operating electronic stepper having a cycle length in step-positions corresponding to the number of steps represented by said maximum value, and successively stepping in response to step-signal input thereto, each position of said stepper including means determinative of the generation of a respective one of three-or-more valued signals, and said circuit including means for, in effect, cancelling, once or more, from the output of said circuit a preassigned whole number of said signal steps whenever the output signal value would exceed said maximum value, and means for converting a group of different step-valued signals into a series of step-pulses to step said stepper around from an initial position through the number of steps represented by said series of pulses.13.