2.sup.N-1 four-terminal phase-reversing switches are arranged in one or more columns of cascaded switches, wherein a frequency having a given relative phase .phi. is applied as an input of the top switch in a cascade. A particular configuration of 2.sup.N-1 different reference-values, determined by a preselected N-Bit binary code, is applied to the respective 2.sup.N-1 switches so that (1) whenever the amplitude value of an applied analog signal reaches a value equal to the reference value applied to any switch, that switch will switch to reverse the phase at its output from the phase at its input, and (2) cause the switching of the phase at the output at each switch ordinally situated in a column below that switch. The respective output phases from a certain subset of N switches of the 2.sup.N-1 switches define the binary values of the preselected N-Bit binary code output from the A/D converter.