Abstract: A system for the conversion of digital phase shift keying (PSK) signals into digital amplitude shift keying (ASK) signals. The system consists of a power divider, PDIV, with an input, into which a PSK signal at a frequency of 2f is injected, where f is half the frequency of a carrier signal and with an even number M of outputs, from which corresponding signals, i1 . . . iM, are obtained at equal frequency and phase, connected to M argument dividers with tuneable natural resonant frequency, Div1 . . . DivM, obtaining M output signals, O1 . . . OM, from the said dividers and M-1 power combiners, PC1 . . . PCM-1, the inputs of which are connected two by two to the said M output signals, O1 . . . OM, providing M-1 ASK signals at the outputs of the said power combiners, which correspond respectively to each of the M-1 possible changes in phase of the said input PSK signal.