Abstract: The invention particularly relates to a system for demodulation of PSK signals which takes advantage from the effects that the locking of resonant circuits by superharmonic injection produce, together with the interference phenomena, and more particularly it relates to a demodulation system which is designed to avoid mutual locking between said resonant circuits.

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.